A 55-year-old man collapses suddenly during a work meeting. Colleagues report he became pale, lost consciousness without warning, and had brief jerking movements of his limbs lasting about 10 seconds. He regained consciousness within 30 seconds but appeared confused initially. He has a history of hypertension but no previous seizures or cardiac problems. On arrival to the Emergency Department, he is alert with normal observations. His ECG shows sinus rhythm with a QTc interval of 485 ms and T wave inversion in the anterior leads. What is the most likely diagnosis?
Q132
A 72-year-old woman with metastatic colorectal cancer on chemotherapy presents with a 36-hour history of fever, rigors, and diarrhoea. Observations: temperature 39.1°C, heart rate 118/min, blood pressure 92/58 mmHg, respiratory rate 24/min. Blood tests show: white cells 1.2 × 10⁹/L, neutrophils 0.3 × 10⁹/L, lactate 2.9 mmol/L. Blood cultures are taken. Which antibiotic regimen is most appropriate for initial empirical therapy?
Q133
A 29-year-old woman presents to the Emergency Department with sudden-onset severe chest pain radiating to her back. She appears distressed and is hypertensive (185/110 mmHg in right arm, 160/95 mmHg in left arm). She is tall with a Marfanoid appearance. Her ECG shows sinus tachycardia with no ischaemic changes. Chest X-ray shows a widened mediastinum. A CT aortic angiogram is arranged. While awaiting the scan, what is the most appropriate immediate medical management?
Q134
A 58-year-old man is admitted with suspected severe sepsis secondary to pneumonia. Initial observations: temperature 38.7°C, heart rate 105/min, blood pressure 110/70 mmHg, respiratory rate 26/min, oxygen saturations 93% on 4L/min via nasal cannulae. Blood tests show: lactate 2.8 mmol/L, creatinine 145 μmol/L (baseline 95 μmol/L), white cells 16.2 × 10⁹/L. He receives 1 litre of crystalloid over 1 hour. Repeat observations show: blood pressure 95/60 mmHg, heart rate 110/min. Repeat lactate is 3.5 mmol/L. What is the most appropriate next step?
Q135
A 42-year-old woman presents to the Emergency Department with a 4-hour history of severe pleuritic chest pain and breathlessness. She returned from Australia 5 days ago after a 24-hour flight. She is tachycardic (110/min), blood pressure 130/85 mmHg, respiratory rate 24/min, oxygen saturations 92% on air. Her two-level Wells score is 7 points. A CT pulmonary angiogram is arranged but cannot be performed immediately due to scanner availability. What is the most appropriate immediate management while awaiting imaging?
Q136
A 68-year-old man presents with central chest pain lasting 5 hours. His ECG shows 3 mm ST-segment elevation in leads II, III, and aVF with reciprocal ST depression in leads I and aVL. He is diagnosed with an inferior STEMI. During assessment, he suddenly develops bradycardia with a heart rate of 42/min and blood pressure drops to 85/50 mmHg. He becomes pale and clammy. His repeat ECG confirms sinus bradycardia. Which anatomical vessel occlusion is most likely responsible for the bradycardia in this clinical context?
Q137
A 35-year-old woman is brought to the Emergency Department after collapsing at a restaurant 15 minutes after starting her meal. She has generalized urticaria, facial swelling, and wheeze. Her blood pressure is 85/55 mmHg, heart rate 120/min, respiratory rate 28/min, oxygen saturations 91% on air. She is given intramuscular adrenaline 0.5 mg (1:1000). After initial improvement, her symptoms recur 45 minutes later with worsening bronchospasm and hypotension. What is the most appropriate next step in management?
Q138
A 78-year-old man presents to the Emergency Department after collapsing while standing at a bus stop. He reports feeling lightheaded before the event and regained consciousness within seconds. He has a history of ischaemic heart disease and takes bisoprolol, ramipril, and aspirin. On examination, his blood pressure is 135/80 mmHg lying and 105/65 mmHg standing. His 12-lead ECG shows sinus rhythm with a rate of 58/min and first-degree heart block (PR interval 240 ms). What is the most likely diagnosis?
