Cardiology Practice Questions

Q: Which of the following produces a continuous murmur except?

Mitral valve prolapse. A **continuous murmur** is defined as a murmur that begins in systole and continues through the second heart sound (S2) into all or part of diastole. This occurs when there is a persistent pressure gradient between two chambers or vessels throughout the entire cardiac cycle [1]. **Why Mitral Valve Prolapse (MVP) is the correct answer:** MVP typically produces a **mid-systolic click** [1] followed by a **late systolic murmur**. It is not a continuous murmur because the regurgitation occurs only when the ventricular pressure rises enough to prolapse the leaflets into the left atrium during systole. Once the aortic valve closes (S2) and diastole begins, the pressure gradient shifts, and the murmur ceases. **Analysis of Incorrect Options (Causes of Continuous Murmurs):** * **Patent Ductus Arteriosus (PDA):** The classic "Gibson’s murmur." Since aortic pressure is higher than pulmonary artery pressure in both systole and diastole, flow is continuous. * **Ruptured Sinus of Valsalva (RSOV):** Usually ruptures into the right ventricle or right atrium. Because aortic diastolic pressure remains higher than right-sided pressures, a continuous murmur is produced. * **Arteriovenous (AV) Malformations:** These create a direct communication between a high-pressure artery and a low-pressure vein, maintaining a gradient throughout the cycle. **Clinical Pearls for NEET-PG:** * **Most common cause of continuous murmur:** PDA. * **Venous Hum:** A benign continuous murmur heard in the neck (disappears with jugular vein compression or turning the head). * **Cruveilhier-Baumgarten Murmur:** A continuous murmur heard over the epigastrium due to collateral circulation in portal hypertension. * **Blalock-Taussig (BT) Shunt:** A surgical cause of a continuous murmur.

Q: Pulsus paradoxus is seen in all of the following EXCEPT:

Mitral regurgitation. Explanation: **Pulsus paradoxus** is defined as an exaggerated decrease in systolic blood pressure (>10 mmHg) during inspiration. Under normal physiological conditions, inspiration increases venous return to the right heart, causing the interventricular septum to bulge slightly into the left ventricle (LV), minimally reducing LV stroke volume. **Why Mitral Regurgitation (MR) is the correct answer:** In MR, the left ventricle is "overfilled" due to the constant volume overload from the left atrium [1]. This increased preload and the presence of a "safety valve" (the regurgitant flow back into the atrium) prevent the inspiratory shift of the septum from significantly compromising LV output. Therefore, pulsus paradoxus is **not** a feature of MR. In fact, MR is often associated with a *normal* or even *diminished* respiratory variation in blood pressure. **Why the other options are incorrect:** * **Acute Asthma & Cor Pulmonale:** These involve severe respiratory distress. Large negative intrathoracic pressures during inspiration increase systemic venous return while simultaneously increasing the pooling of blood in the expanded pulmonary vasculature. This significantly reduces LV filling, leading to pulsus paradoxus. * **SVC Obstruction:** While less common than in tamponade, severe SVC obstruction can cause pulsus paradoxus due to the marked changes in intrathoracic pressure dynamics and altered venous return patterns. **NEET-PG High-Yield Pearls:** * **Most Common Cause:** Cardiac Tamponade (Classic triad: Hypotension, JVP distension, muffled heart sounds) [2]. * **Kussmaul’s Sign vs. Pulsus Paradoxus:** Pulsus paradoxus is seen in Tamponade; Kussmaul’s sign (inspiratory rise in JVP) is typically seen in **Constrictive Pericarditis** (though CP can occasionally show both). * **Reverse Pulsus Paradoxus:** Seen in Hypertrophic Obstructive Cardiomyopathy (HOCM) and during positive pressure ventilation.

Q: A 55-year-old woman presents with complaints of chest pain. She states that the chest pain predictably occurs when she climbs four flights of stairs to reach her apartment or when she has been jogging for more than 10 minutes. She is particularly concerned because her mother died of a myocardial infarction at 50 years of age. Which of the following best describes this patient's state?

