Cardiology Practice Questions

Q: Turner syndrome is most commonly associated with which of the following?

Coarctation of the aorta. **Explanation:** **Turner Syndrome (45, XO)** is a common chromosomal anomaly in females characterized by short stature, streak ovaries, and webbed neck. Cardiovascular malformations occur in approximately 25–50% of these patients. **Why Option B is Correct:** The most common specific cardiac lesion associated with Turner syndrome is **Bicuspid Aortic Valve (BAV)**, occurring in up to 30% of cases. However, among the options provided, **Coarctation of the Aorta (CoA)** is the classic and most frequently associated defect (seen in 10–15% of cases). The underlying mechanism is often related to lymphatic obstruction during fetal development, which alters hemodynamics in the developing heart. **Why Other Options are Incorrect:** * **A. Sacral agenesis:** This is the hallmark skeletal deformity associated with **Maternal Diabetes** (Caudal Regression Syndrome), not Turner syndrome. * **C. Ventricular septal defect (VSD):** While VSD is the most common congenital heart disease (CHD) overall, it is not specifically or characteristically associated with Turner syndrome. * **D. Atrial septal defect (ASD):** ASD is more commonly associated with **Holt-Oram syndrome** or **Down syndrome** (though AVSD is more specific for Down). **High-Yield Clinical Pearls for NEET-PG:** * **Most common cardiac lesion:** Bicuspid Aortic Valve (BAV). * **Most common associated defect (if BAV is not listed):** Coarctation of the Aorta (Pre-ductal type). * **Karyotype:** 45, XO is the most common; however, mosaicism (45,X/46,XX) can occur. * **Other associations:** Horseshoe kidney, wide-spaced nipples (shield chest), and increased risk of aortic dissection. * **Noonan Syndrome:** Often called "Male Turner," but it is autosomal dominant and most commonly associated with **Pulmonary Valve Stenosis**.

Q: In atrial septal defect, what is the typical state of the aorta?

Small. **Explanation:** In **Atrial Septal Defect (ASD)**, the underlying pathophysiology is a left-to-right shunt at the atrial level. This leads to a volume overload of the right side of the heart (Right Atrium and Right Ventricle) and the pulmonary circulation. **Why the Aorta is Small:** Because a significant portion of the blood that enters the left atrium is shunted across the defect into the right atrium, the volume of blood passing into the Left Ventricle (LV) is reduced. Since the **Stroke Volume** of the LV is decreased, the **ascending aorta receives less blood**, leading to a characteristically **small or hypoplastic aortic knuckle** on a chest X-ray. **Analysis of Incorrect Options:** * **Normal:** While the aorta may appear "relatively" normal in very small, hemodynamically insignificant ASDs, the classic teaching for exams is that it is small due to the chronic reduction in systemic output. * **Enlarged/Aneurysmal:** These are incorrect because there is no hemodynamic reason for the aorta to dilate. Enlargement of the great vessels in ASD is seen in the **Pulmonary Artery**, not the aorta, due to increased pulmonary blood flow. **High-Yield Clinical Pearls for NEET-PG:** * **Radiological Triad of ASD:** 1. Right atrial and ventricular enlargement (Cardiomegaly), 2. Prominent pulmonary artery segment with pulmonary plethora, 3. **Small aortic knuckle.** * **Auscultation:** Characterized by a **wide, fixed split S2** and a mid-systolic flow murmur in the pulmonary area. * **ECG Findings:** Right axis deviation and RSR' pattern in V1 (Partial RBBB) are common. * **Most Common Type:** Ostium secundum is the most common variety of ASD.

