A 67-year-old woman with rheumatoid arthritis on methotrexate presents to the Emergency Department with a 24-hour history of fever and rigors. Her temperature is 38.9°C, heart rate 118 bpm, blood pressure 102/68 mmHg, respiratory rate 24/min, and oxygen saturation 94% on room air. Blood tests show white cell count 18.2 × 10⁹/L, neutrophils 15.1 × 10⁹/L, lactate 3.2 mmol/L. Blood cultures are taken. According to the Surviving Sepsis Campaign guidelines, what is the recommended time frame for administration of intravenous antibiotics in this patient?
Q82
A 51-year-old woman presents to the Emergency Department with 90 minutes of central chest pain. Her ECG shows ST-segment depression in leads V3-V6 and her initial high-sensitivity troponin is 18 ng/L (normal <14 ng/L). She is pain-free following sublingual glyceryl trinitrate and morphine. A repeat troponin 3 hours later is 52 ng/L. Her GRACE score is 118. She has no high-risk features. When should she undergo coronary angiography according to current guidelines?
Q83
A 72-year-old man is admitted with community-acquired pneumonia and suspected sepsis. His observations are: temperature 38.9°C, blood pressure 108/65 mmHg, heart rate 105 bpm, respiratory rate 26/min, oxygen saturation 91% on room air. Blood results show: white cells 18.2 × 10⁹/L, CRP 245 mg/L, lactate 2.1 mmol/L, creatinine 145 μmol/L (baseline 95 μmol/L), albumin 28 g/L. His CURB-65 score is 3. Chest X-ray shows right lower lobe consolidation. He receives appropriate antibiotics and fluids. Six hours later, his blood pressure is 95/58 mmHg despite 2 litres of crystalloid. What factor in his presentation most strongly indicates the need for critical care input?
Q84
A 29-year-old woman is brought to the Emergency Department by ambulance following a bee sting 40 minutes ago. She was given intramuscular adrenaline 500 micrograms by paramedics 15 minutes ago. On arrival, she has widespread urticaria, lip swelling, blood pressure 92/55 mmHg, heart rate 115 bpm, respiratory rate 24/min with audible wheeze, and oxygen saturation 93% on 15L oxygen via non-rebreathing mask. Despite a further dose of intramuscular adrenaline and 2 litres of intravenous crystalloid, her blood pressure remains 88/52 mmHg. What is the most appropriate next step?
Q85
A 38-year-old previously healthy woman is brought to the Emergency Department following sudden collapse at a gym. Bystanders initiated CPR immediately and she had return of spontaneous circulation after one shock from an automated external defibrillator. She is now conscious but confused. Her ECG shows sinus rhythm with right bundle branch block and ST-segment elevation in V1-V3 with a coved morphology. Her echocardiogram shows structurally normal heart with good systolic function. What is the most likely diagnosis and appropriate next management step?
Q86
A 56-year-old man with insulin-dependent diabetes is brought to the Emergency Department with a 48-hour history of abdominal pain, vomiting, and increasing confusion. His observations are: temperature 37.2°C, blood pressure 95/58 mmHg, heart rate 118 bpm, respiratory rate 32/min, oxygen saturation 98% on room air. Blood tests show: glucose 28.4 mmol/L, pH 7.18, bicarbonate 12 mmol/L, ketones 5.8 mmol/L, sodium 128 mmol/L, potassium 5.8 mmol/L, urea 18.2 mmol/L, creatinine 185 μmol/L. What is the most important initial therapeutic intervention?
Q87
A 47-year-old woman presents to the Emergency Department with 6 hours of severe central chest pain. Her ECG shows 2 mm ST-segment elevation in leads V1-V4. Cardiac catheterization laboratory is immediately available. During preparation for primary PCI, she suddenly becomes hypotensive (BP 75/40 mmHg) and tachycardic (HR 135 bpm). On examination, her jugular venous pressure is markedly elevated, heart sounds are muffled, and she has cool peripheries. Urgent echocardiography would most likely show which finding?
