Cardiology Practice Questions

Q: All of the following are seen in Coarctation of the Aorta, except?

Boot shaped heart. **Explanation:** **Coarctation of the Aorta (CoA)** is a localized narrowing of the aorta, typically occurring near the insertion of the ductus arteriosus (post-ductal). **Why "Boot-shaped heart" is the correct answer:** The **"Boot-shaped heart" (Coeur en sabot)** is the classic radiological finding in **Tetralogy of Fallot (TOF)**, not Coarctation [1]. It is caused by right ventricular hypertrophy (RVH) elevating the cardiac apex, combined with a concave pulmonary segment due to pulmonary stenosis. In contrast, the classic radiological sign for Coarctation is the **"3" sign** on X-ray (pre- and post-stenotic dilatation) and **rib notching** (due to collateral flow through intercostal arteries). **Analysis of other options:** * **A. Diminution of femoral pulsations:** This is a hallmark clinical sign. The narrowing causes high blood pressure in the upper extremities and low pressure/delayed pulses in the lower extremities (**radio-femoral delay**) [2]. * **B. High incidence of associated Bicuspid aortic valve:** This is the most common associated cardiac anomaly, seen in approximately **50-80%** of patients with CoA. * **C. Left ventricular Hypertrophy (LVH):** Because the heart must pump against the high resistance of the narrowed aorta (increased afterload), the left ventricle undergoes compensatory hypertrophy. **High-Yield Clinical Pearls for NEET-PG:** * **Turner Syndrome:** Strongly associated with CoA (approx. 10-15% of cases) [2]. * **Rib Notching:** Usually involves the 3rd to 8th ribs; it never involves the 1st and 2nd ribs because their intercostal arteries do not bypass the obstruction. * **Physical Exam:** Look for a systolic murmur heard best over the left interscapular area. * **Complications:** Berry aneurysms (Circle of Willis), infective endocarditis, and premature coronary artery disease.

Q: Which congenital heart disease is associated with pre-excitation?

Ebstein's Anomaly. Explanation: Ebstein’s Anomaly is the correct answer because it has a unique anatomical and electrical association with Wolff-Parkinson-White (WPW) syndrome. In Ebstein’s anomaly, there is a failure of delamination of the tricuspid valve leaflets, leading to their downward displacement into the right ventricle ("atrialization" of the RV). This structural deformity is frequently accompanied by accessory pathways (bundles of Kent) that bypass the AV node, leading to ventricular pre-excitation [2]. Approximately 10–25% of patients with Ebstein’s anomaly have these pathways, often involving multiple routes on the right side of the heart. Analysis of Incorrect Options: * Atrial Septal Defect (ASD): While ASD is the most common congenital heart disease associated with Ebstein’s anomaly, an isolated ASD typically causes right bundle branch block (RBBB) rather than pre-excitation. * Bicuspid Aortic Valve: This is the most common congenital heart lesion overall and is associated with aortic stenosis, regurgitation, and coarctation of the aorta, but not specifically with pre-excitation. * Patent Ductus Arteriosus (PDA): PDA results in a left-to-right shunt and volume overload of the left heart [1]; it does not involve the conduction system abnormalities seen in pre-excitation. High-Yield Clinical Pearls for NEET-PG: * ECG Findings in Ebstein’s: Look for giant "Himalayan" P-waves (right atrial enlargement), a prolonged PR interval, and RBBB. * Maternal Link: Ebstein’s anomaly is classically associated with maternal Lithium intake during the first trimester. * Auscultation: Characterized by a "split" S1 (loud tricuspid component) and a systolic murmur of tricuspid regurgitation.

Q: Restrictive and constrictive cardiomyopathy occurs together in which of the following conditions?

Amyloidosis. **Explanation:** The correct answer is **Amyloidosis**. **1. Why Amyloidosis is correct:** Amyloidosis is a systemic disease characterized by the extracellular deposition of insoluble amyloid fibrils. In the heart, these deposits infiltrate the myocardium, leading to **Restrictive Cardiomyopathy (RCM)** due to increased ventricular stiffness and impaired diastolic filling. However, amyloid fibrils can also deposit in the **pericardium**, leading to thickening and fibrosis. This dual involvement—myocardial infiltration and pericardial thickening—results in a unique clinical scenario where features of both **restrictive** (myocardial) and **constrictive** (pericardial) physiology coexist. **2. Analysis of Incorrect Options:** * **Radiation Therapy (Option A):** While radiation can cause both restrictive cardiomyopathy (via myocardial fibrosis) and constrictive pericarditis, it is less commonly cited as a "classic" combined entity in standard textbooks compared to the infiltrative nature of amyloidosis. * **Adriamycin (Doxorubicin) Toxicity (Option B):** This typically causes **Dilated Cardiomyopathy (DCM)** due to direct toxic effects on myocytes leading to systolic heart failure, not restrictive or constrictive disease. * **Post-cardiotomy Syndrome (Option C):** This is an inflammatory pericarditis that occurs after cardiac surgery. It primarily leads to **Constrictive Pericarditis** but does not typically involve the myocardium to cause restrictive cardiomyopathy. **3. NEET-PG High-Yield Pearls:** * **Amyloidosis** is the most common cause of Restrictive Cardiomyopathy. * **ECG Finding:** Low voltage complexes in the presence of thickened ventricular walls on Echo (a classic "mismatch"). * **Echo Finding:** "Speckled" or "granular" appearance of the myocardium. * **Gold Standard Diagnosis:** Endomyocardial biopsy showing **Apple-green birefringence** under polarized light with Congo Red stain.

