A 41-year-old woman with no known allergies is brought to the Emergency Department by ambulance 25 minutes after eating at a seafood restaurant. She has developed generalized urticaria, lip swelling, and difficulty breathing. Her blood pressure is 85/50 mmHg, heart rate 125 bpm, respiratory rate 28/min with audible wheeze, and oxygen saturation 91% on room air. After administering intramuscular adrenaline 500 micrograms, oxygen, and intravenous fluids, what is the most appropriate next step in her management?
Q92
A 59-year-old man presents with sudden-onset severe chest pain radiating to his back. His blood pressure is 168/95 mmHg in the right arm and 142/88 mmHg in the left arm. CT aortic angiogram shows a Stanford Type A aortic dissection extending from the aortic root to the descending aorta. While awaiting cardiothoracic surgical transfer, what is the primary therapeutic goal of medical management?
Q93
A 68-year-old woman with breast cancer on chemotherapy presents to the Emergency Department with a 6-hour history of fever, rigors, and feeling generally unwell. Her temperature is 38.7°C, heart rate 118 bpm, blood pressure 102/68 mmHg, respiratory rate 22/min, and oxygen saturation 96% on room air. Her white cell count is 1.2 × 10⁹/L with neutrophils 0.4 × 10⁹/L. What is the pathophysiological mechanism that makes this patient particularly vulnerable to severe infection?
Q94
A 52-year-old man attends the Emergency Department following a syncopal episode while exercising. His father died suddenly aged 48. On examination, he has a jerky carotid pulse and a systolic murmur that increases with Valsalva manoeuvre. His ECG shows left ventricular hypertrophy with deep T-wave inversions. What is the underlying mechanism causing his syncope?
Q95
A 36-year-old man presents to the Emergency Department with 3 hours of central chest pain. His ECG shows ST-segment elevation in leads II, III, and aVF. He has a blood pressure of 145/90 mmHg and heart rate of 92 bpm. Primary percutaneous coronary intervention (PCI) is available but will take 90 minutes to organize. What is the most appropriate immediate management?
Q96
A 43-year-old woman is admitted with suspected sepsis. Her blood pressure is 88/52 mmHg despite 30 ml/kg fluid resuscitation. Her lactate is 4.2 mmol/L. She requires noradrenaline infusion to maintain mean arterial pressure above 65 mmHg. According to the Surviving Sepsis Campaign guidelines, what is the initial target mean arterial pressure in the first hour of managing this patient?
Q97
A 69-year-old woman presents to the Emergency Department with a 6-hour history of severe abdominal pain and vomiting. She has a history of atrial fibrillation but stopped taking her warfarin 3 months ago due to recurrent epistaxis. On examination, she has generalised abdominal tenderness with guarding but the degree of peritonism seems disproportionate to the mild tenderness on palpation. Her observations show: temperature 37.2°C, heart rate 110 bpm (irregularly irregular), blood pressure 135/80 mmHg. Blood tests reveal: WCC 16.8 × 10⁹/L, lactate 4.8 mmol/L, amylase 98 U/L (normal). An erect chest X-ray shows no free air under the diaphragm. What is the most likely diagnosis?
Q98
A 34-year-old man collapses during competitive squash. Witnesses report he suddenly fell to the ground without warning. Cardiopulmonary resuscitation was started immediately and an automated external defibrillator delivered one shock before paramedics arrived. Return of spontaneous circulation was achieved. He is now unconscious but breathing spontaneously with a GCS of 6 (E1, V1, M4). His blood pressure is 110/70 mmHg, heart rate 95 bpm (sinus rhythm on monitor), temperature 36.8°C. He has no significant past medical history. His post-resuscitation ECG shows normal sinus rhythm with deep T wave inversion in the lateral leads and prominent Q waves in leads V1-V3. What is the single most important investigation to identify the underlying cause of his cardiac arrest?
