A 26-year-old woman who is 28 weeks pregnant presents to the Emergency Department with sudden-onset severe epigastric pain radiating to her back, associated with nausea and vomiting. She appears distressed and sweaty. Observations show: blood pressure 162/104 mmHg, heart rate 108 bpm, temperature 37.2°C. Urinalysis shows 3+ proteinuria. Blood results show: platelets 82 × 10⁹/L, ALT 520 U/L, bilirubin 68 μmol/L, urea 8.2 mmol/L, creatinine 142 μmol/L. What is the most likely diagnosis requiring urgent obstetric involvement?
Q42
A 75-year-old man with known severe aortic stenosis presents following a syncopal episode while climbing stairs. He reports several months of progressive exertional dyspnoea and chest tightness. Echocardiography 6 months ago showed a mean gradient of 48 mmHg and aortic valve area of 0.8 cm². On examination, blood pressure is 108/74 mmHg, heart rate 68 bpm regular, with an ejection systolic murmur radiating to the carotids and a slow-rising pulse. ECG shows left ventricular hypertrophy with strain pattern. What is the most important next step in his management pathway?
Q43
A 37-year-old woman with systemic lupus erythematosus on azathioprine and prednisolone presents with a 24-hour history of fever, rigors, and productive cough. Observations show: temperature 39.1°C, blood pressure 88/54 mmHg, heart rate 126 bpm, respiratory rate 28 breaths/minute, oxygen saturation 91% on room air. Blood results show: white cell count 2.1 × 10⁹/L, neutrophils 0.4 × 10⁹/L, C-reactive protein 312 mg/L, lactate 3.6 mmol/L. What is the most critical additional immediate intervention alongside standard sepsis management?
Q44
A 48-year-old man presents with 90 minutes of severe central chest pain. His ECG shows ST-segment elevation of 3 mm in leads II, III, and aVF with reciprocal ST-depression in leads I and aVL. Blood pressure is 102/68 mmHg, heart rate 54 bpm. Physical examination reveals clear lung fields and a jugular venous pressure elevated to the angle of the jaw. What is the most likely complication and appropriate immediate management?
Q45
A 54-year-old woman is brought to the Emergency Department with facial swelling and difficulty breathing that started 30 minutes after taking her first dose of ramipril for hypertension. She has marked lip and tongue swelling with inspiratory stridor. Blood pressure is 142/88 mmHg, heart rate 96 bpm, respiratory rate 26 breaths/minute, oxygen saturation 94% on high-flow oxygen. There is no urticarial rash. What is the most appropriate immediate pharmacological management?
Q46
A 62-year-old man is admitted with suspected severe community-acquired pneumonia. He receives intravenous fluid resuscitation and broad-spectrum antibiotics. Despite 30 mL/kg crystalloid administration over 3 hours, his blood pressure remains 86/52 mmHg with a heart rate of 108 bpm. Arterial blood gas shows pH 7.32, lactate 4.1 mmol/L. Central venous pressure is 12 mmHg. Chest examination reveals bibasal crackles. What is the most appropriate next step in management?
Q47
A 31-year-old woman is brought to the Emergency Department after collapsing at a shopping centre. Bystanders report she appeared pale and dizzy before falling to the ground. She regained consciousness within 20 seconds and felt well afterwards. She mentions having similar episodes when standing for prolonged periods or in hot environments. Her observations are: blood pressure 118/72 mmHg lying, 106/68 mmHg standing, heart rate 72 bpm lying, 94 bpm standing. ECG and cardiac examination are normal. What is the most likely diagnosis?
Q48
A 43-year-old woman presents with sudden-onset severe chest pain radiating to her back. She describes the pain as 'tearing' in nature and of maximum intensity from onset. She has a history of Marfan syndrome. On examination, blood pressure is 168/94 mmHg in the right arm and 132/78 mmHg in the left arm. Heart sounds reveal an early diastolic murmur. ECG shows sinus tachycardia with no ischaemic changes. What is the most appropriate immediate investigation?
