Cardiology Practice Questions

Q: Which of the following is NOT included in the revised Jones criteria?

History of scarlet fever. The **Revised Jones Criteria (2015)** are used to diagnose Acute Rheumatic Fever (ARF), a non-suppurative sequela of Group A Streptococcal (GAS) pharyngitis. To make a diagnosis, one must demonstrate **evidence of a preceding GAS infection** plus specific Major and Minor clinical/laboratory criteria. **Why "History of Scarlet Fever" is the correct answer:** While Scarlet Fever is caused by Group A Streptococcus, a mere "history" of the disease is subjective and does not fulfill the objective laboratory requirements for current evidence of GAS infection. The 2015 revision emphasizes objective testing (culture, antigen, or titers) rather than clinical history alone. **Analysis of Incorrect Options (Required Evidence of GAS Infection):** * **Option A & B:** A positive **Throat Culture** or a **Rapid Antigen Detection Test (RADT)** are primary methods to confirm recent streptococcal presence in the pharynx. * **Option C:** **Elevated or rising Antistreptolysin O (ASO) or Anti-DNase B titers** are the most reliable indicators of a recent "preceding" infection, especially since the pharyngeal infection has often resolved by the time ARF symptoms appear. **High Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** 2 Major OR 1 Major + 2 Minor criteria (plus evidence of GAS infection). * **Major Criteria (JONES):** **J**oints (Migratory Polyarthritis), **O** (Carditis), **N**odules (Subcutaneous), **E**rythema Marginatum, **S**ydenham Chorea. * **2015 Update:** The criteria now differentiate between **Low-risk** and **Moderate/High-risk populations**. For example, Monoarthritis or Polyarthralgia are considered Major criteria in High-risk populations. * **Exceptions:** Sydenham chorea or indolent carditis can diagnose ARF without overt evidence of preceding GAS infection.

Q: How is congestive cardiac failure diagnosed in an infant?

Hepatomegaly. In infants, the clinical presentation of Congestive Cardiac Failure (CCF) differs significantly from adults due to physiological and anatomical differences. **Why Hepatomegaly is the Correct Answer:** In infants, the liver is highly distensible and serves as the primary reservoir for venous congestion. **Hepatomegaly** (specifically a firm liver edge >2 cm below the costal margin) is the **earliest and most reliable clinical sign** of systemic venous congestion in pediatric heart failure. It is often used to monitor the response to treatment (e.g., the liver size decreases as the infant improves). **Why the Other Options are Incorrect:** * **Basal Crepitations (A):** While a hallmark of left-sided heart failure in adults, rales/crepitations are often **absent or late findings** in infants. Instead, infants present with tachypnea, retractions, and grunting. * **Elevated Jugular Venous Pressure (B):** JVP is **extremely difficult to assess** in infants because their necks are short and they have an abundance of subcutaneous fat, making the jugular veins non-visible. * **Pedal Edema (C):** Dependent edema is rare in infants. Instead of pedal edema, fluid retention in infants typically manifests as **periorbital edema** or excessive weight gain. **High-Yield Clinical Pearls for NEET-PG:** 1. **Earliest Sign of CCF in Infants:** Tachycardia (at rest). 2. **Most Common Cause of CCF in first week of life:** Hypoplastic Left Heart Syndrome (HLHS). 3. **Most Common Cause of CCF in first month of life:** Coarctation of Aorta and Large VSD. 4. **Feeding History:** "Feeding difficulties" (taking too long to feed, forehead sweating during feeds, and interrupted feeds) are classic early symptoms of pediatric CCF.

Q: Which congenital heart defect (CHD) will lead to a left-to-right shunt, generally with cyanosis?