Q99
A 57-year-old man presents with central chest pain lasting 3 hours. His initial ECG shows ST depression of 1.5 mm in leads V4-V6 and T wave inversion in leads I, aVL, V5, and V6. His high-sensitivity troponin I at presentation is 45 ng/L (normal <16 ng/L). He has a history of hypertension and is a current smoker. A repeat troponin 3 hours later is 152 ng/L. His GRACE score is calculated as 142. Based on current guidelines, what is the most appropriate timing for invasive coronary angiography?
Q100
A 82-year-old man is brought to the Emergency Department from a nursing home with a 48-hour history of confusion and reduced oral intake. He has advanced dementia and multiple comorbidities. On examination, he is drowsy but rousable, with cool peripheries and prolonged capillary refill time >4 seconds. Observations show: temperature 36.2°C, heart rate 118 bpm, blood pressure 92/58 mmHg, respiratory rate 26/min, oxygen saturation 91% on room air. Blood tests reveal: lactate 5.8 mmol/L, creatinine 298 µmol/L (baseline 110 µmol/L), urea 24.5 mmol/L. His nursing home records indicate he has a DNACPR order in place and that his family wished for comfort-focused care. What is the most appropriate management approach?
Acute Medical Presentations UK Medical PG Practice Questions and MCQs
Question 91: A 41-year-old woman with no known allergies is brought to the Emergency Department by ambulance 25 minutes after eating at a seafood restaurant. She has developed generalized urticaria, lip swelling, and difficulty breathing. Her blood pressure is 85/50 mmHg, heart rate 125 bpm, respiratory rate 28/min with audible wheeze, and oxygen saturation 91% on room air. After administering intramuscular adrenaline 500 micrograms, oxygen, and intravenous fluids, what is the most appropriate next step in her management?
A. Repeat intramuscular adrenaline 500 micrograms after 5 minutes if no improvement (Correct Answer)
B. Administer intravenous hydrocortisone 200 mg immediately
C. Give nebulized salbutamol 5 mg
D. Administer oral antihistamine
E. Prepare for emergency cricothyroidotomy
Explanation: ***Repeat intramuscular adrenaline 500 micrograms after 5 minutes if no improvement***
- In **anaphylaxis** with persistent signs of cardiovascular compromise (hypotension) and respiratory distress (wheeze, low SpO2) after the initial dose, **intramuscular adrenaline** (1:1000) is the first-line treatment and must be repeated.
- Adrenaline rapidly causes **vasoconstriction** to combat hypotension and **bronchodilation** to relieve wheezing, and repeated doses are crucial until clinical improvement is observed.
*Administer intravenous hydrocortisone 200 mg immediately*
- **Corticosteroids** like hydrocortisone have a **delayed onset of action** and are not primary treatments for the immediate life-threatening symptoms of anaphylaxis.
- While they can help prevent **biphasic reactions** and reduce prolonged symptoms, they should never delay the administration or repetition of adrenaline.
*Give nebulized salbutamol 5 mg*
- **Nebulized salbutamol** is effective for **bronchospasm** but does not address the systemic **vasodilation**, hypotension, or laryngeal edema characteristic of severe anaphylaxis.
- It serves as an **adjunctive therapy** for persistent wheezing after adrenaline has been adequately administered and is not a substitute for adrenaline.
*Administer oral antihistamine*
- **Oral antihistamines** primarily alleviate **cutaneous symptoms** such as urticaria and pruritus but have no significant role in managing the life-threatening airway compromise or cardiovascular collapse in anaphylaxis.
- They are **not essential** in the acute resuscitation phase and are of lower priority compared to adrenaline.
*Prepare for emergency cricothyroidotomy*
- **Emergency cricothyroidotomy** is a procedure reserved for **complete upper airway obstruction** that cannot be managed by less invasive methods like intubation.
- The patient has a **wheeze** (indicating lower airway involvement) and hypotension, which are primarily indications for continued medical management with **adrenaline**, not immediate surgical airway intervention.