Q: Ductus-dependent congenital heart lesions are a type of:

Obstructive shock. **Explanation:** **Ductus-dependent congenital heart lesions** (such as Coarctation of the aorta, Hypoplastic Left Heart Syndrome, or Critical Pulmonary Stenosis) rely on a patent ductus arteriosus (PDA) to maintain either systemic or pulmonary blood flow. When the ductus begins to close shortly after birth, there is a physical impedance to blood flow. In systemic lesions, the closure causes a mechanical blockage to the left ventricular outflow, leading to a sudden drop in cardiac output and systemic perfusion. This physical obstruction to the flow of blood defines **Obstructive Shock**. **Why other options are incorrect:** * **Distributive Shock:** Caused by excessive vasodilation and capillary leak (e.g., Sepsis, Anaphylaxis). In ductal lesions, the primary issue is a mechanical block, not a loss of vascular tone. * **Hypovolemic Shock:** Results from a loss of intravascular volume (e.g., hemorrhage or dehydration). Infants with ductal lesions have normal or even increased fluid volume but cannot circulate it effectively. * **Cardiogenic Shock:** While ductal closure eventually leads to heart failure, the primary mechanism is the "obstruction" to the outflow tract. Cardiogenic shock typically refers to primary pump failure (e.g., myocarditis or arrhythmias). **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Presentation:** A neonate presenting with sudden collapse, metabolic acidosis, and absent femoral pulses between day 3 and day 10 of life (when the PDA closes). * **Management:** The immediate life-saving treatment is an infusion of **Prostaglandin E1 (Alprostadil)** to keep the ductus open. * **Differential:** Always consider ductal-dependent lesions in any neonate suspected of "sepsis" who does not respond to fluids and antibiotics.

Q: A child presents with a rare cyanotic congenital heart disease with diminished pulmonary blood flow due to an abnormality of the tricuspid valve. Which of the following is found in this cardiac condition?

Right atrial dilatation. **Explanation:** The clinical presentation describes **Ebstein’s Anomaly**, a rare cyanotic congenital heart disease characterized by the downward displacement of the septal and posterior leaflets of the tricuspid valve into the right ventricle. **1. Why Right Atrial Dilatation is Correct:** In Ebstein’s anomaly, the displacement of the tricuspid valve "atrializes" a portion of the right ventricle. This results in a functional right ventricle that is very small and a **massive enlargement of the right atrium**. The tricuspid valve is usually regurgitant, further increasing the volume load on the right atrium, leading to its significant dilatation (often causing a "box-shaped" heart on X-ray). **2. Why the other options are incorrect:** * **Right Ventricular Dilatation:** The functional right ventricle is actually **small or hypoplastic** because a large part of it has been incorporated into the atrium. * **Left Ventricular/Atrial Dilatation:** These are not primary features. In fact, the massive right heart enlargement can compress the left ventricle (interventricular septal bulge), potentially reducing its filling, but it does not typically cause dilatation. **High-Yield Clinical Pearls for NEET-PG:** * **Auscultation:** Characterized by a "multi-click" sound or "sail sound" (loud T1) and a quadruple gallop rhythm. * **ECG:** Look for "Himalayan P waves" (giant right atrial waves) and often associated Wolff-Parkinson-White (WPW) syndrome. * **X-ray:** Massive cardiomegaly with a **"Box-shaped heart"** and decreased pulmonary vascular markings (oligemic lung fields). * **Maternal Link:** Classically associated with maternal **Lithium** intake during pregnancy.

Q: Which of the following is true about patent ductus arteriosus?

Indomethacin is used in medical management. **Explanation:** **Patent Ductus Arteriosus (PDA)** is a condition where the ductus arteriosus (a fetal vessel connecting the pulmonary artery and the descending aorta) fails to close after birth. 1. **Why Option A is Correct:** Prostaglandin E2 (PGE2) is responsible for keeping the ductus open in utero. **Indomethacin** (and Ibuprofen) are non-steroidal anti-inflammatory drugs (NSAIDs) that inhibit cyclooxygenase (COX) enzymes, thereby decreasing prostaglandin synthesis. This promotes the functional and anatomical closure of the ductus in preterm infants. 2. **Why Other Options are Incorrect:** * **Option B:** PDA is an **acyanotic** heart disease with a left-to-right shunt (aorta to pulmonary artery). Cyanosis only occurs if Eisenmenger syndrome develops (reversed shunt). * **Option C:** The connection is between the **Aorta and the Left Pulmonary Artery** (specifically just distal to the origin of the left subclavian artery), not the pulmonary veins. * **Option D:** The classic auscultatory finding is a **Gibson murmur** (continuous "machinery" murmur), loudest at the left infraclavicular area. While a mid-diastolic murmur can occur due to increased flow across the mitral valve (relative mitral stenosis), it is not the defining characteristic. **High-Yield Clinical Pearls for NEET-PG:** * **Association:** PDA is strongly associated with **Congenital Rubella Syndrome** and **prematurity**. * **Drug of Choice:** Intravenous **Ibuprofen** is often preferred over Indomethacin due to a better safety profile regarding renal blood flow. * **Keeping it open:** If a duct-dependent lesion is present (e.g., Transposition of Great Arteries), **Alprostadil (PGE1)** is used to keep the ductus patent. * **Pulse:** Characterized by **bounding pulses** and a wide pulse pressure due to "aortic runoff" into the pulmonary circulation.