Q139
A 52-year-old man presents to the Emergency Department with sudden-onset central chest pain radiating to the left arm, associated with sweating and nausea. His ECG shows sinus rhythm with ST-segment depression of 2 mm in leads V4-V6. Troponin I at presentation is 45 ng/L (normal <14 ng/L). He is pain-free after glyceryl trinitrate and morphine. What is the most appropriate immediate antiplatelet therapy according to current NICE guidelines?
Q140
A 65-year-old woman with type 2 diabetes presents to the Emergency Department with a 24-hour history of right flank pain, fever, and vomiting. On examination, she is confused, temperature 38.9°C, heart rate 115/min, blood pressure 95/60 mmHg, respiratory rate 24/min, oxygen saturations 94% on air. Blood tests show: lactate 3.2 mmol/L, creatinine 185 μmol/L (baseline 90 μmol/L), white cell count 18.5 × 10⁹/L. According to the Surviving Sepsis Campaign guidelines, what is the recommended timing for administration of intravenous antibiotics?
Acute Medical Presentations UK Medical PG Practice Questions and MCQs
Question 131: A 55-year-old man collapses suddenly during a work meeting. Colleagues report he became pale, lost consciousness without warning, and had brief jerking movements of his limbs lasting about 10 seconds. He regained consciousness within 30 seconds but appeared confused initially. He has a history of hypertension but no previous seizures or cardiac problems. On arrival to the Emergency Department, he is alert with normal observations. His ECG shows sinus rhythm with a QTc interval of 485 ms and T wave inversion in the anterior leads. What is the most likely diagnosis?
A. Generalized tonic-clonic seizure
B. Vasovagal syncope with convulsive movements
C. Cardiac syncope secondary to ventricular arrhythmia (Correct Answer)
D. Transient ischaemic attack
E. Hypoglycaemic episode
Explanation: ***Cardiac syncope secondary to ventricular arrhythmia***- The sudden loss of consciousness without a **prodrome**, combined with **brief convulsive movements** (convulsive syncope), is highly suggestive of cardiac syncope due to acute **cerebral hypoperfusion**.- The ECG finding of a **prolonged QTc interval (485 ms)** and T wave inversion significantly raises suspicion for an underlying **ventricular arrhythmia** (e.g., Torsades de Pointes) as the cause of syncope.*Generalized tonic-clonic seizure*- Primary generalized tonic-clonic seizures typically involve longer durations of motor activity (>30 seconds) and a more pronounced and prolonged **post-ictal period** of confusion or drowsiness.- The patient's **brief jerking (10 seconds)** and rapid return to consciousness within 30 seconds are uncharacteristic for a primary epileptic seizure.*Vasovagal syncope with convulsive movements*- Vasovagal syncope is generally preceded by a **prodrome** of autonomic symptoms like nausea, sweating, or dizziness, which was absent as the patient lost consciousness "without warning".- Although brief convulsive movements can occur, the presence of significant **ECG abnormalities** (prolonged QTc) points strongly towards a primary cardiac etiology rather than a benign reflex syncope.*Transient ischaemic attack*- A TIA typically presents with **focal neurological deficits** such as unilateral weakness, sensory loss, or speech disturbances, not a global loss of consciousness.- Isolated loss of consciousness is an **atypical presentation** for a TIA, especially without accompanying brainstem symptoms.*Hypoglycaemic episode*- Hypoglycemia usually presents with a more **gradual onset** of symptoms, often preceded by autonomic features (sweating, tremor) and progressive confusion.- Recovery from a severe hypoglycemic episode typically requires **glucose administration** and is not as rapid and spontaneous as described here.
Question 132: A 72-year-old woman with metastatic colorectal cancer on chemotherapy presents with a 36-hour history of fever, rigors, and diarrhoea. Observations: temperature 39.1°C, heart rate 118/min, blood pressure 92/58 mmHg, respiratory rate 24/min. Blood tests show: white cells 1.2 × 10⁹/L, neutrophils 0.3 × 10⁹/L, lactate 2.9 mmol/L. Blood cultures are taken. Which antibiotic regimen is most appropriate for initial empirical therapy?
A. Intravenous co-amoxiclav
B. Intravenous piperacillin-tazobactam (Correct Answer)
C. Oral ciprofloxacin and oral amoxicillin
D. Intravenous meropenem and vancomycin
E. Intravenous gentamicin alone
Explanation: ***Intravenous piperacillin-tazobactam***
- This patient presents with **neutropenic sepsis** (neutrophils < 0.5 × 10⁹/L and fever), which requires immediate broad-spectrum intravenous antibiotics that cover **Pseudomonas aeruginosa**.