Question 92: A 59-year-old man presents with sudden-onset severe chest pain radiating to his back. His blood pressure is 168/95 mmHg in the right arm and 142/88 mmHg in the left arm. CT aortic angiogram shows a Stanford Type A aortic dissection extending from the aortic root to the descending aorta. While awaiting cardiothoracic surgical transfer, what is the primary therapeutic goal of medical management?
A. Reduce heart rate to minimize aortic wall shear stress and prevent dissection propagation (Correct Answer)
B. Achieve aggressive blood pressure reduction to below 100/60 mmHg
C. Maintain high blood pressure to ensure adequate end-organ perfusion
D. Provide anticoagulation to prevent thrombosis of the false lumen
E. Administer thrombolysis to restore flow in the true lumen
Explanation: ***Reduce heart rate to minimize aortic wall shear stress and prevent dissection propagation***
- The primary goal in acute aortic dissection is to reduce **dP/dt (shear stress)**, which is the rate of rise of pressure, to prevent the extension of the **intimal tear**.
- Intravenous **beta-blockers** (e.g., esmolol, labetalol) are the first-line treatment to achieve a target heart rate of **less than 60 beats per minute**.
*Achieve aggressive blood pressure reduction to below 100/60 mmHg*
- While blood pressure control is vital, the recommended target systolic pressure is usually **100-120 mmHg**, not lower, to prevent **hypoperfusion**.
- Reducing blood pressure to such low levels as **100/60 mmHg** may cause myocardial or cerebral ischemia and is considered overly aggressive.
*Maintain high blood pressure to ensure adequate end-organ perfusion*
- High blood pressure (hypertension) significantly increases the risk of **aortic rupture** and expansion of the **false lumen**.
- While perfusion must be maintained, the mechanical risk of dissection propagation far outweighs the benefits of keeping blood pressure high.
*Provide anticoagulation to prevent thrombosis of the false lumen*
- **Anticoagulation** is strictly **contraindicated** in acute aortic dissection because it increases the risk of fatal bleeding into the mediastinum or pericardium.
- Thrombosis of the false lumen is actually a potentially favorable outcome and does not require prevention in the acute phase.
*Administer thrombolysis to restore flow in the true lumen*
- **Thrombolysis** is extremely dangerous in dissection as it may lead to uncontrollable **hemorrhage** or cardiac tamponade.
- Aortic dissection often mimics myocardial infarction, and administering thrombolytics in this setting is a life-threatening error.
Question 93: A 68-year-old woman with breast cancer on chemotherapy presents to the Emergency Department with a 6-hour history of fever, rigors, and feeling generally unwell. Her temperature is 38.7°C, heart rate 118 bpm, blood pressure 102/68 mmHg, respiratory rate 22/min, and oxygen saturation 96% on room air. Her white cell count is 1.2 × 10⁹/L with neutrophils 0.4 × 10⁹/L. What is the pathophysiological mechanism that makes this patient particularly vulnerable to severe infection?
A. Impaired cell-mediated immunity due to lymphocyte dysfunction
B. Reduced phagocytic capacity and impaired first-line defence against bacterial invasion (Correct Answer)
C. Complement deficiency leading to inadequate opsonization
D. Hypogammaglobulinaemia causing reduced antibody production
E. Splenic dysfunction resulting in susceptibility to encapsulated organisms
Explanation: ***Reduced phagocytic capacity and impaired first-line defence against bacterial invasion***
- The patient's **neutrophil count of 0.4 × 10⁹/L** defines **severe neutropenia**, a direct consequence of chemotherapy-induced **bone marrow suppression**.
- **Neutrophils** are crucial phagocytic cells, forming the **first line of defense** against bacterial infections; their severe depletion renders the body highly vulnerable to rapidly overwhelming sepsis.
*Impaired cell-mediated immunity due to lymphocyte dysfunction*
- While chemotherapy can impact **lymphocyte function**, leading to impaired **cell-mediated immunity**, this typically predisposes to **viral** and **fungal infections**.