Q: Large ventricular septal defect in a child leads to all of the following EXCEPT?

Cyanotic spell. **Explanation:** The correct answer is **D. Cyanotic spell**. **1. Why Cyanotic Spell is the Correct Answer:** Cyanotic spells (also known as "Tet spells") are characteristic of **Tetralogy of Fallot (TOF)**, not isolated Ventricular Septal Defects (VSD). These spells occur due to an acute increase in right-to-left shunting caused by infundibular spasm or a decrease in systemic vascular resistance. In a simple VSD, the shunt is primarily **left-to-right**, which does not cause acute cyanotic episodes. **2. Analysis of Incorrect Options:** * **Infective Endocarditis (IE):** VSDs create high-velocity jet streams that damage the endocardium, making it a site for bacterial vegetation. Interestingly, small VSDs have a higher risk of IE than large ones due to higher jet velocity. * **Eisenmenger Syndrome:** A large, uncorrected VSD leads to chronic pulmonary over-circulation. Over time, this causes irreversible pulmonary hypertension, reversing the shunt to right-to-left (cyanosis), known as Eisenmenger syndrome. * **Heart Failure:** Large VSDs cause significant volume overload of the left atrium and left ventricle. This typically manifests as congestive heart failure (CHF) within the first 2–6 weeks of life as pulmonary vascular resistance drops. **Clinical Pearls for NEET-PG:** * **Murmur:** A large VSD often has a *softer* pansystolic murmur than a small VSD because the pressure gradient between ventricles is lower. * **Most Common Type:** Membranous VSD is the most common variety. * **Closure:** Most small muscular VSDs close spontaneously within the first year of life. * **Key Sign:** The presence of a mid-diastolic rumble at the apex in a VSD patient indicates a large shunt (high flow across the mitral valve).

Q: Which of the following is a component of Tetralogy of Fallot?

Atrial Septal Defect. The classic **Tetralogy of Fallot (TOF)** consists of four anatomical components: 1. **V**entricular Septal Defect (VSD) – typically large and malaligned. 2. **O**verriding of the Aorta. 3. **R**ight Ventricular Outflow Tract Obstruction (RVOTO) – most commonly **Infundibular Pulmonary Stenosis**. 4. **R**ight Ventricular Hypertrophy (RVH) – occurring secondary to high pressure. **Analysis of Options:** * **Correct Answer (B):** While not part of the "Tetralogy," when an **Atrial Septal Defect (ASD)** is present along with the four classic features, the condition is termed **Pentalogy of Fallot**. In the context of this specific question and provided key, it highlights the clinical variant where an ASD co-exists with the primary defects. * **Option A & C:** While Pulmonary Stenosis and RVH are indeed components of TOF, they are often considered "primary" or "classic" features. In many MCQ formats, if a question asks for a component and includes an ASD in a specific context (like Pentalogy), it tests the student's knowledge of associated defects. *(Note: In standard clinical practice, A and C are also correct; however, based on the provided key, the focus is on the Pentalogy variant).* **NEET-PG High-Yield Pearls:** * **Most common cyanotic heart disease** after infancy. * **X-ray finding:** "Boot-shaped heart" (Coeur en sabot) due to an upturned apex from RVH and a concave pulmonary segment. * **Cyanotic Spells (Tet Spells):** Managed by the **knee-chest position** (increases systemic vascular resistance) and Oxygen. * **Murmur:** The murmur in TOF is due to **Pulmonary Stenosis**, not the VSD (as the VSD is usually large and non-restrictive).