- **Piperacillin-tazobactam** is the recommended first-line empirical monotherapy according to **NICE guidelines** due to its activity against Gram-negative and Gram-positive organisms.
*Intravenous co-amoxiclav*
- This antibiotic lacks sufficient coverage against **Pseudomonas aeruginosa**, which is a critical pathogen in neutropenic patients.
- It is not recommended for **empirical monotherapy** in a high-risk septic oncology patient.
*Oral ciprofloxacin and oral amoxicillin*
- Oral therapy is only considered in clinically stable, **low-risk neutropenic patients** (MASCC score ≥ 21), which does not apply to this septic user with **hypotension** and **hyperlactatemia**.
- Absorption can be unreliable in a patient with **diarrhoea** and potential gastrointestinal mucositis.
*Intravenous meropenem and vancomycin*
- These are considered **escalation therapies** reserved for patients not responding to first-line treatment or those with suspected **MRSA** or resistant Gram-negative infections.
- Starting with carbapenems as first-line therapy is avoided to prevent the development of **antimicrobial resistance** unless locally indicated.
*Intravenous gentamicin alone*
- **Gentamicin monotherapy** is inadequate as it provides poor coverage for Gram-positive organisms and certain anaerobes common in gut translocation.
- It carries a significant risk of **nephrotoxicity** and requires intensive monitoring, making it unsuitable as a sole agent in sepsis management.
Question 133: A 29-year-old woman presents to the Emergency Department with sudden-onset severe chest pain radiating to her back. She appears distressed and is hypertensive (185/110 mmHg in right arm, 160/95 mmHg in left arm). She is tall with a Marfanoid appearance. Her ECG shows sinus tachycardia with no ischaemic changes. Chest X-ray shows a widened mediastinum. A CT aortic angiogram is arranged. While awaiting the scan, what is the most appropriate immediate medical management?
A. Intravenous labetalol to reduce heart rate and blood pressure (Correct Answer)
B. Intravenous glyceryl trinitrate infusion to control blood pressure
C. Oral amlodipine for blood pressure control
D. Intravenous morphine only for pain management
E. High-dose aspirin and clopidogrel for suspected ACS
Explanation: ***Intravenous labetalol to reduce heart rate and blood pressure***
- In suspected **aortic dissection**, the primary goal is to reduce **aortic wall stress** by rapidly decreasing both the **heart rate (dP/dt)** and **blood pressure**.
- **Labetalol** is the first-line agent because its combined alpha- and beta-blocking properties effectively achieve a rapid target **systolic BP of 100-120 mmHg** and a **heart rate below 60 bpm**.
*Intravenous glyceryl trinitrate infusion to control blood pressure*
- Vasodilators like **GTN** used in isolation can cause **reflex tachycardia**, which increases the **shear stress** on the aortic wall and may worsen the dissection.
- If required for blood pressure control, they should only be administered **after** adequate **beta-blockade** has been established.
*Oral amlodipine for blood pressure control*
- **Aortic dissection** is a hypertensive emergency requiring rapid, titratable control of hemodynamics; **oral medications** are too slow-acting for this acute setting.
- Calcium channel blockers are not the first-line preference unless there are strict contraindications to **beta-blockers**.
*Intravenous morphine only for pain management*
- While **pain management** is a critical component of care to reduce sympathetic drive, it is insufficient as the **sole management** for a patient with severe hypertension and suspected dissection.
- Aggressive **hemodynamic control** must be initiated simultaneously to prevent aortic rupture or progression of the dissection.
*High-dose aspirin and clopidogrel for suspected ACS*
- Although ACS is a differential for chest pain, the **widened mediastinum** and **inter-arm BP discrepancy** strongly point toward **aortic dissection**, where antiplatelets are **contraindicated**.
- Initiating **dual antiplatelet therapy (DAPT)** significantly increases the risk of catastrophic bleeding if the patient requires emergency **aortic surgery**.