Stable angina pectoris. The patient’s presentation is classic for **Stable Angina Pectoris**. The hallmark of this condition is chest pain that is **predictable, reproducible, and occurs during physical exertion** (climbing stairs, jogging) or emotional stress [1]. It is caused by a fixed coronary artery stenosis (usually >70%) that creates a "demand-supply mismatch"—the blood flow is sufficient at rest but inadequate when myocardial oxygen demand increases [2]. The pain typically resolves with rest or sublingual nitroglycerin. **2. Why the Other Options are Incorrect:** * **Arrhythmia:** While arrhythmias can cause chest discomfort or palpitations, they do not typically present with this specific, predictable relationship to physical exertion. * **Myocardial Infarction (MI):** MI involves complete coronary occlusion leading to myocardial necrosis [4]. The pain is usually more severe, lasts >20 minutes, occurs at rest, and is not relieved by rest or nitrates. [4] * **Prinzmetal Angina:** Also known as variant angina, this is caused by coronary artery vasospasm. Unlike stable angina, it characteristically occurs **at rest**, often in the early morning hours, and is not triggered by exertion. **3. NEET-PG High-Yield Pearls:** * **Gold Standard Investigation:** Coronary Angiography (to visualize stenosis). * **Initial Investigation of Choice:** Exercise Stress Test (Treadmill Test/TMT) [3]. * **Pathophysiology:** Fixed atherosclerotic plaque (Stable Angina) vs. Plaque rupture/thrombosis (Acute Coronary Syndrome) [1]. * **Management:** Lifestyle modification, Beta-blockers (first-line for symptom control), Aspirin, and Statins. * **Clinical Definition:** Stable angina is defined by the "3 Ps": **P**redictable, **P**recipitated by exertion, and **P**romptly relieved by rest. [1]

Q: What is the most likely cardiac lesion in a young adult who complains of headache, dizziness, and intermittent claudication with exercise?

Coarctation of the aorta. **Explanation:** The clinical presentation of **headache, dizziness, and intermittent claudication** in a young adult is a classic triad for **Coarctation of the Aorta (CoA)**. **1. Why Coarctation of the Aorta is correct:** CoA is a localized narrowing of the aorta, typically distal to the origin of the left subclavian artery (juxtaductal). This creates a pressure gradient: * **Proximal to the obstruction:** Hypertension occurs in the upper body, leading to **headaches, dizziness, and epistaxis**. * **Distal to the obstruction:** Hypotension and reduced blood flow occur in the lower body, causing **intermittent claudication** (leg pain during exercise) and cold extremities. * **Physical Exam:** The hallmark is **radio-femoral delay** and a significant blood pressure difference between the upper and lower limbs. **2. Why the other options are incorrect:** * **Tetralogy of Fallot (TOF):** A cyanotic heart disease characterized by "Tet spells" and squatting. It does not typically cause upper body hypertension or claudication. * **Atrial Septal Defect (ASD):** Usually asymptomatic in childhood; presents in adulthood with dyspnea, palpitations, or paradoxical embolism. It features a **fixed split S2**. * **Patent Ductus Arteriosus (PDA):** Characterized by a **continuous machinery murmur** and bounding pulses. It does not cause a pressure differential between the arms and legs. **High-Yield Clinical Pearls for NEET-PG:** * **Chest X-ray:** Look for the **"3" sign** (indentation of the aorta) and **rib notching** (due to collateral flow through intercostal arteries). * **Association:** Strongly associated with **Turner Syndrome** (bicuspid aortic valve is the most common associated cardiac anomaly). * **Diagnosis:** Echocardiography is initial; CT Angiography is the gold standard for anatomy.

Q: A 65-year-old man with a history of syncopal attacks on exertion and angina is undergoing heart valve surgery. Which kind of pulse is expected to be present before surgery?