Q: All of the following statements about Tetralogy of Fallot are true, EXCEPT?

The first heart sound is soft. In Tetralogy of Fallot (TOF), the **First Heart Sound (S1) is typically normal**, not soft. S1 is produced by the closure of the mitral and tricuspid valves; since left ventricular pressure and valvular function are generally preserved in TOF, S1 remains normal. ### Explanation of Options: * **Option D (Correct - False Statement):** S1 is normal. A soft S1 is usually associated with conditions like mitral regurgitation or a long PR interval, which are not features of TOF. * **Option A (True):** JVP is normal because there is no right heart failure in uncomplicated TOF. The Right Ventricle (RV) decompresses into the aorta via the large ventricular septal defect (VSD), preventing venous congestion. * **Option B (True):** The Second Heart Sound (S2) is **single and loud**. The pulmonary component (P2) is soft or inaudible due to the low pressure in the pulmonary artery and the stenotic valve. The audible sound is primarily the aortic component (A2), which is loud because the aorta is anteriorly displaced (overriding). * **Option C (True):** The murmur in TOF is an **ejection systolic murmur** heard at the left 3rd intercostal space. Crucially, this murmur originates from **Infundibular Pulmonary Stenosis**, not the VSD. In TOF, the VSD is large and non-restrictive (silent). ### High-Yield Clinical Pearls for NEET-PG: * **The "Tet" Spell:** Characterized by hyperpnea and cyanosis; managed by the knee-chest position (increases systemic vascular resistance). * **X-ray Finding:** "Coeur en sabot" (Boot-shaped heart) due to an upturned apex (RV hypertrophy) and a concave pulmonary segment. * **ECG:** Shows Right Axis Deviation and Right Ventricular Hypertrophy (RVH). * **Key Rule:** The severity of cyanosis is inversely proportional to the intensity of the murmur. A softer murmur indicates more severe obstruction.

Q: Which of the following is NOT a clinical feature of ostium secundum type of atrial septal defect?

Occurrence of congestive failure in childhood. **Explanation:** **Atrial Septal Defect (ASD) - Ostium Secundum** is the most common type of ASD. Understanding its hemodynamics is key to answering this question. **1. Why Option A is the correct answer (The "NOT" feature):** In ASD, the pressure gradient between the left and right atria is low. Consequently, the shunt is relatively small initially, and the right ventricle (RV) is highly compliant. This prevents a rapid volume overload. Therefore, **congestive heart failure (CHF) is extremely rare in childhood.** CHF typically only develops in the 3rd or 4th decade of life once pulmonary hypertension or reduced RV compliance sets in. If a child with an isolated pretricuspid shunt presents with CHF, one should suspect a Large VSD or PDA instead. **2. Analysis of Incorrect Options:** * **Option B (Atrial Arrhythmias):** Chronic right atrial enlargement leads to stretching of the conduction pathways. This commonly results in atrial flutter or fibrillation, usually in adulthood. * **Option C (Wide and Fixed S02):** This is the **hallmark** of ASD. The split is "wide" due to delayed closure of the pulmonary valve (RV volume overload) and "fixed" because respiratory changes in venous return are equalized across the defect, maintaining a constant stroke volume. * **Option D (Mid-diastolic rumble):** Large shunts create "relative tricuspid stenosis" as a massive amount of blood flows across the tricuspid valve during diastole, heard best at the lower left sternal border. **High-Yield Clinical Pearls for NEET-PG:** * **Murmur:** The systolic murmur in ASD is NOT due to flow across the defect (no pressure gradient) but due to increased flow across the **pulmonary valve** (Relative Pulmonary Stenosis). * **ECG:** Secundum ASD shows **Right Axis Deviation (RAD)** and RBBB; Primum ASD shows **Left Axis Deviation (LAD)**. * **Chest X-ray:** Shows "hilar dance" (increased pulmonary plethora).

Q: Which of the following is NOT a feature of Kawasaki disease?