- The acute, severe presentation of fever and rigors in profound neutropenia is overwhelmingly due to the lack of **neutrophils** to combat bacterial invaders.
*Complement deficiency leading to inadequate opsonization*
- **Complement deficiencies** are rare primary immunodeficiencies and are not a typical acute effect of standard breast cancer chemotherapy.
- Even if complement were deficient, the most critical issue in this patient is the absence of **neutrophils**
*Hypogammaglobulinaemia causing reduced antibody production*
- **Hypogammaglobulinaemia** typically results from **B-cell dysfunction** or loss, often seen in hematological malignancies or specific immunodeficiency syndromes.
- While it increases susceptibility to infections, particularly with **encapsulated bacteria**, it is not the primary mechanism behind acute, life-threatening **febrile neutropenia** from cytotoxic chemotherapy.
*Splenic dysfunction resulting in susceptibility to encapsulated organisms*
- **Splenic dysfunction** (e.g., asplenia) primarily increases vulnerability to infections by **encapsulated bacteria** like *Streptococcus pneumoniae* or *Haemophilus influenzae*.
- This patient's susceptibility stems from widespread **myelosuppression** affecting neutrophil production in the bone marrow, not a direct impact on splenic function.
Question 94: A 52-year-old man attends the Emergency Department following a syncopal episode while exercising. His father died suddenly aged 48. On examination, he has a jerky carotid pulse and a systolic murmur that increases with Valsalva manoeuvre. His ECG shows left ventricular hypertrophy with deep T-wave inversions. What is the underlying mechanism causing his syncope?
A. Intermittent complete heart block causing bradycardia
B. Fixed obstruction to left ventricular outflow reducing cardiac output during exercise (Correct Answer)
C. Vasovagal response triggered by physical exertion
D. Acute reduction in preload due to dehydration
E. Ventricular arrhythmia secondary to myocardial ischaemia
Explanation: ***Fixed obstruction to left ventricular outflow reducing cardiac output during exercise*** - The patient's presentation with **exertional syncope**, a **family history of sudden cardiac death**, **jerky carotid pulse**, **systolic murmur that increases with Valsalva**, and **ECG showing left ventricular hypertrophy with deep T-wave inversions** are classic features of **Hypertrophic Obstructive Cardiomyopathy (HOCM)**. - In HOCM, increased contractility and heart rate during exercise exacerbate the **dynamic left ventricular outflow tract (LVOT) obstruction**, leading to a sudden decrease in **cardiac output** and subsequent syncope. *Intermittent complete heart block causing bradycardia* - While conduction abnormalities can occur, this option does not explain the characteristic **systolic murmur that increases with Valsalva manoeuvre** or the **jerky carotid pulse**. - Syncope from **complete heart block** is primarily due to profound bradycardia, which is not the primary mechanism suggested by the specific physical examination findings of outflow obstruction. *Vasovagal response triggered by physical exertion* - **Vasovagal syncope** typically occurs after exertion or with emotional stress, not usually *during* intense exercise with these specific cardiac findings. - This diagnosis fails to account for the striking **family history of sudden death**, **left ventricular hypertrophy** on ECG, and the classic **murmur characteristics**. *Acute reduction in preload due to dehydration* - While a reduction in **preload** (e.g., from dehydration) can indeed worsen the **LVOT obstruction** in HOCM by reducing left ventricular volume, it is the resulting mechanical obstruction itself that causes syncope, not solely the dehydration. - This option does not explain the full clinical picture, including the **ECG findings** of hypertrophy and deep T-wave inversions, or the strong **family history**. *Ventricular arrhythmia secondary to myocardial ischaemia* - **Ventricular arrhythmias** are a significant risk in HOCM and a cause of sudden death, but the *primary* mechanism for exertional syncope, as evidenced by the **jerky carotid pulse** and the **Valsalva-responsive murmur**, points strongly to **mechanical outflow tract obstruction**. - While ischaemia can occur and trigger arrhythmias, the direct physical findings described are more indicative of the obstructive physiology as the initial cause of syncope during exercise.