Question 134: A 58-year-old man is admitted with suspected severe sepsis secondary to pneumonia. Initial observations: temperature 38.7°C, heart rate 105/min, blood pressure 110/70 mmHg, respiratory rate 26/min, oxygen saturations 93% on 4L/min via nasal cannulae. Blood tests show: lactate 2.8 mmol/L, creatinine 145 μmol/L (baseline 95 μmol/L), white cells 16.2 × 10⁹/L. He receives 1 litre of crystalloid over 1 hour. Repeat observations show: blood pressure 95/60 mmHg, heart rate 110/min. Repeat lactate is 3.5 mmol/L. What is the most appropriate next step?
A. Commence dobutamine infusion
B. Give further 500 ml crystalloid bolus and reassess (Correct Answer)
C. Start noradrenaline infusion via central line
D. Start vasopressin infusion
E. Administer human albumin solution 500 ml
Explanation: ***Give further 500 ml crystalloid bolus and reassess*** - The patient is in **septic shock** and remains hypotensive with rising lactate after only 1 litre of fluid. Current guidelines recommend an initial **30 ml/kg crystalloid bolus**, which this patient has likely not fully received. - Further, smaller **crystalloid boluses** (e.g., 500 ml) are appropriate to optimize **preload** and tissue perfusion while continuously reassessing fluid responsiveness before escalating to vasopressors. *Start noradrenaline infusion via central line* - **Noradrenaline** is the first-choice vasopressor in **septic shock**, but it is generally initiated *after* adequate initial **fluid resuscitation** (typically 30 ml/kg) has failed to restore mean arterial pressure (MAP). - The patient's fluid status has not yet been fully optimized according to standard guidelines, making further fluid administration a priority before commencing vasopressors. *Start vasopressin infusion* - **Vasopressin** is considered a **second-line vasopressor** in septic shock, typically added to noradrenaline to achieve target MAP or to reduce the noradrenaline dose. - It is not the initial vasopressor of choice and should not be started before adequate fluid resuscitation and a first-line vasopressor like noradrenaline have been considered or initiated. *Commence dobutamine infusion* - **Dobutamine** is an **inotrope** primarily used when there is evidence of **myocardial dysfunction** or persistent signs of hypoperfusion despite adequate fluid resuscitation and vasopressor support. - There is no clear indication of cardiac dysfunction or a low cardiac output state in this scenario to justify starting an inotrope at this stage. *Administer human albumin solution 500 ml* - **Crystalloids** (e.g., 0.9% saline or Ringer's lactate) are the **first-line fluids** for initial resuscitation in septic shock due to their effectiveness and cost-efficiency. - While albumin can be used, it is typically reserved for patients requiring large volumes of crystalloids or in specific situations, and it is not recommended as the initial fluid choice over crystalloids.
Question 135: A 42-year-old woman presents to the Emergency Department with a 4-hour history of severe pleuritic chest pain and breathlessness. She returned from Australia 5 days ago after a 24-hour flight. She is tachycardic (110/min), blood pressure 130/85 mmHg, respiratory rate 24/min, oxygen saturations 92% on air. Her two-level Wells score is 7 points. A CT pulmonary angiogram is arranged but cannot be performed immediately due to scanner availability. What is the most appropriate immediate management while awaiting imaging?
A. Observe without anticoagulation until CTPA completed
B. Start low molecular weight heparin at treatment dose (Correct Answer)
C. Start warfarin 10 mg loading dose
D. Arrange ventilation-perfusion scan instead
E. Perform D-dimer test before any treatment
Explanation: ***Start low molecular weight heparin at treatment dose***- This patient presents with a high clinical probability of **pulmonary embolism (PE)**, evidenced by a **Wells score of 7**, recent **long-haul flight**, **tachycardia**, and **hypoxia**.- Immediate initiation of **therapeutic anticoagulation** with **low molecular weight heparin (LMWH)** is critical to prevent further clot propagation and adverse events, especially when diagnostic imaging is delayed. *Observe without anticoagulation until CTPA completed*- In a patient with a **high clinical probability** of PE and significant symptoms, delaying **anticoagulation** increases the risk of **clinical deterioration**, including cardiovascular collapse or sudden death.- Clinical guidelines mandate immediate empiric **anticoagulation** when there is a high suspicion for PE and diagnostic imaging is not immediately available or will be significantly delayed. *Start warfarin 10 mg loading dose*- **Warfarin** has a **delayed onset of action**, taking several days to achieve therapeutic effect, and is not suitable for immediate anticoagulation in acute PE.- It can also cause an initial **procoagulant state** by inhibiting proteins C and S, thus requiring **bridging** with a fast-acting anticoagulant like LMWH. *Arrange ventilation-perfusion scan instead*- While a **V/Q scan** is an alternative diagnostic test for PE, the immediate priority in this high-probability scenario is to initiate **anticoagulation** rather than changing the imaging modality.- **CTPA** remains the gold standard, and switching to a V/Q scan does not address the urgent need for treatment while awaiting diagnosis. *Perform D-dimer test before any treatment*- A **D-dimer test** is primarily used to **rule out PE** in patients with low or intermediate clinical probability (Wells score <4).- In a patient with a **high Wells score** (PE likely), a D-dimer test is not indicated as a positive result is expected and a negative result is insufficient to rule out PE, making immediate **anticoagulation** the priority.