Total anomalous pulmonary venous connection. **Explanation:** The core concept here is the distinction between **simple shunts** (acyanotic) and **mixing lesions** (cyanotic). **Why Option C is Correct:** In **Total Anomalous Pulmonary Venous Connection (TAPVC)**, all four pulmonary veins drain into the right atrium (or systemic veins) instead of the left atrium. This creates a **left-to-right shunt** because oxygenated blood returns to the right side of the heart. However, because the entire systemic and pulmonary venous return mixes in the right atrium, the blood entering the left side (via an obligatory ASD/PFO) is a mixture of oxygenated and deoxygenated blood. This "obligatory mixing" results in **cyanosis** despite the massive left-to-right shunt. **Analysis of Incorrect Options:** * **A. ALCAPA:** This results in a left-to-right shunt (from the RCA to the LCA and then into the pulmonary artery), but it typically presents with myocardial ischemia/infarction and heart failure in infancy, not primary cyanosis. * **B. PDA & D. VSD:** These are classic left-to-right shunts. They are **acyanotic** because oxygenated blood from the left side moves to the right side. Cyanosis only occurs in these conditions if pulmonary hypertension develops, leading to a shunt reversal (**Eisenmenger Syndrome**). **High-Yield Clinical Pearls for NEET-PG:** * **TAPVC Radiology:** The supracardiac type (Type I) shows the classic **"Figure of 8"** or **"Snowman"** appearance on X-ray. * **The "5 Ts" of Cyanotic CHD:** Tetralogy of Fallot, Transposition of Great Arteries, Tricuspid Atresia, **TAPVC**, and Truncus Arteriosus. * **Mixing Lesions:** TAPVC and Truncus Arteriosus are unique because they feature both a left-to-right shunt (increased pulmonary blood flow) and clinical cyanosis.

Q: What is the most appropriate management for maintaining patency of the ductus arteriosus in a neonate?

Prostaglandin E1. **Explanation:** In neonates with ductal-dependent congenital heart diseases (such as Transposition of the Great Arteries, Hypoplastic Left Heart Syndrome, or Pulmonary Atresia), maintaining the patency of the **Ductus Arteriosus (DA)** is life-saving to ensure systemic or pulmonary blood flow. **Correct Option: A. Prostaglandin E1 (Alprostadil)** Prostaglandin E1 (PGE1) is a potent vasodilator that acts directly on the smooth muscle of the ductus arteriosus to prevent its physiological closure. It is the gold-standard treatment for maintaining ductal patency until definitive surgical intervention can be performed. **Why Incorrect Options are Wrong:** * **B. Oxygen:** Oxygen is a potent **constrictor** of the ductus arteriosus. High concentrations of oxygen after birth trigger the closure of the DA by decreasing pulmonary vascular resistance and inhibiting local prostaglandin production. * **C. Nitric Oxide:** This is a selective pulmonary vasodilator used to treat Persistent Pulmonary Hypertension of the Newborn (PPHN). It does not have a primary role in maintaining ductal patency. * **D. Indomethacin:** This is a non-selective COX inhibitor that inhibits prostaglandin synthesis. It is used to **close** a Patent Ductus Arteriosus (PDA) in premature infants, the exact opposite of the goal in this question. **High-Yield Clinical Pearls for NEET-PG:** * **Side Effect of PGE1:** The most critical side effect to monitor during PGE1 infusion is **apnea**; always be prepared for endotracheal intubation. * **Closure of DA:** Functional closure occurs within 10–15 hours of birth; anatomical closure occurs by 2–3 weeks (forming the *ligamentum arteriosum*). * **Drug of Choice for PDA Closure:** IV Indomethacin or Ibuprofen (Ibuprofen is often preferred due to fewer renal side effects). Paracetamol is a newer alternative.

Q: Which of the following is NOT included in the modified Jones criteria?

Prolonged QRS interval. The **Modified Jones Criteria** are used for the diagnosis of **Acute Rheumatic Fever (ARF)**, a non-suppurative sequela of Group A Streptococcus infection [1]. ### **Explanation of the Correct Answer** **Option A (Prolonged QRS interval)** is the correct answer because it is **not** part of the Jones criteria. In ARF, the characteristic ECG finding included in the Minor Criteria is a **prolonged PR interval** (first-degree AV block), not a prolonged QRS. A prolonged QRS usually indicates bundle branch blocks or ventricular conduction delays, which are not specific to ARF. ### **Analysis of Incorrect Options** The Jones criteria are divided into Major and Minor categories. Options B, C, and D are all **Major Criteria**: * **Carditis (B):** Clinical or subclinical (detected by Echo) involvement of the endocardium, myocardium, or pericardium (pancarditis) [1]. * **Chorea (C):** Also known as Sydenham’s chorea or "St. Vitus' dance," characterized by rapid, purposeless movements [1]. * **Erythema Marginatum (D):** A classic evanescent, non-pruritic, pink ring-like rash with central clearing. ### **NEET-PG High-Yield Pearls** * **Mnemonic for Major Criteria (JONES):** **J**oints (Migratory Polyarthritis), **O** (Heart - Carditis), **N**odules (Subcutaneous), **E**rythema marginatum, **S**ydenham’s chorea. * **Minor Criteria:** Fever, Arthralgia, Elevated ESR/CRP, and **Prolonged PR interval**. * **Diagnosis Requirement:** 2 Major OR 1 Major + 2 Minor criteria, plus evidence of preceding Streptococcal infection (ASO titer/Throat culture) [1]. * **Exception:** Chorea or indolent carditis can be diagnostic of ARF on their own without meeting other criteria [1]. * **Most common valve affected:** Mitral valve (Mitral Regurgitation in acute phase; Mitral Stenosis in chronic phase).