Question 95: A 36-year-old man presents to the Emergency Department with 3 hours of central chest pain. His ECG shows ST-segment elevation in leads II, III, and aVF. He has a blood pressure of 145/90 mmHg and heart rate of 92 bpm. Primary percutaneous coronary intervention (PCI) is available but will take 90 minutes to organize. What is the most appropriate immediate management?
A. Wait for primary PCI as it will be within 120 minutes (Correct Answer)
B. Administer thrombolysis immediately
C. Arrange urgent coronary artery bypass grafting
D. Perform diagnostic coronary angiography only
E. Administer glycoprotein IIb/IIIa inhibitor and observe
Explanation: ***Wait for primary PCI as it will be within 120 minutes***
- For patients presenting with **ST-elevation myocardial infarction (STEMI)**, primary **percutaneous coronary intervention (PCI)** is the gold standard if it can be performed within **90 minutes** of first medical contact or **120 minutes** from ECG diagnosis.
- With PCI available in 90 minutes, it falls within this critical window, offering superior outcomes compared to pharmacologic reperfusion and minimizing time to myocardial salvage.
*Administer thrombolysis immediately*
- **Thrombolysis** (fibrinolysis) is indicated for STEMI only when primary PCI cannot be delivered within the recommended **120-minute window** from diagnosis.
- Administering thrombolysis when PCI is readily available within 90 minutes would unnecessarily expose the patient to increased risks of **major bleeding** and **intracranial hemorrhage** without providing additional benefit.
*Arrange urgent coronary artery bypass grafting*
- **Coronary artery bypass grafting (CABG)** is generally reserved for patients with complex coronary anatomy (e.g., left main or multi-vessel disease unsuitable for PCI) or specific mechanical complications of MI.
- It is not the first-line reperfusion strategy for an uncomplicated acute STEMI, as it is a more invasive procedure with a longer time to reperfusion compared to primary PCI.
*Perform diagnostic coronary angiography only*
- For **STEMI**, the primary goal is immediate **reperfusion** of the occluded coronary artery, not merely diagnosis.
- Performing only diagnostic angiography without proceeding to angioplasty and stenting would delay crucial revascularization, leading to continued **myocardial necrosis** and worsened prognosis.
*Administer glycoprotein IIb/IIIa inhibitor and observe*
- **Glycoprotein IIb/IIIa inhibitors** are powerful antiplatelet agents used as **adjunctive therapy** during primary PCI to prevent thrombus formation and improve microvascular flow.
- They are not a standalone reperfusion strategy; administering these inhibitors and observing without mechanical or pharmacological reperfusion would allow the occluded artery to remain blocked, causing ongoing **myocardial damage**.
Question 96: A 43-year-old woman is admitted with suspected sepsis. Her blood pressure is 88/52 mmHg despite 30 ml/kg fluid resuscitation. Her lactate is 4.2 mmol/L. She requires noradrenaline infusion to maintain mean arterial pressure above 65 mmHg. According to the Surviving Sepsis Campaign guidelines, what is the initial target mean arterial pressure in the first hour of managing this patient?