Q88
A 64-year-old man is admitted to the Emergency Department with suspected sepsis secondary to cellulitis of his right leg. His initial qSOFA score is 2. Blood cultures are taken and intravenous antibiotics are prescribed. After 30 minutes, the nurse reports that the patient is now more confused, his blood pressure has dropped to 82/48 mmHg despite 1 litre of crystalloid, and his lactate is 3.8 mmol/L. What is the next most important step in his management?
Q89
A 31-year-old woman collapses at her desk at work. Witnesses report that she suddenly slumped forward, was unresponsive for approximately 15 seconds, then regained consciousness spontaneously. She had brief jerking movements of her limbs lasting 3-4 seconds. She now feels well but slightly embarrassed. Her observations are: blood pressure 118/72 mmHg, heart rate 78 bpm, temperature 36.8°C. She had not eaten breakfast this morning. What feature most strongly supports a diagnosis of syncope rather than seizure?
Q90
A 74-year-old man with known ischaemic heart disease presents with 4 hours of central chest pain. His ECG shows ST-segment depression in leads V2-V5 and his high-sensitivity troponin at presentation is 285 ng/L (normal <14 ng/L). He is haemodynamically stable. His GRACE score is calculated at 142. What does this GRACE score indicate regarding his management pathway?
Acute Medical Presentations UK Medical PG Practice Questions and MCQs
Question 81: A 67-year-old woman with rheumatoid arthritis on methotrexate presents to the Emergency Department with a 24-hour history of fever and rigors. Her temperature is 38.9°C, heart rate 118 bpm, blood pressure 102/68 mmHg, respiratory rate 24/min, and oxygen saturation 94% on room air. Blood tests show white cell count 18.2 × 10⁹/L, neutrophils 15.1 × 10⁹/L, lactate 3.2 mmol/L. Blood cultures are taken. According to the Surviving Sepsis Campaign guidelines, what is the recommended time frame for administration of intravenous antibiotics in this patient?
A. Within 1 hour of recognition of sepsis (Correct Answer)
B. Within 3 hours of recognition of sepsis
C. Within 6 hours of recognition of sepsis
D. After blood culture results are available
E. After identification of the source of infection
Explanation: ***Within 1 hour of recognition of sepsis***- This patient presents with clear signs of **sepsis** and features of **septic shock**, including fever, tachycardia, hypotension, tachypnea, and notably, an elevated **lactate level (3.2 mmol/L)**. The **Surviving Sepsis Campaign (SSC) guidelines** unequivocally recommend initiating intravenous antibiotics **within 1 hour** for patients with septic shock or high-risk sepsis.- Her immunocompromised state from methotrexate further increases the urgency, as delayed antibiotic administration in such patients significantly raises the risk of **mortality and adverse outcomes**.*Within 3 hours of recognition of sepsis*- While a 3-hour window was historically considered for some sepsis cases, current **Surviving Sepsis Campaign guidelines** emphasize a much stricter **1-hour target** for patients with suspected septic shock.- Delaying antibiotic administration to 3 hours in a patient with signs of **tissue hypoperfusion** (elevated lactate) and hemodynamic instability is associated with poorer patient outcomes.*Within 6 hours of recognition of sepsis*- Waiting 6 hours to administer antibiotics for a patient presenting with symptoms and laboratory findings consistent with **septic shock** is a critical error and significantly increases the risk of mortality.- The 6-hour time frame in older sepsis bundles typically referred to the completion of initial **resuscitation goals** (like fluid administration and vasopressor initiation), not the first dose of antibiotics.*After blood culture results are available*- Blood culture results typically take 24-48 hours to return; waiting for them would result in a **fatal delay** for a patient in septic shock, leading to rapid clinical deterioration.- While blood cultures should be obtained **before** antibiotic administration, this should not delay the start of antibiotics by more than **45-60 minutes**.*After identification of the source of infection*- It is crucial to initiate **empirical broad-spectrum antibiotics** immediately based on the clinical suspicion of sepsis, without waiting for the definitive identification of the infection source.- Delaying treatment until the source is confirmed risks the patient progressing to **refractory shock and multi-organ system failure**, worsening prognosis.