Anacrotic pulse. ### Explanation The clinical triad of **exertional syncope, angina, and dyspnea** in an elderly patient is the classic presentation of **Aortic Stenosis (AS)**. **1. Why Anacrotic Pulse is Correct:** In severe Aortic Stenosis, the narrowed valve orifice obstructs left ventricular outflow. This results in a pulse that is slow to rise and low in amplitude, known as **Pulsus Parvus et Tardus** [1]. When a palpable notch is felt on the ascending limb of the pulse wave, it is specifically termed an **Anacrotic pulse**. This occurs because the high pressure required to force blood through the stenotic valve creates a "hesitation" or notch during the initial upstroke. **2. Analysis of Incorrect Options:** * **Dicrotic Pulse:** Characterized by two peaks, one in systole and one in diastole (after the second heart sound). It is typically seen in states of very low cardiac output and high systemic vascular resistance, such as severe **Dilated Cardiomyopathy**. * **Pulsus Bigeminus:** A rhythm disorder where a normal beat is followed by a premature ventricular contraction (PVC). It is most commonly associated with **Digoxin toxicity**. * **Pulsus Bisferiens:** Features two systolic peaks. It is characteristic of **Aortic Regurgitation (AR)** or combined AS/AR, and **Hypertrophic Obstructive Cardiomyopathy (HOCM)**. **3. NEET-PG High-Yield Pearls:** * **Aortic Stenosis:** Look for a "Harsh Crescendo-Decrescendo" systolic murmur radiating to the carotids [1]. * **Pulsus Alternans:** Alternating strong and weak beats; a hallmark of **Left Ventricular Failure**. * **Water-hammer Pulse (Corrigan’s):** Large volume, collapsing pulse seen in **Aortic Regurgitation**. * **Pulsus Paradoxus:** An exaggerated drop in systolic BP (>10 mmHg) during inspiration; classic for **Cardiac Tamponade**.

Q: Which of the following is NOT included in the differential diagnosis of this ECG finding?

Hypercalcemia. ***Hypercalcemia*** - Hypercalcemia causes **shortened QT interval** on ECG, not deep T-wave inversions. - The classic finding is **QT shortening** due to accelerated ventricular repolarization, making it an incorrect differential for deep symmetric T-wave inversions. *Intracranial Hemorrhage (ICH)* - Can cause **deep symmetric T-wave inversions** in precordial leads, particularly in subarachnoid hemorrhage. - Associated with **QT prolongation** and other repolarization abnormalities due to autonomic dysfunction. *Apical Hypertrophy of the heart* - Classic finding includes **giant T-wave inversions** in precordial leads, particularly V4-V6. - Often seen in **hypertrophic cardiomyopathy** with apical variant, creating deep symmetric T-wave changes. *Wellens' Syndrome* - Characterized by **deep symmetric T-wave inversions** in anterior precordial leads (V2-V4). - Indicates **critical LAD stenosis** and high risk for anterior wall myocardial infarction.

Q: In which condition is the intensity of a systolic murmur increased?

Severe aortic stenosis. **Explanation:** The intensity of a systolic murmur is primarily determined by the volume and velocity of blood flow across a valve or orifice. In **Severe Aortic Stenosis (AS)**, the murmur is a harsh, crescendo-decrescendo midsystolic murmur [2]. As the stenosis progresses from mild to severe, the pressure gradient across the calcified aortic valve increases significantly. This high-pressure gradient forces blood through a narrowed opening at a higher velocity, thereby increasing the turbulence and the resulting intensity of the murmur [2]. **Analysis of Options:** * **Hypertrophic Cardiomyopathy (HOCM):** While HOCM presents with a systolic murmur, its intensity typically *decreases* with increased preload (e.g., squatting) and *increases* with decreased preload (e.g., Valsalva) [1]. It does not inherently increase in intensity simply by the progression of the disease state in the same hemodynamic manner as fixed AS. * **Mitral Stenosis (MS):** This condition produces a **diastolic** murmur (mid-diastolic rumble with an opening snap), not a systolic one [3]. * **Aortic Regurgitation (AR):** This condition produces a high-pitched, blowing **early diastolic** murmur [3]. While a flow systolic murmur may coexist due to increased stroke volume, the primary pathology is diastolic. **High-Yield Clinical Pearls for NEET-PG:** * **AS Murmur Character:** The peak of the murmur occurs later in systole as the stenosis becomes more severe ("Late-peaking" murmur) [2]. * **Pulsus Parvus et Tardus:** A small, slow-rising carotid pulse is a classic sign of severe AS [2]. * **Gallavardin Phenomenon:** In elderly patients, the high-frequency components of the AS murmur may be heard best at the apex, mimicking mitral regurgitation [2]. * **Reverse Splitting of S2:** Often seen in severe AS due to delayed closure of the aortic valve.

