Cardiology Practice Questions

Q: A 9-month-old child born to a diabetic mother presents with tachypnea and hepatomegaly. Echocardiography showed normal cardiac morphology with asymmetric septal hypertrophy. What is the recommended treatment for this child?

Propranolol. ### Explanation The clinical presentation describes **Infant of Diabetic Mother (IDM)** with **Hypertrophic Cardiomyopathy (HCM)**, specifically presenting as **Asymmetric Septal Hypertrophy (ASH)**. In IDM, hyperinsulinemia in utero acts as an anabolic hormone, causing increased deposition of glycogen and fat in the myocardial septum. This leads to left ventricular outflow tract (LVOT) obstruction. **Why Propranolol is the Correct Answer:** * **Mechanism:** Beta-blockers like Propranolol are the drugs of choice. They decrease the heart rate (increasing diastolic filling time) and reduce myocardial contractility (negative inotropy). * **Effect:** By reducing the force of contraction, Propranolol decreases the dynamic pressure gradient across the LVOT, thereby improving cardiac output and relieving symptoms of heart failure in these specific cases. **Why Other Options are Incorrect:** * **Digoxin (Option A):** Strictly contraindicated. As a positive inotrope, it increases the force of contraction, which worsens the septal obstruction and narrows the LVOT further. * **Furosemide (Option B):** Diuretics reduce preload. In obstructive HCM, decreasing the ventricular volume makes the obstruction more severe (the walls "slap" together sooner), worsening the clinical state. * **Verapamil (Option D):** While a calcium channel blocker, it is generally avoided in infants due to the risk of profound hypotension and cardiovascular collapse. **NEET-PG High-Yield Pearls:** 1. **Prognosis:** Unlike genetic HCM, HCM in IDM is **transient**. It typically resolves spontaneously within 6–12 months as insulin levels normalize post-delivery. 2. **Management:** Most cases are asymptomatic and require only observation. Treatment (Propranolol) is reserved for symptomatic infants (tachypnea, heart failure). 3. **Avoid "ABCD":** Avoid **A**mines (Inotropes), **B**-agonists, **C**alcium channel blockers (in infants), and **D**iuretics/Digoxin.

Q: Which of the following is NOT typically seen in William syndrome?

Subvalvular aortic stenosis. **Explanation:** The correct answer is **B (Subvalvular aortic stenosis)** because Williams Syndrome is classically associated with **Supravalvular Aortic Stenosis (SVAS)**, not subvalvular. This distinction is a high-yield point for NEET-PG. **1. Why Subvalvular Aortic Stenosis is incorrect:** In Williams Syndrome, there is a deletion of the elastin gene (*ELN*) on chromosome 7q11.23. This leads to an obstructive arteriopathy, most commonly manifesting as **Supravalvular Aortic Stenosis** (an hourglass narrowing of the ascending aorta above the sinuses of Valsalva) and peripheral pulmonary artery stenosis. Subvalvular stenosis is more typically associated with conditions like HOCM or discrete subaortic membranes. **2. Analysis of other options:** * **A. Elfin facies:** This is a hallmark clinical feature, characterized by a broad forehead, periorbital puffiness, stellate iris pattern, low-set ears, and a long philtrum. * **C. Hypercalcemia:** Idiopathic infantile hypercalcemia is a classic metabolic association. While often transient, it can lead to irritability and nephrocalcinosis. * **D. Hypertension:** This is common in Williams Syndrome due to renal artery stenosis or generalized arterial stiffness/narrowing caused by elastin deficiency. **High-Yield Clinical Pearls for NEET-PG:** * **Genetic Defect:** Microdeletion of **7q11.23** (Elastin gene). * **Personality:** "Cocktail party personality" (extremely friendly, loquacious, and empathetic). * **Cardiac:** Supravalvular Aortic Stenosis is the most common lesion; Pulmonary artery stenosis is also frequent. * **Diagnosis:** Confirmed via **FISH** (Fluorescence In Situ Hybridization) or CMA.

Q: All the following are indicated in the long-term therapy of children with coronary abnormalities in Kawasaki disease EXCEPT?