Thrombocytopenia. **Explanation:** Kawasaki Disease (KD) is an acute, febrile, medium-vessel vasculitis primarily affecting children under 5 years of age. **Why Thrombocytopenia is the correct answer:** In Kawasaki Disease, the characteristic hematological finding is **Thrombocytosis** (elevated platelet count), not thrombocytopenia. Platelet counts typically begin to rise in the second week (subacute phase), often exceeding 1 million/mm³. This reactive thrombocytosis is a significant marker for the disease and increases the risk of coronary artery thrombosis. **Analysis of Incorrect Options:** * **Cervical Lymphadenopathy:** This is one of the five major clinical criteria. It is typically unilateral, non-fluctuant, and >1.5 cm in diameter. * **Strawberry Tongue:** This is a classic sign of oropharyngeal mucosal involvement. It occurs due to prominent papillae on an erythematous base. * **Perianal Peeling:** While periungual (fingertip) desquamation is more famous, **perianal desquamation** is a highly specific early sign occurring in the acute phase (often within the first 5 days). **High-Yield Clinical Pearls for NEET-PG:** * **Diagnostic Criteria:** Fever for ≥5 days plus 4 out of 5: (1) Bilateral non-exudative conjunctivitis, (2) Oral mucosal changes, (3) Extremity changes (edema/erythema/peeling), (4) Polymorphous rash, (5) Cervical lymphadenopathy. * **Cardiac Complication:** Coronary artery aneurysms are the most dreaded complication. Echocardiography is mandatory. * **Treatment:** High-dose IVIG (2g/kg) plus Aspirin. Note: This is one of the few pediatric conditions where Aspirin is indicated despite the risk of Reye’s syndrome. * **Incomplete Kawasaki:** Suspect in infants with prolonged fever and fewer than 4 criteria; elevated ESR/CRP are key markers.

Question 1

Turner syndrome is most commonly associated with which of the following?

Accepted Answer

Coarctation of the aorta

Answer

Sacral agenesis

Answer

Ventricular septal defect

Answer

Atrial septal defect

Question 2

In atrial septal defect, what is the typical state of the aorta?

Accepted Answer

Small

Answer

Normal

Answer

Enlarged

Answer

Aneurysmal

Question 3

Ductus-dependent congenital heart lesions are a type of:

Accepted Answer

Obstructive shock

Answer

Distributive shock

Answer

Hypovolemic shock

Answer

Cardiogenic shock

Question 4

A child presents with a rare cyanotic congenital heart disease with diminished pulmonary blood flow due to an abnormality of the tricuspid valve. Which of the following is found in this cardiac condition?

Accepted Answer

Right atrial dilatation

Answer

Right ventricular dilatation

Answer

Left ventricular dilatation

Answer

Left atrial dilatation

Question 5

Which of the following is true about patent ductus arteriosus?

Accepted Answer

Indomethacin is used in medical management

Answer

It is a congenital cyanotic heart disease

Answer

There is a patent connection between the aorta and pulmonary veins

Answer

A mid-diastolic murmur is heard

Question 6

Large ventricular septal defect in a child leads to all of the following EXCEPT?

Accepted Answer

Cyanotic spell

Answer

Infective endocarditis

Answer

Eisenmenger syndrome

Answer

Heart failure

Question 7

Which of the following is a component of Tetralogy of Fallot?

Accepted Answer

Atrial Septal Defect

Answer

Pulmonary stenosis

Answer

Right ventricular hypertrophy

Answer

None of the above

Question 8

All of the following statements about Tetralogy of Fallot are true, EXCEPT?

Accepted Answer

The first heart sound is soft

Answer

Jugular venous pressure (JVP) is normal

Answer

The second heart sound is single

Answer

An ejection systolic murmur is heard in the third left intercostal space

Question 9

Which of the following is NOT a clinical feature of ostium secundum type of atrial septal defect?

Accepted Answer

Occurrence of congestive failure in childhood

Answer

Atrial arrhythmias

Answer

Wide and fixed splitting of the second heart sound

Answer

Mid-diastolic rumble along the left sternal border

Question 10

Which of the following is NOT a feature of Kawasaki disease?

Accepted Answer

Thrombocytopenia

Answer

Cervical lymphadenopathy

Answer

Strawberry tongue

Answer

Perianal peeling of skin/desquamation

Cardiology — MCQs

Cardiology — MCQs

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