Question 82: A 51-year-old woman presents to the Emergency Department with 90 minutes of central chest pain. Her ECG shows ST-segment depression in leads V3-V6 and her initial high-sensitivity troponin is 18 ng/L (normal <14 ng/L). She is pain-free following sublingual glyceryl trinitrate and morphine. A repeat troponin 3 hours later is 52 ng/L. Her GRACE score is 118. She has no high-risk features. When should she undergo coronary angiography according to current guidelines?
A. Immediate angiography within 2 hours as she has elevated troponin
B. Urgent angiography within 24 hours due to ongoing ischaemia
C. Angiography within 72 hours as she has intermediate risk NSTE-ACS (Correct Answer)
D. Angiography before discharge as outpatient procedure is contraindicated
E. Conservative management with outpatient stress testing in 2-4 weeks
Explanation: ***Angiography within 72 hours as she has intermediate risk NSTE-ACS***
- The patient has confirmed **NSTE-ACS** based on cardiac chest pain, **ST-segment depression**, and a significant **troponin rise** (18 to 52 ng/L). Her **GRACE score of 118** places her in the **intermediate risk** category (typically 109-140).
- Current guidelines (ESC/NICE) recommend an invasive strategy with **coronary angiography within 72 hours** for hemodynamically stable patients at intermediate risk, in the absence of very high-risk features.
*Immediate angiography within 2 hours as she has elevated troponin*
- **Immediate angiography** (within 2 hours) is reserved for **very high-risk** features such as hemodynamic instability, refractory angina, life-threatening arrhythmias, or acute heart failure, none of which are present here.
- Although she has elevated troponin, her pain has resolved and she is stable, thus not meeting criteria for this immediate timeline.
*Urgent angiography within 24 hours due to ongoing ischaemia*
- **Urgent angiography** (within 24 hours) is indicated for **high-risk** patients, typically those with a **GRACE score >140** or evidence of dynamic ST-segment changes.
- This patient's GRACE score is 118, which is below the high-risk threshold for 24-hour intervention, and she is currently **pain-free**.
*Angiography before discharge as outpatient procedure is contraindicated*
- While angiography is indeed performed during the inpatient stay for NSTE-ACS, this option lacks the specific, evidence-based **timeframe** dictated by risk stratification guidelines.
- Simply stating "before discharge" is not precise enough for management decisions based on the patient's risk profile.
*Conservative management with outpatient stress testing in 2-4 weeks*
- **Conservative management** with outpatient stress testing is inappropriate for a patient with confirmed **NSTE-ACS/NSTEMI** (positive troponin and ECG changes).
- Patients with confirmed myocardial infarction require an inpatient invasive strategy, including angiography and potential revascularization, rather than delayed non-invasive testing.
Question 83: A 72-year-old man is admitted with community-acquired pneumonia and suspected sepsis. His observations are: temperature 38.9°C, blood pressure 108/65 mmHg, heart rate 105 bpm, respiratory rate 26/min, oxygen saturation 91% on room air. Blood results show: white cells 18.2 × 10⁹/L, CRP 245 mg/L, lactate 2.1 mmol/L, creatinine 145 μmol/L (baseline 95 μmol/L), albumin 28 g/L. His CURB-65 score is 3. Chest X-ray shows right lower lobe consolidation. He receives appropriate antibiotics and fluids. Six hours later, his blood pressure is 95/58 mmHg despite 2 litres of crystalloid. What factor in his presentation most strongly indicates the need for critical care input?
A. CURB-65 score of 3 indicating severe community-acquired pneumonia
B. Acute kidney injury with creatinine elevated above baseline
E. Elevated inflammatory markers indicating severe systemic response
Explanation: ***Persistent hypotension despite adequate fluid resuscitation suggesting septic shock***
- The patient's ongoing **hypotension** (BP 95/58 mmHg) despite receiving 2 litres of crystalloid indicates **fluid-refractory hypotension**, a defining characteristic of **septic shock**.
- This necessitates immediate **critical care admission** for initiation of **vasopressors** (e.g., noradrenaline), invasive monitoring, and advanced life support not available on a general ward.