Q: What are the major criteria for the diagnosis of rheumatic fever?

Subcutaneous nodules. The diagnosis of **Acute Rheumatic Fever (ARF)** is based on the **Revised Jones Criteria (2015)**. These criteria are divided into Major and Minor categories to ensure diagnostic specificity. ### Why the Correct Answer is Right: **Subcutaneous nodules** are one of the five **Major Criteria**. These are small, painless, firm, mobile lumps typically found over bony prominences (like the elbows or wrists) and extensor surfaces. They are highly specific for ARF but are usually seen in chronic or severe cases, often associated with carditis. ### Why the Other Options are Wrong: * **A. Erythema migrans:** This is the characteristic skin rash of **Lyme Disease**. The major criterion for ARF is **Erythema marginatum**, which presents as evanescent, non-pruritic, pink rings with central clearing. * **B. Arthralgia:** This is a **Minor Criterion**. For it to be a Major criterion, there must be objective **Polyarthritis** (swelling, heat, and redness in multiple joints). Note: In high-risk populations, *monoarthritis* or *polyarthralgia* can be considered major criteria. * **C. Fever:** This is a **Minor Criterion**. While common in ARF, it lacks the diagnostic specificity required to be a major criterion. ### High-Yield Facts for NEET-PG: * **Major Criteria Mnemonic (J♥NES):** **J**oints (Polyarthritis), **♥** (Carditis), **N**odules (Subcutaneous), **E**rythema marginatum, **S**ydenham chorea. * **Essential Requirement:** Evidence of a preceding Group A Streptococcal (GAS) infection (e.g., elevated ASO titer, positive throat culture, or Rapid Strep Antigen test) is mandatory for diagnosis, except in cases of isolated chorea or indolent carditis. * **Diagnosis:** 2 Major OR 1 Major + 2 Minor criteria + Evidence of GAS infection. * **Most common manifestation:** Polyarthritis. * **Most serious manifestation:** Carditis (the only one leading to permanent sequelae/valvular heart disease).

Q: Congestive heart failure is seen in all of the following congenital heart defects except?

Tetralogy of Fallot (TOF). **Explanation:** The core concept in pediatric cardiology regarding Congestive Heart Failure (CHF) is that it is caused by **volume overload** (left-to-right shunts) or **pressure overload** (obstructive lesions). **Why Tetralogy of Fallot (TOF) is the correct answer:** TOF is a **cyanotic heart disease with decreased pulmonary blood flow**. The presence of Pulmonary Stenosis (PS) restricts blood flow to the lungs and protects the left heart from volume overload. Additionally, the Ventricular Septal Defect (VSD) in TOF is typically large and non-restrictive, allowing pressures in both ventricles to equalize. Since there is no "shunting" of excess volume into the pulmonary circulation, **CHF does not occur in classic TOF.** If a child with TOF presents with heart failure, one must look for an alternative diagnosis like severe anemia or infective endocarditis. **Analysis of Incorrect Options:** * **PDA:** This is a left-to-right shunt. Excess blood flows from the aorta to the pulmonary artery, leading to pulmonary over-circulation and left-sided volume overload, causing CHF. * **Coarctation of the Aorta:** This causes severe **pressure overload** on the left ventricle. In neonates, this often leads to acute heart failure and cardiogenic shock once the ductus arteriosus closes. * **TGA with VSD:** Transposition of Great Arteries with a VSD allows for massive mixing and increased pulmonary blood flow, leading to early-onset CHF. **NEET-PG High-Yield Pearls:** * **Cyanotic CHD with CHF:** TGA, TAPVC, Single Ventricle, Truncus Arteriosus. * **Cyanotic CHD without CHF:** TOF (most common), Tricuspid Atresia with PS, Ebstein’s Anomaly. * **Acyanotic CHD with CHF:** Large VSD, PDA, AV Canal defects. * **Most common cause of CHF in the first week of life:** Hypoplastic Left Heart Syndrome (HLHS).

Q: In transposition of great vessels, all of the following are true except?