Q49
A 69-year-old man with chronic obstructive pulmonary disease presents to the Emergency Department with a 3-day history of increased sputum production, fever, and dyspnoea. His observations are: temperature 38.6°C, blood pressure 92/58 mmHg, heart rate 112 bpm, respiratory rate 24 breaths/minute, oxygen saturation 93% on 15 litres oxygen via non-rebreathe mask. Blood results show: white cell count 16.8 × 10⁹/L, C-reactive protein 248 mg/L, urea 9.2 mmol/L, creatinine 132 μmol/L, lactate 2.8 mmol/L. What is the most appropriate immediate management?
Q50
A 57-year-old woman with a history of depression presents to the Emergency Department following a witnessed syncopal episode at home. She was sitting watching television when she suddenly fell forward and lost consciousness for approximately 30 seconds. She has no memory of the event and felt well immediately afterwards. She takes citalopram 20 mg daily. Her observations are: blood pressure 128/76 mmHg lying, 126/74 mmHg standing, heart rate 68 bpm, regular. Her ECG shows sinus rhythm with a QT interval of 520 milliseconds. What is the most appropriate initial management?
Acute Medical Presentations UK Medical PG Practice Questions and MCQs
Question 41: A 26-year-old woman who is 28 weeks pregnant presents to the Emergency Department with sudden-onset severe epigastric pain radiating to her back, associated with nausea and vomiting. She appears distressed and sweaty. Observations show: blood pressure 162/104 mmHg, heart rate 108 bpm, temperature 37.2°C. Urinalysis shows 3+ proteinuria. Blood results show: platelets 82 × 10⁹/L, ALT 520 U/L, bilirubin 68 μmol/L, urea 8.2 mmol/L, creatinine 142 μmol/L. What is the most likely diagnosis requiring urgent obstetric involvement?
A. HELLP syndrome (Correct Answer)
B. Acute fatty liver of pregnancy
C. Placental abruption
D. Acute pancreatitis in pregnancy
E. Acute cholecystitis
Explanation: ***HELLP syndrome***
- This patient presents with **hypertension** and **proteinuria** (suggesting pre-eclampsia), combined with **thrombocytopenia** (platelets 82 × 10⁹/L), significantly **elevated liver enzymes** (ALT 520 U/L), and **hemolysis** (bilirubin 68 μmol/L), which are the defining characteristics of **HELLP syndrome**.
- The severe epigastric pain is a classic symptom, often due to **liver distension** or **subcapsular hematoma**, indicating a critical obstetric emergency requiring urgent management and delivery.
*Acute pancreatitis in pregnancy*
- While **epigastric pain radiating to the back** is a hallmark of pancreatitis, this diagnosis does not account for the profound **thrombocytopenia**, severe **hypertension**, or **proteinuria** observed.
- Confirmation typically relies on markedly elevated **serum amylase or lipase** levels, which are not provided as the primary distinguishing features here.
*Acute fatty liver of pregnancy*
- This condition typically presents with more prominent **hypoglycemia**, severe **coagulopathy** (prolonged PT/INR), and sometimes acute renal failure, which are less emphasized than the specific HELLP triad in this case.
- Although it involves liver dysfunction, the combined severe **hypertension** and **proteinuria** point more strongly towards a pre-eclampsia spectrum disorder.
*Placental abruption*
- **Placental abruption** is characterized by **painful vaginal bleeding**, uterine tenderness, and fetal distress, which are not the primary symptoms described.
- It does not explain the specific laboratory abnormalities of **thrombocytopenia**, elevated **liver enzymes**, and **hemolysis** seen in this patient.
*Acute cholecystitis*
- Acute cholecystitis typically presents with **right upper quadrant pain**, often with **fever** and **leukocytosis**, and may be associated with gallstones.
- It does not account for the systemic findings of **hypertension**, **proteinuria**, or the degree of **thrombocytopenia** and **liver enzyme elevation** seen in this pregnant patient.
Question 42: A 75-year-old man with known severe aortic stenosis presents following a syncopal episode while climbing stairs. He reports several months of progressive exertional dyspnoea and chest tightness. Echocardiography 6 months ago showed a mean gradient of 48 mmHg and aortic valve area of 0.8 cm². On examination, blood pressure is 108/74 mmHg, heart rate 68 bpm regular, with an ejection systolic murmur radiating to the carotids and a slow-rising pulse. ECG shows left ventricular hypertrophy with strain pattern. What is the most important next step in his management pathway?