*CURB-65 score of 3 indicating severe community-acquired pneumonia*
- A **CURB-65 score of 3** indicates severe pneumonia and high mortality risk, warranting close monitoring and consideration for ICU, but many such patients can be managed on a ward.
- While important for risk stratification, the development of **refractory shock** is a more urgent and direct clinical trigger for critical care transfer than the initial score alone.
*Acute kidney injury with creatinine elevated above baseline*
- The rise in **creatinine** (from 95 to 145 µmol/L) signifies **acute kidney injury (AKI)**, which is an end-organ dysfunction in sepsis and requires careful management.
- While a serious complication, AKI itself does not mandate critical care as strongly as **hemodynamic instability**, unless it progresses to require **renal replacement therapy**.
*Hypoxia requiring supplemental oxygen therapy*
- An **oxygen saturation of 91% on room air** indicates **hypoxemia**, necessitating supplemental oxygen, which is a common feature of severe pneumonia.
- Critical care input for respiratory compromise is typically required when there is a failure of basic oxygen therapy or a need for **advanced respiratory support** like non-invasive or invasive mechanical ventilation.
*Elevated inflammatory markers indicating severe systemic response*
- Elevated **white cell count** (18.2 × 10⁹/L) and **CRP** (245 mg/L) are robust indicators of a severe **systemic inflammatory response** and support the diagnosis of sepsis.
- These markers, while showing severity, do not directly dictate the need for critical care; rather, it is the resultant **organ dysfunction**, such as refractory hypotension, that necessitates advanced life support.
Question 84: A 29-year-old woman is brought to the Emergency Department by ambulance following a bee sting 40 minutes ago. She was given intramuscular adrenaline 500 micrograms by paramedics 15 minutes ago. On arrival, she has widespread urticaria, lip swelling, blood pressure 92/55 mmHg, heart rate 115 bpm, respiratory rate 24/min with audible wheeze, and oxygen saturation 93% on 15L oxygen via non-rebreathing mask. Despite a further dose of intramuscular adrenaline and 2 litres of intravenous crystalloid, her blood pressure remains 88/52 mmHg. What is the most appropriate next step?
A. Give further 500 ml boluses of crystalloid up to maximum 4 litres total
B. Commence intravenous adrenaline infusion via central venous catheter
C. Give intravenous glucagon 1-2 mg as patient may be on beta-blockers
D. Administer intravenous hydrocortisone 200 mg and chlorphenamine 10 mg
E. Commence intravenous adrenaline infusion via peripheral line with close monitoring (Correct Answer)
Explanation: ***Commence intravenous adrenaline infusion via peripheral line with close monitoring***
- The patient is experiencing **refractory anaphylaxis**, defined by persistent life-threatening symptoms despite two doses of **intramuscular (IM) adrenaline** and adequate fluid resuscitation.
- **Intravenous (IV) adrenaline infusion** is the next critical step. It should be started promptly via a **peripheral line** to avoid dangerous delays, even if a central line is eventually considered.
*Give further 500 ml boluses of crystalloid up to maximum 4 litres total*
- While initial fluid resuscitation is crucial, this patient remains severely hypotensive despite 2 litres of IV crystalloid, indicating the need for direct **vasopressor support**.
- Continuing fluid boluses alone without addressing the profound **vasodilation** and vascular permeability with adrenaline infusion is insufficient in refractory cases.
*Commence intravenous adrenaline infusion via central venous catheter*
- Although a **central venous catheter (CVC)** is the preferred route for long-term vasopressor administration, the time required to establish central access would cause critical **treatment delays** in this emergency.
- Current guidelines advocate for immediate administration of **IV adrenaline infusion** via a **peripheral line** in refractory anaphylaxis to stabilize the patient without delay.
*Give intravenous glucagon 1-2 mg as patient may be on beta-blockers*
- **Glucagon** is primarily considered for anaphylaxis in patients known to be on **beta-blockers**, as it bypasses beta-receptor blockade.
- There is no indication or history provided to suggest this patient is on beta-blockers, making this a premature and inappropriate primary intervention over adrenaline.