Q: A 35-year-old athlete has height 184 cm, arm span 194 cm, pulse rate 64/min, and BP 148/64 mm Hg. Chest auscultation reveals a long diastolic murmur over the right second intercostal space on routine examination. What is the probable diagnosis?

Aortic regurgitation. ### Explanation The clinical presentation points toward **Marfan Syndrome** complicated by **Aortic Regurgitation (AR)**. **1. Why Aortic Regurgitation is correct:** * **Marfanoid Habitus:** The patient’s arm span (194 cm) exceeds his height (184 cm), a classic sign of Marfan syndrome (Arm span to height ratio >1.05). * **Hemodynamics:** A BP of 148/64 mm Hg shows a **wide pulse pressure** (84 mm Hg), characteristic of AR due to a large stroke volume and rapid diastolic runoff [1]. * **Auscultation:** A **long diastolic murmur** at the right second intercostal space (the aortic area) is the hallmark of AR, often resulting from aortic root dilation in Marfan patients [2]. **2. Why the other options are incorrect:** * **Atrial Septal Defect (ASD):** Typically presents with a fixed splitting of the second heart sound (S2) and a systolic ejection murmur over the pulmonary area, not a diastolic murmur. * **Ebstein Anomaly:** Characterized by tricuspid regurgitation (holosystolic murmur) and right-sided heart failure; it is not associated with Marfanoid habitus or wide pulse pressure. * **Coarctation of Aorta:** Presents with upper limb hypertension and radio-femoral delay. The murmur is usually systolic and heard best over the back (infrascapular region). **3. High-Yield Clinical Pearls for NEET-PG:** * **Marfan Syndrome:** An autosomal dominant defect in the **FBN1 gene** (Fibrillin-1) on Chromosome 15. * **Aortic Root Dilation:** The most common cardiovascular complication in Marfan syndrome, leading to AR or Aortic Dissection [2]. * **Peripheral Signs of AR:** Look for Quincke’s pulse (capillary pulsations), Corrigan’s pulse (water-hammer), and de Musset’s sign (head nodding). * **Murmur Localization:** While AR is usually heard at the left sternal border (Erb’s point), AR due to **aortic root pathology** (like Marfan’s) is often loudest at the **right sternal border**.

Q: Which of the following is the most common identifiable cause for restrictive cardiomyopathy?