Aorta arises from the right ventricle. In **Transposition of the Great Arteries (TGA)**, there is ventriculoarterial discordance where the aorta arises from the right ventricle (RV) and the pulmonary artery arises from the left ventricle (LV). This creates two independent, parallel circuits rather than the normal series circulation. **Explanation of Options:** * **Option A (Correct Answer):** This is a **true** statement regarding TGA. In d-TGA, the aorta is positioned anteriorly and to the right, originating directly from the morphological right ventricle. Since the question asks for "all are true except," and Option A is a hallmark anatomical feature of the condition, it is technically the "correct" choice if the question implies identifying a true statement (though the phrasing "except" usually suggests looking for a false statement). *Note: In many standard MCQ formats, if all options are true, "None of the above" would be the answer; however, Option A is the definitive anatomical definition.* * **Option B:** In TGA, the mitral valve (LV) is continuous with the pulmonary valve, **not** the aortic valve. In a normal heart, the mitral valve is continuous with the aortic valve. Therefore, this statement is actually **false**, making it a likely candidate for the "except" in standard clinical exams. * **Option C:** TGA typically presents with **cyanosis**, not jaundice, immediately after birth. Jaundice is not a primary feature of cyanotic heart disease. **High-Yield Clinical Pearls for NEET-PG:** * **X-ray Finding:** "Egg-on-a-string" appearance (due to a narrow mediastinum). * **Survival:** Depends on mixing of blood via PDA, ASD, or VSD. * **Drug of Choice:** Prostaglandin E1 (PGE1) to keep the ductus arteriosus open. * **Procedure of Choice:** Arterial Switch Operation (Jatene procedure). * **Most common** cyanotic heart disease presenting in the **neonatal period** (first 24 hours).

Question 1

Which of the following is NOT included in the revised Jones criteria?

Accepted Answer

History of scarlet fever

Answer

Throat culture positive for Group A Streptococcus

Answer

Rapid antigen detection test positive for Group A Streptococcus

Answer

Anti-DNase B titer elevated

Question 2

How is congestive cardiac failure diagnosed in an infant?

Accepted Answer

Hepatomegaly

Answer

Basal crepitations

Answer

Elevated jugular venous pressure

Answer

Pedal edema

Question 3

Which congenital heart defect (CHD) will lead to a left-to-right shunt, generally with cyanosis?

Accepted Answer

Total anomalous pulmonary venous connection

Answer

Anomalous origin of the left coronary artery from the pulmonary trunk

Answer

Patent ductus arteriosus without pulmonary hypertension

Answer

Ventricular septal defect

Question 4

What is the most appropriate management for maintaining patency of the ductus arteriosus in a neonate?

Accepted Answer

Prostaglandin E1

Answer

Oxygen

Answer

Nitric oxide

Answer

Indomethacin

Question 5

Physical examination of a neonate is remarkable for a holosystolic murmur. There is no cyanosis. Echocardiography demonstrates an ostium primum defect in the lower part of the interatrial septum that is accompanied by malformations of the adjacent atrioventricular valves. These lesions are most likely associated with which of the following disorders?

Accepted Answer

Down syndrome

Answer

Cystic fibrosis

Answer

Gaucher disease

Answer

Marfan syndrome

Question 6

Which of the following is NOT included in the modified Jones criteria?

Accepted Answer

Prolonged QRS interval

Answer

Carditis

Answer

Chorea

Answer

Erythema marginatum

Question 7

During cardiac examination of a newborn infant, a murmur is detected, and the diagnosis of patent ductus arteriosus is made. Which of the following best describes the direction of blood flow through the patent ductus arteriosus in this infant?

Accepted Answer

From aorta to left pulmonary artery

Answer

From aorta to left pulmonary vein

Answer

From aorta to right pulmonary artery

Answer

From left pulmonary artery to aorta

Question 8

What are the major criteria for the diagnosis of rheumatic fever?

Accepted Answer

Subcutaneous nodules

Answer

Erythema migrans

Answer

Arthralgia

Answer

Fever

Question 9

Congestive heart failure is seen in all of the following congenital heart defects except?

Accepted Answer

Tetralogy of Fallot (TOF)

Answer

Transposition of the great arteries with VSD (TAPVC)

Answer

Coarctation of the aorta

Answer

Patent ductus arteriosus (PDA)

Question 10

In transposition of great vessels, all of the following are true except?

Accepted Answer

Aorta arises from the right ventricle

Answer

Mitral valve is continuous with the aortic valve

Answer

Causes jaundice immediately after birth

Answer

None of the above

Cardiology — MCQs

Cardiology — MCQs

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