*Administer intravenous hydrocortisone 200 mg and chlorphenamine 10 mg*
- **Hydrocortisone** (corticosteroid) and **chlorphenamine** (antihistamine) are important **adjunctive therapies** for anaphylaxis.
- They are used to help manage symptoms like **urticaria** and reduce the risk of **biphasic reactions**, but they do not provide immediate treatment for severe hypotension or airway compromise and should not delay adrenaline administration.
Question 85: A 38-year-old previously healthy woman is brought to the Emergency Department following sudden collapse at a gym. Bystanders initiated CPR immediately and she had return of spontaneous circulation after one shock from an automated external defibrillator. She is now conscious but confused. Her ECG shows sinus rhythm with right bundle branch block and ST-segment elevation in V1-V3 with a coved morphology. Her echocardiogram shows structurally normal heart with good systolic function. What is the most likely diagnosis and appropriate next management step?
A. Brugada syndrome; arrange electrophysiological studies and consider implantable cardioverter-defibrillator (Correct Answer)
B. Anterior STEMI; arrange emergency coronary angiography with view to primary PCI
C. Arrhythmogenic right ventricular cardiomyopathy; commence beta-blockers and arrange cardiac MRI
D. Acute myocarditis; commence immunosuppression and arrange cardiac biopsy
E. Long QT syndrome; commence beta-blockers and arrange genetic testing
Explanation: ***Brugada syndrome; arrange electrophysiological studies and consider implantable cardioverter-defibrillator***- The ECG displays the classic **Type 1 Brugada pattern**, characterized by **coved ST-segment elevation** (≥2 mm) followed by a negative T-wave in leads **V1-V3**, appearing in the context of a **structurally normal heart**.- Since the patient survived an **aborted sudden cardiac death** (SCD), an **Implantable Cardioverter-Defibrillator (ICD)** is specifically indicated for secondary prevention against future ventricular arrhythmias.*Anterior STEMI; arrange emergency coronary angiography with view to primary PCI*- While **STEMI** presents with ST elevation, the **coved morphology** in right precordial leads without typical chest pain or segmental wall motion abnormalities on echo is more indicative of a channelopathy.- The sudden collapse during activity and immediate **VF/shock** in a young person with no cardiac risk factors points away from atherosclerotic coronary disease.*Arrhythmogenic right ventricular cardiomyopathy; commence beta-blockers and arrange cardiac MRI*- **ARVC** typically presents on an ECG with **T-wave inversions** in V1-V3 and the presence of an **epsilon wave**, which is not described here.- Echocardiography in ARVC would usually show **structural abnormalities** such as RV dilation or aneurysms, whereas this patient has a structurally normal heart.*Acute myocarditis; commence immunosuppression and arrange cardiac biopsy*- **Myocarditis** generally presents with a history of viral prodrome, chest pain, or **heart failure symptoms**, and is associated with systolic dysfunction on echocardiography.- The ECG in myocarditis may show diffuse ST-changes or conduction delays, but it does not typically mimic the specific **coved V1-V3 morphology** of Brugada syndrome.*Long QT syndrome; commence beta-blockers and arrange genetic testing*- **Long QT Syndrome (LQTS)** is characterized by a measurement of the **QTc interval** (typically >470-480ms), rather than specific ST-segment elevations in the right precordial leads.- While both are channelopathies leading to SCD, the management of LQTS initially focuses on **beta-blockers** (e.g., Nadolol), whereas Brugada syndrome management focuses on avoiding triggers and **ICD placement**.
Question 86: A 56-year-old man with insulin-dependent diabetes is brought to the Emergency Department with a 48-hour history of abdominal pain, vomiting, and increasing confusion. His observations are: temperature 37.2°C, blood pressure 95/58 mmHg, heart rate 118 bpm, respiratory rate 32/min, oxygen saturation 98% on room air. Blood tests show: glucose 28.4 mmol/L, pH 7.18, bicarbonate 12 mmol/L, ketones 5.8 mmol/L, sodium 128 mmol/L, potassium 5.8 mmol/L, urea 18.2 mmol/L, creatinine 185 μmol/L. What is the most important initial therapeutic intervention?