A. Prescribe furosemide and atenolol for symptom control and arrange outpatient cardiology follow-up
B. Arrange urgent cardiology review for consideration of surgical or transcatheter aortic valve replacement (Correct Answer)
C. Perform coronary angiography to exclude concurrent coronary artery disease before considering intervention
D. Commence anticoagulation with warfarin and arrange cardioversion for rate control
E. Advise exercise restriction and repeat echocardiography in 3 months
Explanation: ***Arrange urgent cardiology review for consideration of surgical or transcatheter aortic valve replacement***- The patient's presentation with **syncope**, **exertional dyspnoea**, and **chest tightness** represents the classic triad of **symptomatic severe aortic stenosis**. These symptoms signify a critical stage with a significantly reduced prognosis without intervention.- Given the **severe echocardiographic findings** (mean gradient 48 mmHg, AVA 0.8 cm²) and the development of symptoms, **surgical aortic valve replacement (SAVR)** or **transcatheter aortic valve implantation (TAVI/TAVR)** is urgently indicated to improve survival and quality of life.*Prescribe furosemide and atenolol for symptom control and arrange outpatient cardiology follow-up*- **Beta-blockers (atenolol)** are generally contraindicated in severe symptomatic aortic stenosis because they can reduce **cardiac output** and worsen symptoms due to the **fixed outflow obstruction**.- **Outpatient follow-up** is inappropriate and dangerous for a patient with **symptomatic severe AS** presenting with **syncope**, which is a life-threatening symptom requiring immediate and definitive management.*Perform coronary angiography to exclude concurrent coronary artery disease before considering intervention*- While **coronary angiography** is typically performed as part of the pre-operative workup for **valve replacement**, it is a diagnostic step within the pathway, not the "most important next step" in terms of overall management strategy.- The immediate priority is the **urgent referral** to a specialized cardiology or cardiac surgery team who will then coordinate all necessary pre-procedural investigations, including angiography if indicated.*Commence anticoagulation with warfarin and arrange cardioversion for rate control*- This approach is indicated for **atrial fibrillation with rapid ventricular response** or a need for stroke prevention, but the patient's heart rate is **regular at 68 bpm**, indicating sinus rhythm.- This treatment pathway does not address the fundamental problem of **severe aortic valve obstruction**, which is the cause of the patient's critical symptoms.*Advise exercise restriction and repeat echocardiography in 3 months*- **Watchful waiting** or delaying intervention is **contraindicated** once a patient with severe AS develops **symptoms**, especially **syncope**.- This approach would expose the patient to an unacceptably high risk of **sudden cardiac death** and rapid clinical deterioration, as symptomatic severe AS has a very poor prognosis without intervention.
Question 43: A 37-year-old woman with systemic lupus erythematosus on azathioprine and prednisolone presents with a 24-hour history of fever, rigors, and productive cough. Observations show: temperature 39.1°C, blood pressure 88/54 mmHg, heart rate 126 bpm, respiratory rate 28 breaths/minute, oxygen saturation 91% on room air. Blood results show: white cell count 2.1 × 10⁹/L, neutrophils 0.4 × 10⁹/L, C-reactive protein 312 mg/L, lactate 3.6 mmol/L. What is the most critical additional immediate intervention alongside standard sepsis management?