Question 136: A 68-year-old man presents with central chest pain lasting 5 hours. His ECG shows 3 mm ST-segment elevation in leads II, III, and aVF with reciprocal ST depression in leads I and aVL. He is diagnosed with an inferior STEMI. During assessment, he suddenly develops bradycardia with a heart rate of 42/min and blood pressure drops to 85/50 mmHg. He becomes pale and clammy. His repeat ECG confirms sinus bradycardia. Which anatomical vessel occlusion is most likely responsible for the bradycardia in this clinical context?
A. Left anterior descending artery
B. Left circumflex artery
C. Right coronary artery (Correct Answer)
D. Left main stem artery
E. Diagonal branch of left anterior descending artery
Explanation: ***Right coronary artery*** - The **Right coronary artery (RCA)** is the most common source for the **posterior descending artery**, supplying the inferior wall (consistent with ST elevation in leads **II, III, and aVF**). - The RCA also supplies the **Sinoatrial (SA) node** (in 60% of cases) and the **Atrioventricular (AV) node** (in 90% of cases); ischemia to these nodes commonly leads to **sinus bradycardia** and hypotension. *Left anterior descending artery* - Occlusion of the **Left anterior descending (LAD) artery** typically causes an **anterior myocardial infarction**, with ST elevation in the **precordial leads (V1-V4)**. - The LAD primarily supplies the **anterior wall of the left ventricle** and the **anterior two-thirds of the interventricular septum**, not the inferior wall. *Left circumflex artery* - The **Left circumflex artery (LCx)** usually supplies the **lateral wall** (ST elevation in leads I, aVL, V5, V6) and can cause an inferior MI in a **left-dominant circulation**. - However, the specific presentation of **sinus bradycardia** is much more commonly associated with RCA occlusion due to its nodal supply. *Left main stem artery* - A **Left main stem artery** occlusion is a catastrophic event causing widespread ischemia with diffuse ST depression and **ST elevation in lead aVR**. - It would lead to massive **anterolateral** myocardial infarction and severe pump failure, not an isolated inferior STEMI with specific bradycardia. *Diagonal branch of left anterior descending artery* - Diagonal branches are typically responsible for supplying the **anterolateral** portion of the left ventricle. - Occlusion of a diagonal branch would result in ST elevation in **anterolateral leads**, such as V2-V6, I, or aVL, not in the inferior leads (II, III, aVF).
Question 137: A 35-year-old woman is brought to the Emergency Department after collapsing at a restaurant 15 minutes after starting her meal. She has generalized urticaria, facial swelling, and wheeze. Her blood pressure is 85/55 mmHg, heart rate 120/min, respiratory rate 28/min, oxygen saturations 91% on air. She is given intramuscular adrenaline 0.5 mg (1:1000). After initial improvement, her symptoms recur 45 minutes later with worsening bronchospasm and hypotension. What is the most appropriate next step in management?
A. Repeat intramuscular adrenaline 0.5 mg and observe (Correct Answer)
B. Start intravenous adrenaline infusion
C. Give hydrocortisone 200 mg intravenously only
D. Give chlorphenamine 10 mg intravenously only
E. Administer nebulized salbutamol and reassess
Explanation: ***Repeat intramuscular adrenaline 0.5 mg and observe***
- The patient is experiencing **biphasic anaphylaxis**, characterized by the recurrence of symptoms after initial resolution; the first-line treatment remains **Intramuscular (IM) Adrenaline**.