A. Give subcutaneous insulin lispro 10 units stat
B. Commence fixed-rate intravenous insulin infusion at 0.1 units/kg/hour
C. Administer rapid 1000 ml bolus of 0.9% sodium chloride (Correct Answer)
D. Give intravenous sodium bicarbonate to correct acidosis
E. Administer intravenous potassium chloride 40 mmol
Explanation: ***Administer rapid 1000 ml bolus of 0.9% sodium chloride***- The patient presents with **hypotension** (95/58 mmHg), **tachycardia** (118 bpm), and signs of poor perfusion (confusion, high urea/creatinine), indicating severe **hypovolemia** due to dehydration from DKA.- **Fluid resuscitation** with 0.9% sodium chloride is the most critical initial intervention to restore circulating volume, improve tissue perfusion, and stabilize hemodynamics before initiating insulin. *Commence fixed-rate intravenous insulin infusion at 0.1 units/kg/hour*- While crucial for DKA, **insulin therapy** should generally be initiated only after adequate **fluid resuscitation** has begun (typically after the first liter of fluid).- Starting insulin too early in a severely dehydrated patient can worsen **hypovolemia** by promoting further fluid shifts from the intravascular space into cells. *Give intravenous sodium bicarbonate to correct acidosis*- **Sodium bicarbonate** is rarely indicated in DKA and is usually reserved for severe, life-threatening acidosis with a pH less than **6.9**.- Routine use can lead to paradoxical **intracellular acidosis**, cerebral edema, and a precipitous drop in **potassium levels**. *Administer intravenous potassium chloride 40 mmol*- The patient currently has **hyperkalemia (5.8 mmol/L)**; therefore, administering additional potassium at this stage is contraindicated and could cause **cardiac arrhythmias**.- **Potassium replacement** is typically initiated only after serum potassium levels fall below **5.5 mmol/L** (or lower, depending on guidelines) as insulin therapy begins to drive potassium into cells. *Give subcutaneous insulin lispro 10 units stat*- **Subcutaneous insulin** is inappropriate for the initial management of severe DKA because its absorption is unpredictable in a dehydrated and poorly perfused patient.- Management requires a **fixed-rate intravenous insulin infusion (FRIII)** to ensure consistent delivery and rapid titration of insulin.
Question 87: A 47-year-old woman presents to the Emergency Department with 6 hours of severe central chest pain. Her ECG shows 2 mm ST-segment elevation in leads V1-V4. Cardiac catheterization laboratory is immediately available. During preparation for primary PCI, she suddenly becomes hypotensive (BP 75/40 mmHg) and tachycardic (HR 135 bpm). On examination, her jugular venous pressure is markedly elevated, heart sounds are muffled, and she has cool peripheries. Urgent echocardiography would most likely show which finding?
A. Acute severe mitral regurgitation with flail leaflet
B. Large pericardial effusion with diastolic collapse of right ventricle
C. Ventricular septal defect with left-to-right shunt (Correct Answer)
D. Severe left ventricular systolic dysfunction with ejection fraction <20%
E. Acute aortic dissection extending into the coronary ostia
Explanation: ***Ventricular septal defect with left-to-right shunt***- Sudden **hypotension** and **elevated JVP** following an **anterior STEMI** (V1-V4) suggest a mechanical complication such as **ventricular septal rupture (VSR)**.- VSR leads to acute **right heart failure** and systemic shock, appearing on an echocardiogram as a septal defect with a **left-to-right shunt**.*Acute severe mitral regurgitation with flail leaflet*- This complication typically follows an **inferior MI** due to rupture of the posteromedial **papillary muscle**.- Presentation usually involves **acute pulmonary edema** rather than isolated elevated JVP without respiratory crackles.*Large pericardial effusion with diastolic collapse of right ventricle*- While **Beck's triad** (hypotension, muffled heart sounds, elevated JVP) is present, **cardiac tamponade** usually follows free wall rupture, which is often rapidly fatal.- This typically occurs **3-5 days** post-MI rather than within the first 6 hours of a primary STEMI presentation.*Severe left ventricular systolic dysfunction with ejection fraction <20%*- Although **cardiogenic shock** from LV failure is common in large MIs, it does not typically present with the specific triad of **muffled heart sounds** and acute JVP elevation.- Isolated LV failure would primarily show signs of **pulmonary congestion** rather than the clinical picture of a mechanical shunt or tamponade.*Acute aortic dissection extending into the coronary ostia*- Aortic dissection can cause STEMI if it involves the **right coronary artery**, but it rarely involves the LAD (V1-V4 distribution) in this manner.- While it can cause **tamponade**, the primary presentation would likely involve **tearing chest pain** radiating to the back and unequal limb blood pressures.