A. Administer granulocyte colony-stimulating factor (G-CSF)
B. Commence broad-spectrum antibiotics with anti-pseudomonal cover (Correct Answer)
C. Administer intravenous immunoglobulin
D. Increase prednisolone dose to treat possible lupus flare
E. Arrange urgent haematology review for bone marrow biopsy
Explanation: ***Commence broad-spectrum antibiotics with anti-pseudomonal cover***- This patient presents with **neutropenic sepsis** (neutrophils < 0.5 × 10⁹/L and fever) and **septic shock** (hypotension, tachycardia, high lactate), a medical emergency requiring **broad-spectrum anti-pseudomonal antibiotics** within one hour.- Anti-pseudomonal coverage is essential because **Pseudomonas aeruginosa** can cause rapid clinical deterioration and death in severely immunocompromised and neutropenic patients. *Administer granulocyte colony-stimulating factor (G-CSF)*- While **G-CSF** can help shorten the duration of neutropenia and is an important adjunctive therapy, it is not the primary immediate treatment and does not replace the urgent need for antibiotics.- It is usually considered as an adjunct in high-risk cases or secondary prophylaxis and should only be initiated after stabilization and specialist consultation, not as the first line in acute sepsis. *Administer intravenous immunoglobulin*- **Intravenous immunoglobulin (IVIG)** has no established role in the acute management of bacterial sepsis or **neutropenic sepsis** and does not address the underlying bacterial infection.- This intervention is reserved for specific **hypogammaglobulinemia** states or certain autoimmune conditions, not acute septic shock. *Increase prednisolone dose to treat possible lupus flare*- Increasing steroids would be dangerous as the primary problem is a **life-threatening infection** exacerbated by **azathioprine-induced immunosuppression**, not an SLE flare.- Elevated **C-reactive protein (CRP)**, the specific presence of a productive cough and rigors, and severe neutropenia all strongly point toward an infectious etiology rather than lupus activity. *Arrange urgent haematology review for bone marrow biopsy*- A **bone marrow biopsy** is not an emergency procedure and would inappropriately delay the life-saving resuscitation and antibiotic therapy required for **septic shock**.- The cause of neutropenia is highly likely the **azathioprine therapy**, and the immediate focus must be on treating the **septic shock** identified by hypotension and high lactate.
Question 44: A 48-year-old man presents with 90 minutes of severe central chest pain. His ECG shows ST-segment elevation of 3 mm in leads II, III, and aVF with reciprocal ST-depression in leads I and aVL. Blood pressure is 102/68 mmHg, heart rate 54 bpm. Physical examination reveals clear lung fields and a jugular venous pressure elevated to the angle of the jaw. What is the most likely complication and appropriate immediate management?
A. Right ventricular infarction; administer intravenous fluid bolus and avoid nitrates (Correct Answer)
B. Left ventricular failure; administer intravenous furosemide and commence CPAP
C. Cardiac tamponade; arrange urgent pericardiocentesis
D. Cardiogenic shock; commence inotropic support with dobutamine
E. Complete heart block; insert temporary pacing wire
Explanation: ***Right ventricular infarction; administer intravenous fluid bolus and avoid nitrates***- The patient presents with an **inferior STEMI** (ST-elevation in leads II, III, and aVF) complicated by **right ventricular (RV) infarction**, characterized by the triad of **hypotension**, **elevated JVP**, and **clear lung fields**.- RV-dependent patients require high filling pressures to maintain cardiac output; **intravenous fluid boluses** are the first-line treatment, while **nitrates** and diuretics must be avoided as they decrease preload and can cause severe hypotension.*Left ventricular failure; administer intravenous furosemide and commence CPAP*- Left ventricular failure typically presents with **pulmonary rales** and evidence of pulmonary edema, which contradicts the finding of **clear lung fields** in this patient.- Administering **furosemide** would be contraindicated here as it would further reduce the essential preload needed for the infarcted right ventricle, exacerbating hypotension.*Cardiac tamponade; arrange urgent pericardiocentesis*- While tamponade presents with **Beck's triad** (hypotension, JVP elevation, muffled heart sounds), it is rarely a presenting feature of acute MI unless there is **free wall rupture**, which typically occurs days later.- The ECG specifically shows **localized ST-elevation** (inferior leads) rather than the diffuse ST-elevation or **electrical alternans** usually seen with tamponade.*Cardiogenic shock; commence inotropic support with dobutamine*- Though the patient is hypotensive, the initial management for hypotension due to **RV infarction** is **aggressive fluid resuscitation** to optimize preload-dependent output.- **Inotropes** like dobutamine are considered secondary interventions if hypotension persists despite adequate fluid loading and restoration of sinus rhythm.*Complete heart block; insert temporary pacing wire*- While the patient is **bradycardic** (54 bpm), common in inferior MI due to vagal tone, the ECG does not describe **P-wave dissociation** characteristic of complete heart block.- **Temporary pacing** is indicated for hemodynamically unstable bradycardia that does not respond to atropine or fluids, but the primary life-threatening complication here is RV infarction, which requires fluid resuscitation.