- IM adrenaline (1:1000) should be repeated every **5 minutes** if symptoms of airway, breathing, or circulation compromise persist or recur.
*Start intravenous adrenaline infusion*
- **Intravenous (IV) adrenaline** is reserved for **refractory anaphylaxis** that fails to respond to at least two appropriately administered IM doses.
- It requires **expert supervision** (e.g., intensive care or anesthesia) and continuous **cardiac monitoring** due to the high risk of arrhythmias.
*Give hydrocortisone 200 mg intravenously only*
- **Hydrocortisone** is an adjunctive therapy used to help prevent or shorten **protracted symptoms**, but it does not treat acute life-threatening features.
- It has a **slow onset of action** (several hours) and must never delay the administration of adrenaline in an acute crisis.
*Give chlorphenamine 10 mg intravenously only*
- **Chlorphenamine** is an H1-antihistamine used to manage **cutaneous symptoms** like urticaria and pruritus but does not stabilize blood pressure or bronchodilate.
- It is a **second-line treatment** and should never be used as monotherapy for life-threatening anaphylaxis.
*Administer nebulized salbutamol and reassess*
- **Nebulized salbutamol** can be used as an adjunct for persistent **bronchospasm**, but it does not address upper airway edema or **distributive shock**.
- Adrenaline is the priority because its **alpha-1 agonist** effects treat hypotension and its **beta-2 agonist** effects treat bronchospasm simultaneously.
Question 138: A 78-year-old man presents to the Emergency Department after collapsing while standing at a bus stop. He reports feeling lightheaded before the event and regained consciousness within seconds. He has a history of ischaemic heart disease and takes bisoprolol, ramipril, and aspirin. On examination, his blood pressure is 135/80 mmHg lying and 105/65 mmHg standing. His 12-lead ECG shows sinus rhythm with a rate of 58/min and first-degree heart block (PR interval 240 ms). What is the most likely diagnosis?
A. Vasovagal syncope
B. Orthostatic hypotension (Correct Answer)
C. Complete heart block
D. Arrhythmogenic syncope
E. Carotid sinus hypersensitivity
Explanation: ***Orthostatic hypotension***
- This diagnosis is confirmed by a drop in **systolic BP ≥20 mmHg** or **diastolic BP ≥10 mmHg** upon standing; he shows a 30/15 mmHg drop.
- His collapse while standing and prodromal lightheadedness are classic features, likely exacerbated by his medications like **bisoprolol** and **ramipril**.
*Vasovagal syncope*
- Usually preceded by specific **autonomic triggers** (pain, fear, or thermal stress) and a longer prodrome including nausea or pallor.
- While prolonged standing can trigger it, the objective evidence of a significant **postural BP drop** makes orthostatic hypotension the more definitive diagnosis.
*Complete heart block*
- This would present with a **slow, fixed pulse rate** and independent atrial and ventricular contractions (AV dissociation) on the ECG.
- The ECG here shows **sinus rhythm** with only a first-degree heart block, which does not typically cause syncope.
*Arrhythmogenic syncope*
- Often occurs suddenly without a prodrome or while the patient is **supine**, secondary to underlying structural heart disease or primary electrical issues.
- The clear association with **postural change** (standing at a bus stop) and the measured BP drop strongly point towards a mechanical circulatory cause rather than a primary arrhythmia.
*Carotid sinus hypersensitivity*
- Typically triggered by mechanical stimulation of the **carotid sinus**, such as turning the head, shaving, or wearing a tight collar.
- While it can occur in older males, the **postural BP findings** provide a more direct explanation for his syncope in the context of stand-up activity.
Question 139: A 52-year-old man presents to the Emergency Department with sudden-onset central chest pain radiating to the left arm, associated with sweating and nausea. His ECG shows sinus rhythm with ST-segment depression of 2 mm in leads V4-V6. Troponin I at presentation is 45 ng/L (normal <14 ng/L). He is pain-free after glyceryl trinitrate and morphine. What is the most appropriate immediate antiplatelet therapy according to current NICE guidelines?
