Cardiology Practice Questions

Q: What is not true about infective endocarditis?

Rose spots. Infective Endocarditis (IE) is a multisystem disease characterized by infection of the endocardial surface, typically the heart valves. The clinical manifestations result from three processes: local destructive infection, septic embolization, and circulating immune complexes. **Why "Rose spots" is the correct answer:** Rose spots are small, blanching, rose-colored maculopapules found on the chest or abdomen. They are pathognomonic for **Enteric (Typhoid) Fever**, caused by *Salmonella typhi*. They are not a feature of infective endocarditis. **Analysis of incorrect options:** * **Hematuria:** This is a common finding in IE [1]. It can occur due to **embolic renal infarction** or, more characteristically, due to **immune-complex mediated glomerulonephritis** (a classic "immunological phenomenon" in Duke’s criteria). * **Roth spots:** These are retinal hemorrhages with central pale spots (white centers) caused by immune complex-mediated vasculitis [3]. They are one of the minor Duke’s criteria. * **Hemiplegia:** Neurological complications occur in up to 40% of cases [1]. Hemiplegia typically results from **septic emboli** originating from vegetations (especially from the mitral valve) leading to an ischemic stroke or a ruptured mycotic aneurysm. **High-Yield Clinical Pearls for NEET-PG:** * **Duke’s Criteria:** Remember that "Immunological phenomena" include Roth spots, Osler nodes, and Glomerulonephritis [3]. "Vascular phenomena" include Janeway lesions, Mycotic aneurysms, and Septic emboli. * **Osler Nodes vs. Janeway Lesions:** Osler nodes are **Painful** (Ouch!) and immunologic; Janeway lesions are **Painless** and embolic. * **Most common cause:** *Staphylococcus aureus* is now the most common cause of acute IE globally and in IV drug users [2]. *Viridans streptococci* remain common in subacute cases following dental procedures.

Q: What is the antihypertensive drug of choice for elderly patients with hypertension?

Calcium channel blocker or Diuretics. In elderly patients, hypertension is often characterized by **Isolated Systolic Hypertension (ISH)**. This occurs due to age-related arterial stiffening and reduced vascular compliance [1]. Pathophysiologically, the elderly tend to have **low-renin hypertension** and are more sensitive to salt intake. **Why Option D is Correct:** * **Calcium Channel Blockers (CCBs):** Long-acting dihydropyridines (e.g., Amlodipine) are highly effective in the elderly because they directly reduce peripheral vascular resistance, addressing the arterial stiffness characteristic of this age group [2]. * **Thiazide Diuretics:** These are particularly effective in low-renin, salt-sensitive hypertension [4]. Large-scale trials (like ALLHAT and SHEP) have consistently shown that diuretics and CCBs significantly reduce the risk of stroke and cardiovascular events in the elderly. **Why Other Options are Incorrect:** * **ACE Inhibitors (Options A, B, C):** While excellent for patients with diabetes or heart failure, ACEIs are generally less effective as monotherapy in the elderly due to the naturally low plasma renin levels found in this population. * **Beta-Blockers (Option B):** These are no longer considered first-line for uncomplicated hypertension in the elderly [3]. They are less effective at preventing strokes and can increase the risk of new-onset diabetes and bradycardia in older patients. **High-Yield NEET-PG Pearls:** * **JNC-8 Guidelines:** Recommend Thiazides or CCBs as first-line for the general non-black population (including elderly); however, for the **Black population**, Thiazides or CCBs are strictly preferred over ACEIs. * **Drug of Choice for ISH:** Long-acting Dihydropyridine CCBs [2]. * **Side Effect Note:** When using diuretics in the elderly, monitor for hyponatremia and hypokalemia, as they are more susceptible to electrolyte imbalances.

Q: A patient presents with normal angiography but exhibits severe hypokinesia of the left ventricular wall. Which of the following is the most likely diagnosis?