Question 45: A 54-year-old woman is brought to the Emergency Department with facial swelling and difficulty breathing that started 30 minutes after taking her first dose of ramipril for hypertension. She has marked lip and tongue swelling with inspiratory stridor. Blood pressure is 142/88 mmHg, heart rate 96 bpm, respiratory rate 26 breaths/minute, oxygen saturation 94% on high-flow oxygen. There is no urticarial rash. What is the most appropriate immediate pharmacological management?
A. Intramuscular adrenaline 500 micrograms and intravenous hydrocortisone
B. Intravenous C1-esterase inhibitor concentrate or icatibant (Correct Answer)
C. Nebulized adrenaline and intravenous dexamethasone
D. Intravenous chlorphenamine and hydrocortisone only
E. Intramuscular adrenaline and intravenous tranexamic acid
Explanation: ***Intravenous C1-esterase inhibitor concentrate or icatibant***
- The patient's presentation with facial and airway swelling shortly after taking **ramipril** (an ACE inhibitor), coupled with the **absence of urticaria**, is characteristic of **ACE inhibitor-induced angioedema**, which is **bradykinin-mediated**.
- **C1-esterase inhibitor concentrate** replaces a crucial enzyme involved in bradykinin degradation, while **icatibant** is a direct **bradykinin B2 receptor antagonist**, both specifically targeting the pathogenic mechanism of this condition.
*Intramuscular adrenaline 500 micrograms and intravenous hydrocortisone*
- These are the first-line treatments for **anaphylaxis**, which is a severe IgE-mediated allergic reaction typically presenting with **hypotension**, tachycardia, and an **urticarial rash**.
- Adrenaline and corticosteroids are largely **ineffective** in bradykinin-mediated angioedema as they do not address the underlying **bradykinin accumulation** or its effects.
*Nebulized adrenaline and intravenous dexamethasone*
- **Nebulized adrenaline** may offer transient symptomatic relief for upper airway obstruction but does not treat the root cause of **ACEi-induced angioedema** and its progressive nature.
- **Dexamethasone**, a corticosteroid, has a slow onset of action and is **ineffective** in reversing the immediate, severe bradykinin-mediated swelling.
*Intravenous chlorphenamine and hydrocortisone only*
- **Chlorphenamine** (an antihistamine) and **hydrocortisone** (a corticosteroid) are effective for **histamine-mediated allergic reactions** but will not alleviate bradykinin-mediated angioedema.
- Relying solely on these medications will dangerously **delay effective treatment** for this potentially life-threatening airway obstruction.
*Intramuscular adrenaline and intravenous tranexamic acid*
- As previously noted, **adrenaline** is not indicated for **ACEi-induced angioedema** due to its non-histaminergic mechanism.
- While **tranexamic acid** is used in some forms of angioedema, particularly hereditary, it is not the primary immediate pharmacological management for **acute ACE inhibitor-induced angioedema**, where icatibant or C1-INH are superior.
Question 46: A 62-year-old man is admitted with suspected severe community-acquired pneumonia. He receives intravenous fluid resuscitation and broad-spectrum antibiotics. Despite 30 mL/kg crystalloid administration over 3 hours, his blood pressure remains 86/52 mmHg with a heart rate of 108 bpm. Arterial blood gas shows pH 7.32, lactate 4.1 mmol/L. Central venous pressure is 12 mmHg. Chest examination reveals bibasal crackles. What is the most appropriate next step in management?