A. 55 mmHg
B. 60 mmHg
C. 65 mmHg (Correct Answer)
D. 70 mmHg
E. 75 mmHg
Explanation: ***65 mmHg***- According to the **Surviving Sepsis Campaign guidelines**, the initial target **Mean Arterial Pressure (MAP)** for patients in **septic shock** requiring vasopressors is **65 mmHg**.- This target is crucial for ensuring adequate **organ perfusion** and minimizing the risks associated with excessive **vasopressor** use.*55 mmHg*- A MAP of **55 mmHg** is generally considered too low to maintain sufficient **organ perfusion pressure**, especially in conditions like septic shock.- Targeting this level significantly increases the risk of **tissue hypoxia** and acute **organ dysfunction**, particularly in critical organs like the kidneys and brain.*60 mmHg*- While closer to the recommended target, a MAP of **60 mmHg** still falls below the **65 mmHg** threshold established by evidence-based guidelines for septic shock.- Sustaining MAP below the guideline target can lead to inadequate **microcirculatory flow**, exacerbating **lactic acidosis** and worsening patient outcomes.*70 mmHg*- While a MAP of **70 mmHg** may be achieved during treatment, it is not the **initial minimum target** set by the Surviving Sepsis Campaign guidelines.- Routinely aiming for higher targets like **70 mmHg** initially has not shown significant additional mortality benefit over **65 mmHg** in the general septic population and may increase vasopressor side effects.*75 mmHg*- A target MAP of **75 mmHg** is generally reserved for specific patient populations, such as those with a history of **chronic hypertension**, where higher pressures are needed for adequate organ perfusion.- In the absence of such comorbidities, routinely aiming for **75 mmHg** in septic shock can lead to increased **vasopressor** doses, potentially causing more adverse effects like **tachyarrhythmias** or **myocardial ischemia**.
Question 97: A 69-year-old woman presents to the Emergency Department with a 6-hour history of severe abdominal pain and vomiting. She has a history of atrial fibrillation but stopped taking her warfarin 3 months ago due to recurrent epistaxis. On examination, she has generalised abdominal tenderness with guarding but the degree of peritonism seems disproportionate to the mild tenderness on palpation. Her observations show: temperature 37.2°C, heart rate 110 bpm (irregularly irregular), blood pressure 135/80 mmHg. Blood tests reveal: WCC 16.8 × 10⁹/L, lactate 4.8 mmol/L, amylase 98 U/L (normal). An erect chest X-ray shows no free air under the diaphragm. What is the most likely diagnosis?
A. Perforated peptic ulcer
B. Acute mesenteric ischaemia (Correct Answer)
C. Acute pancreatitis
D. Ruptured abdominal aortic aneurysm
E. Sigmoid volvulus
Explanation: ***Acute mesenteric ischaemia***
- The presence of severe abdominal pain and vomiting in a patient with **atrial fibrillation** who stopped **warfarin** strongly suggests an embolic event to the mesenteric arteries.
- The key clinical clue is **"pain out of proportion to clinical findings"** with generalised abdominal tenderness but mild peritonism, along with an elevated **lactate** indicating bowel ischaemia.
*Perforated peptic ulcer*
- Typically presents with **sudden-onset, severe, generalised abdominal pain** and a **rigid abdomen** due to chemical peritonitis.
- A crucial diagnostic sign is the presence of **free air under the diaphragm** on an erect chest X-ray, which was absent in this patient.
*Acute pancreatitis*
- Usually presents with severe epigastric pain often radiating to the **back**, nausea, and vomiting.
- The diagnosis is largely excluded in this case by the **normal serum amylase** level, which would typically be significantly elevated.
*Ruptured abdominal aortic aneurysm*
- Characteristically presents with severe abdominal or back pain, **hypotension**, and a **pulsatile abdominal mass**.
- This patient is hemodynamically stable with a blood pressure of 135/80 mmHg, making an acute rupture less likely.
*Sigmoid volvulus*
- Typically presents with progressive **abdominal distension**, obstipation, and colicky abdominal pain, often in elderly or bed-bound patients.
- This acute presentation with disproportionate pain and elevated lactate is not typical for a sigmoid volvulus, which is usually diagnosed with characteristic imaging like a **"coffee bean" sign**.
Question 98: A 34-year-old man collapses during competitive squash. Witnesses report he suddenly fell to the ground without warning. Cardiopulmonary resuscitation was started immediately and an automated external defibrillator delivered one shock before paramedics arrived. Return of spontaneous circulation was achieved. He is now unconscious but breathing spontaneously with a GCS of 6 (E1, V1, M4). His blood pressure is 110/70 mmHg, heart rate 95 bpm (sinus rhythm on monitor), temperature 36.8°C. He has no significant past medical history. His post-resuscitation ECG shows normal sinus rhythm with deep T wave inversion in the lateral leads and prominent Q waves in leads V1-V3. What is the single most important investigation to identify the underlying cause of his cardiac arrest?