Q: In syndrome X, patients have all of the following features except?

Abnormal coronary arteriogram. **Explanation:** **Cardiac Syndrome X (Microvascular Angina)** is a clinical triad characterized by typical angina-like chest pain, objective evidence of myocardial ischemia on stress testing, but **normal epicardial coronary arteries** on angiography. 1. **Why Option C is the correct answer:** By definition, patients with Syndrome X have **normal coronary arteriograms** (no obstructive lesions in the large epicardial vessels). The underlying pathophysiology is believed to be **coronary microvascular dysfunction** (resistance in vessels <200 μm) or abnormal pain perception, rather than macrovascular atherosclerosis. Therefore, an "abnormal" arteriogram is not a feature of this syndrome. 2. **Analysis of other options:** * **Option A (Angina-like chest pain):** Patients typically present with exertional chest pain that may be indistinguishable from classic angina pectoris. * **Option B (Ischemic ST segment depression):** Despite normal large arteries, these patients demonstrate objective signs of ischemia, such as ST-segment depression during exercise stress testing or perfusion defects on nuclear imaging [1]. * **Option D (Excellent prognosis):** Unlike obstructive coronary artery disease, Syndrome X is associated with a very low risk of myocardial infarction or cardiovascular death, leading to an excellent long-term survival prognosis [2]. **High-Yield Clinical Pearls for NEET-PG:** * **Demographics:** Most commonly seen in **postmenopausal women**. * **Diagnosis of Exclusion:** It is diagnosed only after ruling out coronary spasms (Prinzmetal angina) and obstructive CAD. * **Management:** Treatment includes nitrates, beta-blockers, or calcium channel blockers, though symptoms can sometimes be refractory. * **Metabolic Syndrome X:** Do not confuse *Cardiac Syndrome X* with *Metabolic Syndrome* (Syndrome X/Reaven’s Syndrome), which involves insulin resistance, hypertension, and dyslipidemia.

Q: A 50-year-old man with aortic stenosis stopped exercise after 11 minutes according to the Bruce protocol due to fatigue. He had a peak systolic gradient of 60 mmHg across the aortic valve at rest. What is the best management for this patient?

Aortic valve replacement. **Explanation** The patient has **Severe Aortic Stenosis (AS)**, defined by a peak systolic gradient >64 mmHg or a mean gradient >40 mmHg. In this case, a peak gradient of 60 mmHg at rest, combined with the inability to complete a standard exercise protocol due to fatigue, indicates symptomatic disease. [1] **1. Why Aortic Valve Replacement (AVR) is correct:** The definitive treatment for symptomatic severe AS is surgical or transcatheter AVR. While the patient did not report classic angina or syncope, **exercise intolerance (fatigue)** during a stress test is considered a "symptom equivalent." [2] Once symptoms develop in severe AS, the mortality rate increases drastically (2-year survival is only 50% without intervention). According to AHA/ACC guidelines, AVR is indicated (Class I) for symptomatic patients with severe AS. **2. Why other options are incorrect:** * **Medical management:** There is no effective medical therapy to reverse the mechanical obstruction of AS. It is only used for symptom palliation in non-surgical candidates. * **Aortic valve balloon dilatation (Valvuloplasty):** In adults, this is only a "bridge" to AVR or a palliative measure, as restenosis occurs within 6–12 months. It is not a definitive management. [2] * **Coronary angiography:** While often performed *before* surgery to check for CAD, it is a diagnostic step, not the "management" for the valvular lesion itself. **Clinical Pearls for NEET-PG:** * **Classic Triad of AS:** Dyspnea (Heart Failure), Angina, and Syncope (**SAD**). * **Severe AS Criteria:** Valve area 40 mmHg, or Jet velocity >4.0 m/s. * **Physical Exam:** Pulsus parvus et tardus (slow-rising pulse) and a mid-systolic ejection murmur radiating to the carotids. [1] * **Indication for Surgery in Asymptomatic patients:** LVEF <50% or a positive exercise stress test (development of symptoms or drop in BP). [2]

Q: A 40-year-old male, a chronic smoker, presents with acute epigastric discomfort for the past hour. ECG shows ST segment elevation in the inferior leads. What is the immediate intervention?