A. Commence noradrenaline infusion via central venous catheter (Correct Answer)
B. Administer further 1000 mL crystalloid fluid bolus
C. Arrange urgent echocardiography to assess cardiac function
D. Commence inotropic support with dobutamine
E. Insert arterial line for blood pressure monitoring and reduce fluid administration
Explanation: ***Commence noradrenaline infusion via central venous catheter***- This patient presents with **refractory hypotension** (BP 86/52 mmHg) and **hyperlactataemia** (4.1 mmol/L) despite initial fluid resuscitation (30 mL/kg), consistent with **septic shock**.- **Noradrenaline** is the **first-line vasopressor** to achieve a target Mean Arterial Pressure (MAP) ">= 65 mmHg" by increasing systemic vascular resistance, especially when signs of fluid overload (CVP 12 mmHg, bibasal crackles) are present.*Administer further 1000 mL crystalloid fluid bolus*- The patient has already received 30 mL/kg crystalloids, and signs of **fluid overload**, such as **bibasal crackles** and a **CVP of 12 mmHg**, are present.- Further aggressive fluid administration is likely to exacerbate **pulmonary edema** and **respiratory compromise** without resolving the hypotension of distributive shock.*Arrange urgent echocardiography to assess cardiac function*- While **echocardiography** can be valuable for assessing cardiac function in shock, it is not the immediate priority for a patient with **life-threatening hypotension** and signs of distributive shock.- Delaying the initiation of **vasopressor therapy** to perform an urgent echo would be inappropriate and could worsen clinical outcomes.*Commence inotropic support with dobutamine*- **Dobutamine** is primarily an **inotrope** used for cardiogenic shock or persistent hypoperfusion after adequate fluid resuscitation and vasopressor initiation, especially with signs of **low cardiac output**.- In **septic shock**, the primary defect is often **vasodilation** (low SVR). Starting dobutamine, which also has vasodilatory effects, before achieving adequate MAP with a vasopressor like noradrenaline, could worsen hypotension.*Insert arterial line for blood pressure monitoring and reduce fluid administration*- While an **arterial line** is essential for accurate and continuous blood pressure monitoring in shock and during vasopressor therapy, it is a monitoring tool, not the primary therapeutic intervention required to reverse shock.- Reducing fluid administration is appropriate given the signs of fluid overload, but this passive measure alone will not sufficiently treat the underlying **distributive shock** and persistent hypotension; active vasopressor support is urgently needed.
Question 47: A 31-year-old woman is brought to the Emergency Department after collapsing at a shopping centre. Bystanders report she appeared pale and dizzy before falling to the ground. She regained consciousness within 20 seconds and felt well afterwards. She mentions having similar episodes when standing for prolonged periods or in hot environments. Her observations are: blood pressure 118/72 mmHg lying, 106/68 mmHg standing, heart rate 72 bpm lying, 94 bpm standing. ECG and cardiac examination are normal. What is the most likely diagnosis?
A. Vasovagal syncope (Correct Answer)
B. Cardiac arrhythmia
C. Postural orthostatic tachycardia syndrome
D. Aortic stenosis
E. Hypertrophic cardiomyopathy
Explanation: ***Vasovagal syncope***
- This clinical presentation is classic for **reflex syncope**, triggered by situational factors like **prolonged standing** or **hot environments**, and preceded by a **prodrome** of pallor and dizziness.
- The rapid recovery within **20 seconds** and the absence of abnormal cardiac findings or ECG changes reinforce this as a benign autonomic response rather than a structural or electrical heart issue.
*Cardiac arrhythmia*
- Arrhythmic syncope typically occurs **suddenly** without a significant prodrome and is not usually linked to specific postural triggers like heat or prolonged standing.
- A **normal ECG** and immediate recovery to a well state in a young patient significantly decrease the likelihood of a life-threatening arrhythmia.
*Postural orthostatic tachycardia syndrome*
- **POTS** is defined by a heart rate increase of **>30 bpm** within 10 minutes of standing; this patient's increase was only **22 bpm**, which is a normal physiological response.
- While POTS causes dizziness, it typically manifests as persistent **orthostatic intolerance** rather than frank, self-limiting syncope with a classic prodrome.
*Aortic stenosis*
- **Aortic stenosis** usually presents with syncope during **exertion** due to the inability to increase cardiac output across a narrowed valve.
- The absence of a **systolic ejection murmur** and the patient’s young age make this diagnosis highly unlikely.
*Hypertrophic cardiomyopathy*
- Syncope in **HCM** is often associated with physical activity and may be accompanied by a **family history** of sudden cardiac death.
- This patient has a **normal cardiac examination** and a normal ECG, whereas HCM typically shows signs of **left ventricular hypertrophy** on an ECG.