A. Urgent coronary angiography
B. Transthoracic echocardiography (Correct Answer)
C. CT head to exclude intracranial pathology
D. Toxicology screen for recreational drugs
E. Cardiac MRI
Explanation: ***Transthoracic echocardiography***- The patient's presentation (collapse during competitive squash, young age, specific ECG findings of **deep lateral T-wave inversion** and **prominent Q waves in V1-V3**) is highly suggestive of **Hypertrophic Cardiomyopathy (HCM)**.- It is the most appropriate initial investigation to visualize **asymmetric septal hypertrophy**, systolic anterior motion of the mitral valve, and **left ventricular outflow tract obstruction**, which are characteristic features of HCM.*Urgent coronary angiography*- While essential for diagnosing **acute coronary syndrome (ACS)**, a 34-year-old with no cardiac risk factors and specific ECG findings makes ACS a less likely primary diagnosis.- The described ECG pattern is more indicative of an underlying **structural heart disease** like HCM rather than typical myocardial ischemia.*CT head to exclude intracranial pathology*- Although **intracranial pathology** can cause collapse, the presence of specific post-resuscitation **ECG abnormalities** strongly points towards a primary cardiac etiology.- The priority in this scenario is to investigate the highly suspected cardiac cause before considering a less likely neurological trigger for the cardiac arrest.*Toxicology screen for recreational drugs*- While certain **recreational drugs** can trigger arrhythmias and cardiac arrest, the context of collapse during intense physical exertion suggests an underlying **exercise-induced cardiac condition**.- This investigation would be supplementary but not the most important single investigation to identify the *structural* cause of cardiac arrest indicated by the ECG and clinical scenario.*Cardiac MRI*- **Cardiac MRI** is the **gold standard** for detailed morphological and tissue characterization of cardiomyopathies, offering superior resolution for assessing hypertrophy and fibrosis.- However, it is not practical or feasible as the **immediate first-line investigation** in an unstable, recently resuscitated, unconscious patient, compared to a rapidly performed bedside echocardiogram.
Question 99: A 57-year-old man presents with central chest pain lasting 3 hours. His initial ECG shows ST depression of 1.5 mm in leads V4-V6 and T wave inversion in leads I, aVL, V5, and V6. His high-sensitivity troponin I at presentation is 45 ng/L (normal <16 ng/L). He has a history of hypertension and is a current smoker. A repeat troponin 3 hours later is 152 ng/L. His GRACE score is calculated as 142. Based on current guidelines, what is the most appropriate timing for invasive coronary angiography?
A. Immediate angiography within 2 hours
B. Early angiography within 24 hours (Correct Answer)
C. Angiography within 72 hours during this admission
D. Outpatient angiography if symptoms persist after discharge
E. Conservative management with medical therapy and non-invasive testing only
Explanation: ***Early angiography within 24 hours***- This patient presents with an **NSTEMI** confirmed by a significant rise in **high-sensitivity troponin** and dynamic **ECG changes** (ST depression, T wave inversion).- A **GRACE score of 142** places him in the **high-risk** category, recommending an **early invasive strategy** within 24 hours of presentation to reduce further myocardial injury.*Immediate angiography within 2 hours*- This timeframe is reserved for **very high-risk** NSTEMI/unstable angina patients experiencing **hemodynamic instability**, ongoing refractory chest pain, or life-threatening arrhythmias.- Although the patient has high-risk features, he is not described as having these **very high-risk** indicators requiring emergent intervention.*Angiography within 72 hours during this admission*- This timing is typically reserved for **intermediate-risk** patients, such as those with a **GRACE score between 109 and 140**, or with diabetes or renal impairment.- Given the patient's **GRACE score of 142**, which is above the intermediate-risk threshold, waiting 72 hours would delay optimal care.*Outpatient angiography if symptoms persist after discharge*- This approach is inappropriate for a patient presenting with an **acute coronary syndrome (NSTEMI)** and objective evidence of myocardial injury (troponin rise, ECG changes).- Such a patient requires **inpatient management** and prompt invasive evaluation, not discharge for outpatient follow-up.*Conservative management with medical therapy and non-invasive testing only*- Conservative management is generally considered for **low-risk** patients or those with **significant comorbidities** where invasive procedures carry excessive risk.- This patient has clear evidence of an **NSTEMI** and multiple risk factors, indicating a need for an invasive approach to identify and treat coronary artery disease.