Question 88: A 64-year-old man is admitted to the Emergency Department with suspected sepsis secondary to cellulitis of his right leg. His initial qSOFA score is 2. Blood cultures are taken and intravenous antibiotics are prescribed. After 30 minutes, the nurse reports that the patient is now more confused, his blood pressure has dropped to 82/48 mmHg despite 1 litre of crystalloid, and his lactate is 3.8 mmol/L. What is the next most important step in his management?
A. Commence noradrenaline infusion via peripheral cannula immediately
B. Arrange urgent central venous line insertion before starting vasopressors
C. Give a further rapid 500 ml crystalloid bolus and reassess (Correct Answer)
D. Transfer to intensive care unit before any further interventions
E. Obtain urgent lactate measurement in 1 hour to assess response
Explanation: ***Give a further rapid 500 ml crystalloid bolus and reassess***
- The patient's presentation with persistent **hypotension** (82/48 mmHg), new confusion, and a **lactate of 3.8 mmol/L** despite 1 liter of crystalloid confirms **septic shock**.
- Current guidelines for septic shock recommend an initial **30 ml/kg crystalloid bolus** within the first 3 hours; this patient has only received approximately 15 ml/kg (1 liter for an average 70 kg adult) and requires further fluid resuscitation.
*Commence noradrenaline infusion via peripheral cannula immediately*
- **Noradrenaline** is the first-line vasopressor for septic shock but should be started *after* adequate fluid resuscitation (i.e., the 30 ml/kg bolus) has failed to restore **mean arterial pressure (MAP)**.
- Initiating vasopressors prematurely without addressing potential **hypovolemia** can be less effective and may worsen **tissue perfusion**.
*Arrange urgent central venous line insertion before starting vasopressors*
- While a **central venous line** is preferred for prolonged vasopressor infusions due to less risk of extravasation, it should not delay life-saving interventions like fluid administration or immediate vasopressor initiation.
- In a critical situation, vasopressors can be started via a **large-bore peripheral cannula** temporarily if fluids are optimized and a central line is being prepared.
*Transfer to intensive care unit before any further interventions*
- Critical interventions for **septic shock**, such as rapid fluid administration and early vasopressor use, must be initiated immediately in the **Emergency Department** or current location.
- Delaying these time-sensitive treatments for a transfer to the **ICU** can significantly worsen patient outcomes and increase mortality.
*Obtain urgent lactate measurement in 1 hour to assess response*
- **Serial lactate** measurements are crucial for monitoring the patient's response to resuscitation and assessing the adequacy of tissue perfusion.
- However, this is a **monitoring tool**, not an active intervention, and the immediate priority is to treat the underlying shock and stabilize hemodynamics before waiting for further lab results.
Question 89: A 31-year-old woman collapses at her desk at work. Witnesses report that she suddenly slumped forward, was unresponsive for approximately 15 seconds, then regained consciousness spontaneously. She had brief jerking movements of her limbs lasting 3-4 seconds. She now feels well but slightly embarrassed. Her observations are: blood pressure 118/72 mmHg, heart rate 78 bpm, temperature 36.8°C. She had not eaten breakfast this morning. What feature most strongly supports a diagnosis of syncope rather than seizure?
A. The presence of brief myoclonic jerks during the episode
B. The very short duration of unconsciousness (15 seconds)
C. Rapid and complete recovery of consciousness without post-ictal confusion (Correct Answer)
D. The witnessed loss of consciousness while seated
E. The absence of tongue biting or urinary incontinence
Explanation: ***Rapid and complete recovery of consciousness without post-ictal confusion***
- The immediate and complete return to **baseline mental status** without a period of **confusion, drowsiness**, or **disorientation** is a classic distinguishing feature of **syncope**.