Takotsubo cardiomyopathy. The clinical scenario describes a classic presentation of **Takotsubo Cardiomyopathy**, also known as "Stress-induced Cardiomyopathy" or "Broken Heart Syndrome." **1. Why Takotsubo Cardiomyopathy is correct:** The hallmark of this condition is **transient systolic dysfunction** of the apical and/or mid-segments of the left ventricle, leading to a characteristic "ballooning" appearance (resembling a Japanese octopus trap). Crucially, patients present with symptoms mimicking an acute coronary syndrome (chest pain, ECG changes, elevated troponins), but **coronary angiography reveals normal or non-obstructive arteries**. It is typically triggered by intense emotional or physical stress, leading to a "catecholamine surge" that causes myocardial stunning. **2. Why the other options are incorrect:** * **HOCM:** Characterized by asymmetrical septal hypertrophy and dynamic outflow obstruction, not global or wall-specific hypokinesia. Angiography is not the primary diagnostic tool; echocardiography showing a thickened septum is key. * **Restrictive Cardiomyopathy:** Primarily a disorder of **diastolic function** (impaired filling) with relatively preserved systolic function (normal ejection fraction) in early stages. * **Dilated Cardiomyopathy (DCM):** While DCM involves ventricular hypokinesia and dilatation, it is usually a chronic, progressive condition [1]. In a NEET-PG context, the specific mention of "normal angiography" alongside acute severe hypokinesia is the classic "trigger" for a Takotsubo diagnosis. **Clinical Pearls for NEET-PG:** * **Demographics:** Most common in post-menopausal women. * **Echocardiography:** Shows "Apical Ballooning" with basal hyperkinesis. * **Prognosis:** Generally excellent, with ventricular function returning to normal within weeks. * **Key differentiator:** Symptoms of MI + Normal Coronaries + Stress Trigger = Takotsubo.

Q: A 23-year-old woman is diagnosed with mitral valve prolapse as seen on echocardiography for evaluation of a systolic murmur. Which of the following is most characteristic of mitral valve prolapse?

Usually a benign course. **Explanation:** **Mitral Valve Prolapse (MVP)**, also known as Barlow’s syndrome, is the most common valvular heart disease, characterized by the displacement of an abnormally thickened mitral valve leaflet into the left atrium during systole. **1. Why Option B is Correct:** The vast majority of patients with MVP are asymptomatic and follow a **benign clinical course**. Most cases are discovered incidentally during routine physical examination (finding a mid-systolic click [1]) or echocardiography. While complications can occur, they represent the exception rather than the rule for the general population with this condition. **2. Why Other Options are Incorrect:** * **Option A:** The characteristic murmur of MVP is a **late systolic murmur**, typically preceded by a **mid-systolic click [1]**. A pansystolic (holosystolic) murmur is more indicative of chronic, severe mitral regurgitation [2]. * **Option C & D:** While Sudden Cardiac Death (SCD) and Infective Endocarditis (IE) are recognized complications of MVP, they are **rare**. SCD occurs in <1% of cases annually, and the risk of IE is significantly lower than in other valvular pathologies, making these "characteristic" of the complications, but not the disease itself. **High-Yield Clinical Pearls for NEET-PG:** * **Auscultation:** Mid-systolic click [1] followed by a late systolic murmur. * **Dynamic Auscultation:** Maneuvers that decrease preload (Standing, Valsalva) make the click/murmur occur **earlier** in systole and often louder. Maneuvers that increase preload (Squatting) make it occur **later**. * **Association:** Strongly associated with connective tissue disorders like **Marfan syndrome** and Ehlers-Danlos syndrome. * **Pathology:** Characterized by **myxomatous degeneration** of the valve leaflets.

Q: Treatment of orthostatic hypotension includes all except:

Dopamine. Explanation: Orthostatic hypotension (OH) is defined as a sustained reduction in systolic blood pressure of at least 20 mmHg or diastolic blood pressure of at least 10 mmHg within 3 minutes of standing. The management strategy focuses on increasing intravascular volume and enhancing peripheral vascular resistance. **Why Dopamine is the Correct Answer (The Exception):** Dopamine is an intravenous inopressor used primarily in acute, hemodynamically unstable states like cardiogenic or septic shock. It is **not** a treatment for chronic orthostatic hypotension because it cannot be administered orally and has a very short half-life. Furthermore, at low doses, dopamine can cause vasodilation (via D1 receptors), which could theoretically worsen hypotension. **Analysis of Other Options:** * **High salt and fluid intake:** This is the first-line non-pharmacological intervention [1]. Increasing sodium (6–10 g/day) and fluid (2–3 L/day) expands the extracellular fluid volume to prevent postural collapse. * **Physical countermaneuvers:** Techniques such as leg crossing, muscle tensing, and squatting increase venous return (preload) to the heart, providing immediate symptomatic relief. * **Fludrocortisone:** This is the first-line pharmacological treatment [1]. It is a potent mineralocorticoid that promotes renal sodium reabsorption, thereby expanding plasma volume and sensitizing alpha-adrenergic receptors. **NEET-PG High-Yield Pearls:** 1. **Midodrine:** A selective alpha-1 agonist; it is the preferred drug when volume expansion alone is insufficient. 2. **Droxidopa:** A synthetic precursor of norepinephrine, recently approved for neurogenic OH. 3. **Pyridostigmine:** An acetylcholinesterase inhibitor that improves ganglionic transmission, helping to increase BP during standing without causing supine hypertension. 4. **Rule out "Reversible Causes":** Always check for drugs (diuretics, alpha-blockers) or dehydration before starting long-term therapy.

Q: Long-term secondary prevention following myocardial infarction is recommended with which one of the following drug classes?

Antiplatelet drugs. **Explanation:** **Why Antiplatelet drugs are correct:** Following a Myocardial Infarction (MI), the primary goal of secondary prevention is to prevent recurrent thrombotic events and stent thrombosis. **Antiplatelet therapy** (specifically Aspirin and P2Y12 inhibitors like Clopidogrel or Ticagrelor) is the cornerstone of this strategy. These drugs inhibit platelet aggregation, thereby preventing the formation of a white thrombus over a ruptured atherosclerotic plaque or within a coronary stent. Clinical trials have consistently shown that long-term antiplatelet therapy significantly reduces the risk of re-infarction and cardiovascular mortality. **Why the other options are incorrect:** * **Nitrates:** While excellent for acute symptomatic relief of angina (vasodilation), they do not improve long-term survival or prevent future MI. * **Amiodarone:** This is an anti-arrhythmic used for specific rhythm disturbances (like VT/VF). It is not used for routine secondary prevention due to its significant side-effect profile (pulmonary fibrosis, thyroid dysfunction) and lack of mortality benefit in post-MI patients without specific arrhythmias. * **Calcium Channel Antagonists (CCBs):** These are generally second-line agents. While they can be used for hypertension or angina, they do not offer the same robust secondary prevention benefits as Beta-blockers or ACE inhibitors. In fact, short-acting nifedipine is contraindicated post-MI. **High-Yield Clinical Pearls for NEET-PG:** * **Standard Post-MI "Mnemonic" (BAAS):** **B**eta-blockers, **A**CE inhibitors (or ARBs), **A**ntiplatelets (DAPT), and **S**tatins. These four classes are proven to reduce mortality. * **DAPT Duration:** Dual Antiplatelet Therapy (DAPT) is typically recommended for **12 months** post-ACS, regardless of whether a stent was placed. * **Aspirin Dose:** Low-dose aspirin (75–150 mg) is continued indefinitely for life.

Q: A 70-year-old man has isolated systolic hypertension. On examination, his blood pressure is 170/80 mmHg, and his heart and lungs are normal. He has no other medical conditions. For this patient, select the most appropriate medication to manage his high blood pressure.