Intravenous immunoglobulins. **Explanation:** The management of Kawasaki Disease (KD) is divided into two phases: **Acute Phase** (to reduce systemic inflammation and prevent coronary artery aneurysms) and **Long-term Phase** (to prevent thrombosis in damaged coronary arteries). **Why Intravenous Immunoglobulins (IVIG) is the correct answer:** IVIG is the cornerstone of **acute management**. It is administered as a single high dose (2 g/kg) within the first 10 days of illness to reduce the incidence of coronary artery abnormalities from 25% to <5%. However, IVIG has a short half-life and no role in the **long-term therapy** of established coronary abnormalities, which focuses on anti-thrombotic prophylaxis. **Analysis of Incorrect Options (Long-term therapies):** * **B. Aspirin:** Used in low doses (3–5 mg/kg/day) for its anti-platelet effect in all children with KD until coronary arteries are normal on echocardiography (usually 6–8 weeks) or indefinitely if abnormalities persist. * **C. Clopidogrel:** Added as dual anti-platelet therapy (DAPT) in children at high risk for thrombosis (e.g., rapidly expanding or large aneurysms). * **D. Warfarin:** Indicated for systemic anticoagulation in patients with **Giant Aneurysms** (internal diameter >8 mm or Z-score ≥10) to prevent myocardial infarction. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** KD is a clinical diagnosis (Fever ≥5 days + 4/5 clinical criteria: Conjunctivitis, Rash, Edema/Erythema of hands/feet, Mucosal changes, Cervical lymphadenopathy). * **Echo Timing:** Perform at diagnosis, 2 weeks, and 6–8 weeks. * **Vaccination:** Live vaccines (MMR, Varicella) should be delayed for **11 months** after high-dose IVIG administration. * **Reye Syndrome:** Avoid Ibuprofen if the child is on Aspirin; switch to Clopidogrel if the child develops Influenza or Varicella.

Q: A 4-month-old infant is brought to the physician for a routine examination. Physical examination shows epicanthic folds and a palmar simian crease. Cytogenetic testing shows an autosomal trisomy. Which of the following cardiac anomalies is most commonly associated with this condition?

Complete Atrioventricular septal defect. ### Explanation **Diagnosis and Association** The clinical presentation of **epicanthic folds**, a **palmar simian crease**, and **autosomal trisomy** confirms a diagnosis of **Down Syndrome (Trisomy 21)**. Down syndrome is the most common chromosomal disorder associated with congenital heart disease (CHD), occurring in approximately 40–50% of affected infants. **Why Option B is Correct** The most common cardiac anomaly in Down syndrome is an **Atrioventricular Septal Defect (AVSD)**, specifically the **complete** form (also known as an Endocardial Cushion Defect). This defect involves a large hole in the center of the heart affecting both the atrial and ventricular septa, along with a common AV valve. It accounts for nearly 40% of all CHD cases in these patients. **Why Other Options are Incorrect** * **A. Atrial Septal Defect (ASD):** While Secundum ASDs are common in the general population and can occur in Down syndrome, they are less frequent than AVSDs in this specific population. (Note: Primum ASD is a component of partial AVSD). * **C. Mitral Stenosis:** This is not a classic association with Trisomy 21. Mitral valve abnormalities in Down syndrome are usually part of the complex AVSD morphology (e.g., a cleft mitral valve). * **D. Patent Ductus Arteriosus (PDA):** PDA is most strongly associated with **Congenital Rubella Syndrome** or prematurity, rather than Trisomy 21. **NEET-PG High-Yield Pearls** * **Most common CHD in Down Syndrome:** AVSD (Endocardial Cushion Defect). * **Second most common CHD in Down Syndrome:** Ventricular Septal Defect (VSD). * **ECG Finding in AVSD:** "Superior" or **Left Axis Deviation** with a "Goose-neck deformity" on angiography. * **Screening:** All infants with Down syndrome must receive an echocardiogram, regardless of whether a murmur is present, due to the high risk of asymptomatic CHD.

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).

Question 1

A 9-month-old child born to a diabetic mother presents with tachypnea and hepatomegaly. Echocardiography showed normal cardiac morphology with asymmetric septal hypertrophy. What is the recommended treatment for this child?

Accepted Answer

Propranolol

Answer

Digoxin

Answer

Furosemide

Answer

Verapamil

Question 2

Which of the following is NOT typically seen in William syndrome?

Accepted Answer

Subvalvular aortic stenosis

Answer

Elfin facies

Answer

Hypercalcemia

Answer

Hypertension

Question 3

All the following are indicated in the long-term therapy of children with coronary abnormalities in Kawasaki disease EXCEPT?

Accepted Answer

Intravenous immunoglobulins

Answer

Aspirin

Answer

Clopidogrel

Answer

Warfarin

Question 4

A 4-month-old infant is brought to the physician for a routine examination. Physical examination shows epicanthic folds and a palmar simian crease. Cytogenetic testing shows an autosomal trisomy. Which of the following cardiac anomalies is most commonly associated with this condition?

Accepted Answer

Complete Atrioventricular septal defect

Answer

Atrial septal defect

Answer

Mitral stenosis

Answer

Patent ductus arteriosus

Question 5

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 6

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

Accepted Answer

Small

Answer

Normal

Answer

Enlarged

Answer

Aneurysmal

Question 7

Ductus-dependent congenital heart lesions are a type of:

Accepted Answer

Obstructive shock

Answer

Distributive shock

Answer

Hypovolemic shock

Answer

Cardiogenic shock

Question 8

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 9

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 10

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

Cardiology — MCQs

Cardiology — MCQs

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