- In contrast, **generalized tonic-clonic seizures** are almost invariably followed by a **post-ictal state**, which can last minutes to hours and is characterized by confusion, fatigue, and headache.
*The presence of brief myoclonic jerks during the episode*
- **Brief myoclonic jerks** can occur in **convulsive syncope** due to prolonged **cerebral hypoperfusion**, making this feature less specific for differentiating syncope from seizure.
- These movements in syncope are typically **brief (<15 seconds)**, less organized, and generally occur later in the episode compared to the often immediate and sustained motor activity of a generalized seizure.
*The very short duration of unconsciousness (15 seconds)*
- While typical **syncope** involves a brief loss of consciousness, some **seizure types**, such as absence seizures or brief complex partial seizures, can also have very short durations of unresponsiveness.
- Therefore, the **duration of unconsciousness** alone is not as reliable a distinguishing feature as the **post-event recovery phase**.
*The witnessed loss of consciousness while seated*
- Syncope, particularly **vasovagal syncope**, can occur while **seated or standing** due to impaired **venous return** or **autonomic dysfunction**.
- However, seizures can also occur in any body position, including seated, making this particular circumstance less specific for **syncope** over **seizure**.
*The absence of tongue biting or urinary incontinence*
- While **tongue biting** (especially lateral) and **urinary incontinence** are often associated with **generalized tonic-clonic seizures**, their absence does not definitively rule out a seizure or confirm syncope.
- These features are not universally present in all seizures, and conversely, urinary incontinence can occasionally occur during **syncope** (e.g., if the bladder is full).
Question 90: A 74-year-old man with known ischaemic heart disease presents with 4 hours of central chest pain. His ECG shows ST-segment depression in leads V2-V5 and his high-sensitivity troponin at presentation is 285 ng/L (normal <14 ng/L). He is haemodynamically stable. His GRACE score is calculated at 142. What does this GRACE score indicate regarding his management pathway?
A. Low risk; discharge with outpatient cardiology follow-up within 6 weeks
B. Intermediate risk; admit for medical management and consider angiography within 72 hours
C. High risk; urgent coronary angiography within 24 hours is indicated (Correct Answer)
D. Very high risk; immediate coronary angiography within 2 hours is indicated
E. Low risk; suitable for early discharge after rule-out protocol
Explanation: ***High risk; urgent coronary angiography within 24 hours is indicated*** - A **GRACE score >140** classifies a patient as high risk for future cardiovascular events, necessitating an **early invasive strategy** within 24 hours according to NICE and ESC guidelines. - This patient presents with **NSTEMI** (elevated troponin and ST-depression), and the high-risk score dictates timely intervention to prevent further myocardial damage. *Low risk; discharge with outpatient cardiology follow-up within 6 weeks* - A **GRACE score <109** is generally required to categorize a patient as low risk, making simplified outpatient management inappropriate for this patient. - Outpatient follow-up is not suitable for a patient with an **elevated troponin** of 285 ng/L, which confirms acute myocardial injury. *Intermediate risk; admit for medical management and consider angiography within 72 hours* - Intermediate risk is defined by a **GRACE score between 109 and 140**; this patient exceeds that threshold with a score of 142. - While medical management is initiated for all, the **24-hour window** for angiography is preferred over the 72-hour window when the score is >140. *Very high risk; immediate coronary angiography within 2 hours is indicated* - Immediate angiography (<2 hours) is reserved for **hemodynamically unstable** patients, those with refractory pain, or life-threatening arrhythmias. - This patient is currently **hemodynamically stable** and does not meet the criteria for emergency "very high risk" categorization. *Low risk; suitable for early discharge after rule-out protocol* - Early discharge after a rule-out protocol only applies to patients with **negative serial troponins** and a low clinical risk profile. - The significantly **elevated high-sensitivity troponin** (285 ng/L) and ST-depression automatically exclude this patient from a rule-out pathway.