Question 100: A 82-year-old man is brought to the Emergency Department from a nursing home with a 48-hour history of confusion and reduced oral intake. He has advanced dementia and multiple comorbidities. On examination, he is drowsy but rousable, with cool peripheries and prolonged capillary refill time >4 seconds. Observations show: temperature 36.2°C, heart rate 118 bpm, blood pressure 92/58 mmHg, respiratory rate 26/min, oxygen saturation 91% on room air. Blood tests reveal: lactate 5.8 mmol/L, creatinine 298 µmol/L (baseline 110 µmol/L), urea 24.5 mmol/L. His nursing home records indicate he has a DNACPR order in place and that his family wished for comfort-focused care. What is the most appropriate management approach?
A. Commence aggressive fluid resuscitation and arrange intensive care admission for possible vasopressor support
B. Provide symptomatic treatment only with subcutaneous fluids and withhold all active medical interventions
C. Discuss goals of care with family, then initiate appropriate treatment including intravenous fluids and antibiotics while respecting DNACPR status (Correct Answer)
D. Start palliative care measures immediately as DNACPR indicates end-of-life care pathway
E. Contact the ICU team to discuss prognosis before initiating any treatment
Explanation: ***Discuss goals of care with family, then initiate appropriate treatment including intravenous fluids and antibiotics while respecting DNACPR status***
- The patient presents with **septic shock** and **acute kidney injury**, which are potentially reversible with appropriate medical interventions like **IV fluids** and **antibiotics**.
- A **DNACPR** order only specifies against cardiopulmonary resuscitation and does not prohibit other treatments. Discussing **goals of care** with the family is crucial to align medical intervention with the patient's and family's wishes for **comfort-focused care** while treating acute, reversible conditions.
*Commence aggressive fluid resuscitation and arrange intensive care admission for possible vasopressor support*
- Given the patient's **advanced dementia**, **multiple comorbidities**, and family's wish for **comfort-focused care**, aggressive interventions like **intensive care admission** and **vasopressor support** may not align with the established ceiling of care.
- Such aggressive measures could lead to significant discomfort and may not improve long-term outcomes for a patient with such a complex medical history.
*Provide symptomatic treatment only with subcutaneous fluids and withhold all active medical interventions*
- Withholding all medical interventions, particularly for conditions like **septic shock** and **acute kidney injury**, is inappropriate as these are potentially reversible and can significantly impact the patient's immediate comfort and outcome.
- **Subcutaneous fluids** are typically insufficient to manage significant **hypovolemia** and **shock** associated with severe sepsis, which requires rapid **intravenous fluid** administration.
*Start palliative care measures immediately as DNACPR indicates end-of-life care pathway*
- A **DNACPR** order specifically refers to decisions regarding cardiopulmonary resuscitation and is **not synonymous** with an immediate transition to a purely **end-of-life care pathway**.
- The patient's acute deterioration due to **sepsis** is potentially treatable, and providing appropriate medical interventions could improve their comfort and quality of life in the short term.
*Contact the ICU team to discuss prognosis before initiating any treatment*
- Delaying the initiation of **time-critical treatments** such as **intravenous fluids** and **antibiotics** for septic shock can significantly worsen patient outcomes and increase mortality.
- While prognostic discussions are important, they should not precede immediate, life-saving interventions for a potentially reversible acute condition, especially when a **ceiling of care** needs to be established.