Question 48: A 43-year-old woman presents with sudden-onset severe chest pain radiating to her back. She describes the pain as 'tearing' in nature and of maximum intensity from onset. She has a history of Marfan syndrome. On examination, blood pressure is 168/94 mmHg in the right arm and 132/78 mmHg in the left arm. Heart sounds reveal an early diastolic murmur. ECG shows sinus tachycardia with no ischaemic changes. What is the most appropriate immediate investigation?
A. Transthoracic echocardiography
B. CT aortic angiography (Correct Answer)
C. Chest X-ray
D. Coronary angiography
E. Troponin measurement
Explanation: ***CT aortic angiography***
- **CT aortic angiography (CTA)** is the most appropriate immediate investigation for suspected **aortic dissection** due to its high sensitivity, specificity, and rapid acquisition, allowing visualization of the entire aorta and identification of the **intimal flap**.
- The patient's presentation with sudden severe 'tearing' chest pain radiating to the back, history of **Marfan syndrome**, **blood pressure discrepancy** between arms, and an **early diastolic murmur** are classic features highly suggestive of this life-threatening condition.
*Transthoracic echocardiography*
- **Transthoracic echocardiography (TTE)** is less sensitive for detecting **aortic dissection**, particularly in the **descending aorta**, due to acoustic windows and limitations in visualizing the entire aortic length.
- While useful for assessing the **aortic root**, detecting **pericardial effusion**, or **aortic regurgitation**, it cannot definitively rule out a dissection in all segments of the aorta.
*Chest X-ray*
- A **Chest X-ray** may show non-specific findings such as **mediastinal widening** or an abnormal aortic contour, but these signs are often absent or inconclusive in a significant number of **aortic dissection** cases.
- It lacks the diagnostic accuracy (sensitivity and specificity) required to be a definitive primary imaging modality for an acute, life-threatening condition like aortic dissection.
*Coronary angiography*
- **Coronary angiography** is an invasive procedure used to diagnose **coronary artery disease**, which is not the primary suspected diagnosis in this patient given the clinical presentation.
- Performing an invasive procedure in a patient with suspected **aortic dissection** carries a risk of extending the dissection or causing further complications by manipulating the great vessels.
*Troponin measurement*
- **Troponin levels** are markers of myocardial injury and can be elevated in **aortic dissection** if the dissection compromises the **coronary ostia** leading to ischemia.
- However, troponin elevation is non-specific for aortic dissection, and waiting for results would inappropriately delay the critical and definitive imaging diagnosis required for this emergent condition.
Question 49: A 69-year-old man with chronic obstructive pulmonary disease presents to the Emergency Department with a 3-day history of increased sputum production, fever, and dyspnoea. His observations are: temperature 38.6°C, blood pressure 92/58 mmHg, heart rate 112 bpm, respiratory rate 24 breaths/minute, oxygen saturation 93% on 15 litres oxygen via non-rebreathe mask. Blood results show: white cell count 16.8 × 10⁹/L, C-reactive protein 248 mg/L, urea 9.2 mmol/L, creatinine 132 μmol/L, lactate 2.8 mmol/L. What is the most appropriate immediate management?
A. Administer intravenous antibiotics after obtaining blood cultures and commence fluid resuscitation (Correct Answer)
B. Arrange urgent intensive care assessment for intubation and mechanical ventilation
C. Commence non-invasive ventilation with BiPAP and nebulized bronchodilators
D. Reduce oxygen to maintain target saturations of 88-92% and review arterial blood gas
E. Administer oral antibiotics and prednisolone, and observe for 4 hours before reassessing
Explanation: ***Administer intravenous antibiotics after obtaining blood cultures and commence fluid resuscitation***
- This patient presents with an acute exacerbation of COPD complicated by **sepsis** and features of **septic shock**, indicated by hypotension (BP 92/58), tachycardia (HR 112), fever (38.6°C), and elevated lactate (2.8 mmol/L).
- Immediate management involves adhering to the **Sepsis Six** bundle, prioritizing **blood cultures** followed by prompt administration of **broad-spectrum intravenous antibiotics** and **fluid resuscitation** to address the infection and improve tissue perfusion.
*Arrange urgent intensive care assessment for intubation and mechanical ventilation*
- While the patient is critically ill, the immediate priority is **resuscitation** and addressing the underlying sepsis, not immediate intubation.