Amyloidosis. Explanation: **Amyloidosis** is the most common identifiable cause of restrictive cardiomyopathy (RCM). The underlying pathophysiology involves the extracellular deposition of insoluble amyloid fibrils (misfolded proteins) within the myocardial interstitium. This leads to increased ventricular wall thickness and stiffness, resulting in impaired diastolic filling (diastolic dysfunction) while systolic function is often preserved until late stages. On echocardiography, this classically presents as a "speckled" or "granular" myocardial appearance. **Analysis of Incorrect Options:** * **Alcohol (A):** This is a common cause of **Dilated Cardiomyopathy (DCM)**, not restrictive [1]. It leads to toxic injury of myocytes and ventricular enlargement [1]. * **Hemochromatosis (B):** While iron overload can cause RCM, it more frequently presents as **Dilated Cardiomyopathy**. It is a less common cause of RCM compared to amyloidosis. * **Sarcoidosis (D):** This is an infiltrative disease that can cause RCM due to non-caseating granulomas; however, it is statistically less common than amyloidosis and often presents with conduction blocks or arrhythmias. **High-Yield Clinical Pearls for NEET-PG:** * **Kussmaul’s Sign:** A paradoxical rise in JVP during inspiration, frequently seen in RCM. * **ECG Paradox:** Amyloidosis often shows **low voltage complexes** on ECG despite the appearance of "thickened" ventricular walls on Echo (which is actually protein infiltration, not true hypertrophy). * **Endomyocardial Biopsy:** The gold standard for diagnosis; amyloid shows **Congo Red staining** with **apple-green birefringence** under polarized light. * **Differentiating RCM from Constrictive Pericarditis:** RCM typically has a higher BNP level and lacks the respiratory variation in mitral inflow velocities seen in pericarditis.

Question 1

Which of the following produces a continuous murmur except?

Accepted Answer

Mitral valve prolapse

Answer

Arteriovenous malformations

Answer

Ruptured sinus of Valsalva

Answer

Patent ductus arteriosus

Question 2

Pulsus paradoxus is seen in all of the following EXCEPT:

Accepted Answer

Mitral regurgitation

Answer

Corpulmonale

Answer

Acute asthma

Answer

SVC obstruction

Question 3

A 55-year-old woman presents with complaints of chest pain. She states that the chest pain predictably occurs when she climbs four flights of stairs to reach her apartment or when she has been jogging for more than 10 minutes. She is particularly concerned because her mother died of a myocardial infarction at 50 years of age. Which of the following best describes this patient's state?

Accepted Answer

Stable angina pectoris

Answer

Arrhythmia

Answer

Myocardial infarction

Answer

Prinzmetal angina

Question 4

What is the most likely cardiac lesion in a young adult who complains of headache, dizziness, and intermittent claudication with exercise?

Accepted Answer

Coarctation of the aorta

Answer

Tetralogy of Fallot (TOF)

Answer

Atrial Septal Defect (ASD)

Answer

Patent Ductus Arteriosus (PDA)

Question 5

A 65-year-old man with a history of syncopal attacks on exertion and angina is undergoing heart valve surgery. Which kind of pulse is expected to be present before surgery?

Accepted Answer

Anacrotic pulse

Answer

Dicrotic pulse

Answer

Pulsus bigeminus

Answer

Pulsus bisferiens

Question 6

A 63-year-old woman develops exertional angina and has had two episodes of syncope. Examination shows a systolic ejection murmur with radiation to the carotids and a soft S2. Which of the following is the most likely diagnosis?

Accepted Answer

aortic stenosis

Answer

mitral stenosis

Answer

mitral insufficiency

Answer

aortic insufficiency

Question 7

Which of the following is NOT included in the differential diagnosis of this ECG finding?

Accepted Answer

Hypercalcemia

Answer

Intracranial Hemorrhage (ICH)

Answer

Apical Hypertrophy of the heart

Answer

Wellens' Syndrome

Question 8

In which condition is the intensity of a systolic murmur increased?

Accepted Answer

Severe aortic stenosis

Answer

Hypertrophic cardiomyopathy

Answer

Mitral stenosis

Answer

Aortic regurgitation

Question 9

A 35-year-old athlete has height 184 cm, arm span 194 cm, pulse rate 64/min, and BP 148/64 mm Hg. Chest auscultation reveals a long diastolic murmur over the right second intercostal space on routine examination. What is the probable diagnosis?

Accepted Answer

Aortic regurgitation

Answer

Atrial septal defect

Answer

Ebstein anomaly

Answer

Coarctation of aorta

Question 10

Which of the following is the most common identifiable cause for restrictive cardiomyopathy?

Accepted Answer

Amyloidosis

Answer

Alcohol

Answer

Hemochromatosis

Answer

Sarcoidosis

Cardiology — MCQs

Cardiology — MCQs

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