Aspirin. **Explanation:** The clinical presentation of acute epigastric discomfort in a middle-aged smoker, combined with ST-elevation in inferior leads (II, III, aVF), is diagnostic of an **Acute Inferior Wall Myocardial Infarction (STEMI)** [1]. In any suspected Acute Coronary Syndrome (ACS), the **immediate first step** in management is the administration of antiplatelet therapy, specifically **Aspirin**. * **Why Aspirin is Correct:** Aspirin (300 mg chewed) is the most critical initial intervention. It inhibits cyclooxygenase-1 (COX-1), preventing the formation of Thromboxane A2, thereby inhibiting further platelet aggregation and thrombus propagation. It has been shown to significantly reduce mortality in the acute phase of MI. **Analysis of Incorrect Options:** * **Thrombolytic therapy (B):** While reperfusion (Primary PCI or Thrombolysis) is the definitive treatment for STEMI, it is initiated *after* the administration of loading doses of antiplatelets (Aspirin + P2Y12 inhibitor). * **IV Pantoprazole (C):** Epigastric pain is a common "anginal equivalent," especially in inferior wall MI due to diaphragmatic irritation [1]. Treating it as a gastric issue (GERD/Gastritis) is a common clinical pitfall that delays life-saving cardiac care. * **Beta blockers (D):** While used in MI, they are not the "immediate" first step. They must be avoided if there is bradycardia or heart block (common in inferior MI) or signs of heart failure [2]. **NEET-PG High-Yield Pearls:** 1. **Inferior MI & Right Ventricle:** Always check V4R (right-sided leads) in inferior MI. If RV infarction is present, **Nitrates are contraindicated** as they cause severe hypotension. 2. **Mnemonic for ACS:** "MONA" (Morphine, Oxygen, Nitrates, Aspirin), but **Aspirin** is the one that consistently reduces mortality. 3. **Door-to-Needle time:** 30 minutes (for thrombolysis); **Door-to-Balloon time:** 90 minutes (for PCI).

Question 1

All of the following are seen in Coarctation of the Aorta, except?

Accepted Answer

Boot shaped heart

Answer

Diminution of femoral pulsations

Answer

High incidence of associated Bicuspid aortic valve

Answer

Left ventricular Hypertrophy

Question 2

Which congenital heart disease is associated with pre-excitation?

Accepted Answer

Ebstein's Anomaly

Answer

Atrial Septal Defect

Answer

Bicuspid Aortic Valve

Answer

Patent Ductus Arteriosus

Question 3

Restrictive and constrictive cardiomyopathy occurs together in which of the following conditions?

Accepted Answer

Amyloidosis

Answer

Radiation therapy

Answer

Adriamycin toxicity

Answer

Post cardiotomy syndrome

Question 4

In syndrome X, patients have all of the following features except?

Accepted Answer

Abnormal coronary arteriogram

Answer

Angina-like chest pain

Answer

Ischemic ST segment depression

Answer

Excellent prognosis

Question 5

A 50-year-old man with aortic stenosis stopped exercise after 11 minutes according to the Bruce protocol due to fatigue. He had a peak systolic gradient of 60 mmHg across the aortic valve at rest. What is the best management for this patient?

Accepted Answer

Aortic valve replacement

Answer

Medical management

Answer

Aortic valve balloon dilatation

Answer

Coronary angiography

Question 6

Which of the following is the preferred marker for detecting acute ST-elevation myocardial infarction (STEMI) in athletes?

Accepted Answer

Troponin T/I

Answer

CK-MB

Answer

C-Reactive Protein

Answer

LDH

Question 7

A 40-year-old male, a chronic smoker, presents with acute epigastric discomfort for the past hour. ECG shows ST segment elevation in the inferior leads. What is the immediate intervention?

Accepted Answer

Aspirin

Answer

Thrombolytic therapy

Answer

IV pantoprazole

Answer

Beta blockers

Question 8

Subaortic stenosis is not associated with which of the following conditions?

Accepted Answer

Aortic regurgitation

Answer

Ventricular septal defect

Answer

Patent ductus arteriosus

Answer

Coarctation of the aorta

Question 9

Which of the following conditions is characterized by a continuous murmur?

Accepted Answer

Patent ductus arteriosus

Answer

Cardiomyopathy

Answer

Mitral stenosis

Answer

Cardiac tamponade

Question 10

Which of the following is NOT a predisposing factor for coronary artery disease?

Accepted Answer

Lipoprotein(a)

Answer

Homocysteinemia

Answer

Fibrinogen

Answer

Plasminogen activator inhibitors 1

Cardiology — MCQs

Cardiology — MCQs

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