Thiazides. ### Explanation **1. Why Thiazides are the Correct Choice:** Isolated Systolic Hypertension (ISH), defined as SBP ≥140 mmHg with DBP <90 mmHg, is common in elderly patients due to age-related arterial stiffness. Large-scale clinical trials (like SHEP and ALLHAT) have established **Thiazide-type diuretics** and **Long-acting Dihydropyridine Calcium Channel Blockers (CCBs)** as the first-line agents for ISH. Thiazides are preferred because they effectively reduce stroke risk, cardiovascular events, and mortality in this specific demographic. **2. Why the Other Options are Incorrect:** * **B. Spironolactone:** This is a potassium-sparing diuretic/aldosterone antagonist. It is generally used as an add-on therapy for resistant hypertension or in patients with heart failure (HFrEF). It is not a first-line agent for uncomplicated ISH. * **C. Clonidine:** A centrally acting alpha-2 agonist. It is associated with significant side effects like sedation, dry mouth, and the risk of rebound hypertension if discontinued abruptly. It is never a first-line choice for chronic hypertension management. * **D. Prazosin:** An alpha-1 blocker. While it can lower BP, it is primarily used in patients with concomitant Benign Prostatic Hyperplasia (BPH). It is associated with "first-dose hypotension" and is not recommended as monotherapy for hypertension. **3. NEET-PG High-Yield Pearls:** * **Definition of ISH:** SBP >140 and DBP <90 mmHg. * **First-line for Elderly/ISH:** Thiazides (e.g., Chlorthalidone) or CCBs (e.g., Amlodipine). * **Chlorthalidone vs. Hydrochlorothiazide:** Chlorthalidone is often preferred in exams/clinical practice due to its longer half-life and superior evidence in reducing CV events. * **Side Effects of Thiazides:** Hyper**G**lycemia, Hyper**L**ipidemia, Hyper**U**ricemia, and Hyper**C**alcemia (**GLUC**), but **Hypo**kalemia and **Hypo**natremia.

Question 1

A 30-year-old male, a labourer and chronic smoker and alcoholic, presents with acute chest pain, severe back pain radiating to the interscapular area. What is the most likely diagnosis?

Accepted Answer

Ruptured aortic aneurysm

Answer

Pericarditis

Answer

Tension pneumothorax

Answer

Myocardial infarction

Question 2

A 30-year-old man presents with significant nose bleeding, worsening headache over several days, and fatigue. Examination reveals markedly increased brachial artery pressure, decreased femoral pressure, and delayed femoral pulses. The patient shows no external signs of inflammation. Which of the following is the most likely diagnosis?

Accepted Answer

Coarctation of the aorta

Answer

Cor pulmonale

Answer

Dissecting aneurysm of the right common iliac artery

Answer

Obstruction of the superior vena cava

Question 3

What is not true about infective endocarditis?

Accepted Answer

Rose spots

Answer

Hematuria

Answer

Roth spots

Answer

Hemiplegia

Question 4

The 'square root sign' is an indication of which of the following conditions?

Accepted Answer

Constrictive pericarditis

Answer

Hypertrophic cardiomyopathy

Answer

Restrictive cardiomyopathy

Answer

None of the above

Question 5

What is the antihypertensive drug of choice for elderly patients with hypertension?

Accepted Answer

Calcium channel blocker or Diuretics

Answer

ACE inhibitor or Diuretics

Answer

ACE inhibitor or Beta blocker

Answer

ACE inhibitor or Calcium channel blocker

Question 6

A patient presents with normal angiography but exhibits severe hypokinesia of the left ventricular wall. Which of the following is the most likely diagnosis?

Accepted Answer

Takotsubo cardiomyopathy

Answer

Hypertrophic Obstructive Cardiomyopathy (HOCM)

Answer

Restrictive cardiomyopathy

Answer

Dilated cardiomyopathy (DCM)

Question 7

A 23-year-old woman is diagnosed with mitral valve prolapse as seen on echocardiography for evaluation of a systolic murmur. Which of the following is most characteristic of mitral valve prolapse?

Accepted Answer

Usually a benign course

Answer

A pansystolic murmur

Answer

Sudden death

Answer

Infective endocarditis

Question 8

Treatment of orthostatic hypotension includes all except:

Accepted Answer

Dopamine

Answer

High salt and fluid intake

Answer

Physical countermaneuvers

Answer

Fludrocortisone

Question 9

Long-term secondary prevention following myocardial infarction is recommended with which one of the following drug classes?

Accepted Answer

Antiplatelet drugs

Answer

Nitrates

Answer

Amiodarone

Answer

Calcium channel antagonists

Question 10

A 70-year-old man has isolated systolic hypertension. On examination, his blood pressure is 170/80 mmHg, and his heart and lungs are normal. He has no other medical conditions. For this patient, select the most appropriate medication to manage his high blood pressure.

Accepted Answer

Thiazides

Answer

Spironolactone

Answer

Clonidine

Answer

Prazosin

Cardiology — MCQs

Cardiology — MCQs

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