- **Intubation and mechanical ventilation** should be considered if initial resuscitation fails and the patient develops refractory respiratory failure or a significantly decreased level of consciousness.
*Commence non-invasive ventilation with BiPAP and nebulized bronchodilators*
- **Non-invasive ventilation (NIV)** is appropriate for hypercapnic respiratory failure in COPD, but the patient's primary life-threatening issue is **septic shock**, not solely respiratory failure.
- Starting NIV without first stabilizing the circulatory collapse and administering antibiotics would delay crucial interventions for sepsis.
*Reduce oxygen to maintain target saturations of 88-92% and review arterial blood gas*
- While target saturations for COPD are typically **88-92%**, in a patient with **severe sepsis and hypoxemia** (93% on 15L O2), aggressive oxygen therapy is initially required to ensure adequate tissue oxygenation.
- Prioritizing oxygen titration over immediate **antibiotics and fluid resuscitation** would be a critical delay in sepsis management.
*Administer oral antibiotics and prednisolone, and observe for 4 hours before reassessing*
- The patient's presentation with **hypotension, organ dysfunction**, and high inflammatory markers indicates a severe, life-threatening infection requiring **intravenous antibiotics**.
- **Oral antibiotics** and a 4-hour observation period are wholly inadequate for managing septic shock and violate the principles of timely sepsis management.
Question 50: A 57-year-old woman with a history of depression presents to the Emergency Department following a witnessed syncopal episode at home. She was sitting watching television when she suddenly fell forward and lost consciousness for approximately 30 seconds. She has no memory of the event and felt well immediately afterwards. She takes citalopram 20 mg daily. Her observations are: blood pressure 128/76 mmHg lying, 126/74 mmHg standing, heart rate 68 bpm, regular. Her ECG shows sinus rhythm with a QT interval of 520 milliseconds. What is the most appropriate initial management?
A. Discharge with advice to avoid triggers and follow-up with her general practitioner
B. Admit for cardiac monitoring and review of QT-prolonging medication (Correct Answer)
C. Arrange urgent echocardiography and discharge if structurally normal heart
D. Prescribe a beta-blocker and arrange outpatient cardiology follow-up
E. Perform carotid sinus massage and discharge if no abnormality detected
Explanation: ***Admit for cardiac monitoring and review of QT-prolonging medication***- The patient's **QT interval of 520 milliseconds** is significantly prolonged, especially when combined with a witnessed **syncopal episode**, indicating a high risk for **Torsades de Pointes** and other life-threatening arrhythmias.- **Citalopram** is a known cause of **acquired Long QT Syndrome**. Immediate admission allows for continuous **cardiac monitoring**, electrolyte management, and cautious adjustment or cessation of the causative medication.*Discharge with advice to avoid triggers and follow-up with her general practitioner*- Discharging this patient is inappropriate and unsafe given the **prolonged QT interval** and recent **syncope**, which places her at high risk for imminent **cardiac events**.- Avoiding triggers is a secondary measure; the primary concern is the identified **electrical abnormality** on ECG, which requires acute medical intervention.*Arrange urgent echocardiography and discharge if structurally normal heart*- An **echocardiogram** evaluates the heart's structure and function but does not directly assess or address the **electrical instability** responsible for QT prolongation and potential arrhythmias.- A **structurally normal heart** does not rule out a life-threatening arrhythmogenic risk stemming from an **electrical conduction abnormality** like a prolonged QT interval.*Prescribe a beta-blocker and arrange outpatient cardiology follow-up*- While **beta-blockers** are a mainstay in the management of some forms of Long QT Syndrome, the immediate priority in **drug-induced QT prolongation** with syncope is stopping the causative drug and acute monitoring.- Outpatient follow-up is insufficient for a patient presenting with acute **syncope** and a critical **ECG abnormality** that requires urgent inpatient assessment and management.*Perform carotid sinus massage and discharge if no abnormality detected*- **Carotid sinus massage** is used to diagnose carotid sinus hypersensitivity, which presents with syncope triggered by neck pressure, not spontaneous syncope while sitting.- This procedure is not indicated in the presence of a clear **QT prolongation** on ECG and would distract from the true underlying **cardiac electrical instability**.