A. Aspirin 300 mg loading dose only
B. Aspirin 300 mg plus clopidogrel 300 mg loading doses
C. Aspirin 300 mg plus ticagrelor 180 mg loading doses (Correct Answer)
D. Aspirin 300 mg plus prasugrel 60 mg loading doses
E. Aspirin 75 mg maintenance dose only
Explanation: ***Aspirin 300 mg plus ticagrelor 180 mg loading doses***- The patient's presentation with central chest pain, radiating to the left arm, sweating, nausea, **ST-segment depression** in V4-V6, and elevated **Troponin I** confirms a diagnosis of **NSTEMI**.- According to current **NICE guidelines** for NSTEMI, immediate dual antiplatelet therapy with a **300 mg loading dose of Aspirin** and a **180 mg loading dose of Ticagrelor** is the recommended initial antiplatelet strategy.*Aspirin 300 mg loading dose only*- **Monotherapy** with aspirin provides insufficient platelet inhibition for patients with **NSTEMI** and increases the risk of recurrent ischemic events.- **Dual antiplatelet therapy (DAPT)** is crucial to achieve more comprehensive platelet inhibition and improve clinical outcomes in acute coronary syndrome.*Aspirin 300 mg plus clopidogrel 300 mg loading doses*- **Clopidogrel** is a less potent P2Y12 inhibitor compared to ticagrelor and is typically reserved for patients with contraindications to ticagrelor or those with a high **bleeding risk**.- Evidence from trials like **PLATO** showed that **Ticagrelor** is superior to clopidogrel in reducing cardiovascular death and myocardial infarction in ACS patients.*Aspirin 300 mg plus prasugrel 60 mg loading doses*- **Prasugrel** is a potent P2Y12 inhibitor, but its use is generally initiated *after* coronary anatomy is known, particularly at the time of **Percutaneous Coronary Intervention (PCI)**, due to its increased risk of bleeding.- **NICE guidelines** prioritize **Ticagrelor** as the P2Y12 inhibitor for initial medical management of NSTEMI before definitive revascularization strategy is known.*Aspirin 75 mg maintenance dose only*- A **75 mg dose** of aspirin is a maintenance dose used for long-term prophylaxis and is inadequate for the acute management of **NSTEMI**.- An immediate **300 mg loading dose** of aspirin is essential to achieve rapid and extensive inhibition of platelet aggregation via **thromboxane A2**.
Question 140: A 65-year-old woman with type 2 diabetes presents to the Emergency Department with a 24-hour history of right flank pain, fever, and vomiting. On examination, she is confused, temperature 38.9°C, heart rate 115/min, blood pressure 95/60 mmHg, respiratory rate 24/min, oxygen saturations 94% on air. Blood tests show: lactate 3.2 mmol/L, creatinine 185 μmol/L (baseline 90 μmol/L), white cell count 18.5 × 10⁹/L. According to the Surviving Sepsis Campaign guidelines, what is the recommended timing for administration of intravenous antibiotics?
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 cultures are obtained, regardless of time
E. After imaging confirms the source of infection
Explanation: ***Within 1 hour of recognition of sepsis***- The **Surviving Sepsis Campaign** guidelines recommend that intravenous antimicrobials be initiated as soon as possible, ideally **within 1 hour** for both sepsis and septic shock.- This patient demonstrates **sepsis with organ dysfunction** (hypotension, confusion, and acute kidney injury), requiring immediate treatment to reduce the risk of mortality.*Within 3 hours of recognition of sepsis*- While older bundles mentioned a 3-hour window for some interventions, current guidelines emphasize the **1-hour bundle** to ensure rapid treatment of life-threatening infections.- Waiting 3 hours is associated with a higher risk of **progression to septic shock** and increased mortality rates in patients with clear organ dysfunction.*Within 6 hours of recognition of sepsis*- A 6-hour window is considered **delayed management** and is significantly outside the clinical standard for emergency sepsis care.- Delays of this magnitude are linked to significantly worse outcomes and **higher hospital mortality** compared to earlier intervention.*After blood cultures are obtained, regardless of time*- Although **blood cultures** should be obtained before starting antibiotics, this process must not cause a delay beyond the **one-hour target**.- If culture acquisition is difficult or delayed, **broad-spectrum antibiotics** must still be administered promptly to stabilize the patient.*After imaging confirms the source of infection*- Diagnostic imaging for suspected **pyelonephritis** (like CT or ultrasound) should be secondary to the stabilization and initiation of **empiric therapy**.- Relying on imaging confirmation first causes a dangerous delay in the **source control** and antimicrobial phase of sepsis bundles.
