Cardiology Practice Questions

Q: In which of the following conditions is left atrial enlargement least prominent?

Atrial septal defect. ***Atrial septal defect*** - In an **atrial septal defect (ASD)**, blood shunts from the left atrium (LA) to the right atrium (RA). [1] This flow **reduces the volume load on the LA**, meaning the left atrium does not directly experience a significant increase in pressure or volume. - While increased flow goes to the **right ventricle and pulmonary arteries**, the left atrium itself is spared from the overload that typically causes enlargement. [1] *Ventricular septal defect* - A **ventricular septal defect (VSD)** causes a left-to-right shunt at the ventricular level, increasing blood flow to the **pulmonary circulation** and subsequently back to the left atrium. - This **volume overload returning to the left atrium** leads to prominent left atrial enlargement. *Aortopulmonary window* - An **aortopulmonary window (APW)** results in a large left-to-right shunt from the aorta to the pulmonary artery, significantly increasing **pulmonary blood flow**. - This increased pulmonary flow returns to the left atrium, causing substantial **volume overload and prominent left atrial enlargement**. *Patent ductus arteriosus* - A **patent ductus arteriosus (PDA)** allows blood to shunt from the aorta to the pulmonary artery, leading to increased **pulmonary blood flow**. - This increased flow returns to the left atrium, leading to significant **volume overload and prominent left atrial enlargement**.

Q: Eisenmenger syndrome is characterized by all except:

Return of left ventricle & right ventricle to normal size. Return of left ventricle & right ventricle to normal size - In Eisenmenger syndrome, the structural heart changes are generally irreversible; the left and right ventricles do not return to normal size due to persistent pulmonary hypertension and shunting [1]. - The syndrome represents an advanced stage of congenital heart disease where the shunt reverses from left-to-right to right-to-left, causing progressive ventricular remodeling. *Pulmonary veins not distended* - This is a characteristic feature of Eisenmenger syndrome. The pulmonary veins are not distended because the reduced pulmonary blood flow, caused by increased pulmonary vascular resistance, leads to decreased venous return to the left atrium. - The altered hemodynamics, specifically the right-to-left shunt, bypasses significant portions of the pulmonary circulation, thus preventing engorgement of the pulmonary veins. *Pruning of peripheral pulmonary arteries* - This is a hallmark of pulmonary hypertension and Eisenmenger syndrome, representing the obliteration and narrowing of smaller pulmonary arterial branches [1]. - The progressive loss of these vessels contributes to the elevated pulmonary vascular resistance and contributes to the irreversible nature of the condition. *Dilatation of central pulmonary arteries* - This is typically seen in Eisenmenger syndrome due to the high pressure and flow through the main pulmonary artery and its larger branches. - While peripheral vessels constrict and "prune," the central arteries often undergo compensatory dilatation in response to the chronic high pressure [2].

Q: A wide and notched P wave is typically seen in:

Mitral stenosis. ***Mitral stenosis*** - A **wide and notched P wave**, often referred to as **P mitrale**, is characteristic of left atrial enlargement, which is a common sequela of mitral stenosis [1]. - The delayed depolarization of the enlarged left atrium causes the P wave to become prolonged and often develops a bifid or notched appearance. *Cor pulmonale* - Cor pulmonale typically leads to **right atrial enlargement**, which can manifest as a **tall, peaked P wave** (P pulmonale), not a wide and notched one. - This condition is caused by chronic lung disease leading to pulmonary hypertension [2]. *COPD* - While **COPD** can lead to **cor pulmonale** and subsequent right atrial enlargement, the characteristic P wave change is **P pulmonale** (tall, peaked P wave), not a wide and notched P wave. - COPD primarily affects the lungs, leading to increased pulmonary vascular resistance over time. *Pulmonary embolism* - An acute **pulmonary embolism** can cause **acute right heart strain**, which might lead to right atrial enlargement or other changes like **S1Q3T3 pattern** on ECG. - However, it does not typically cause a **wide and notched P wave**; the P wave changes associated with right atrial strain are usually tall and peaked.

Q: In the context of jugular venous pressure (JVP), a giant 'a' wave is typically observed in which of the following conditions?

Tricuspid stenosis. ***Tricuspid stenosis*** - A **giant 'a' wave** in JVP is caused by increased resistance to right atrial emptying during **atrial systole**, leading to elevated pressure in the right atrium and superior vena cava. - **Tricuspid stenosis** is the most direct cause of this increased resistance, as the narrowed tricuspid valve obstructs blood flow from the right atrium to the right ventricle [1]. *Junctional rhythm* - This rhythm can lead to **cannon 'a' waves**, which are intermittent and result from simultaneous atrial and ventricular contraction against a closed tricuspid valve, not a persistent giant 'a' wave. - The 'a' wave in junctional rhythm is not consistently giant because the atria and ventricles do not always contract simultaneously. *Tricuspid regurgitation* - **Tricuspid regurgitation** is characterized by a prominent **'v' wave** or **CV fusion wave** due to blood flowing back into the right atrium during ventricular systole. - It does not typically cause a giant 'a' wave, as there is no increased resistance to right atrial emptying. *Complete heart block* - In **complete heart block**, there is AV dissociation, leading to random, intermittent **cannon 'a' waves** when the atria contract against a closed tricuspid valve. - This is distinct from a consistently giant 'a' wave seen with conditions like tricuspid stenosis, which reflects a fixed obstruction.

Q: Which of the following is NOT a cause of restrictive cardiomyopathy (RCM)?

Fatty infiltration of myocardium. ***Fatty infiltration of myocardium*** - While fatty infiltration can occur in the heart, it is typically associated with **arrhythmogenic right ventricular cardiomyopathy (ARVC)**, a dilated cardiomyopathy [1], rather than restrictive cardiomyopathy. - **Restrictive cardiomyopathy** is characterized by stiff, non-compliant ventricular walls that impair diastolic filling, which is not the primary mechanism of fatty infiltration. *Amyloidosis* - **Amyloidosis** is a common cause of restrictive cardiomyopathy due to the deposition of **insoluble amyloid fibrils** in the myocardial interstitium [2]. - This deposition leads to **increased myocardial stiffness** and impaired diastolic function. *Sarcoidosis* - **Cardiac sarcoidosis** can cause restrictive cardiomyopathy by the infiltration of **non-caseating granulomas** into the myocardium [2]. - These granulomas lead to **fibrosis and thickening** of the ventricular walls, restricting ventricular filling. *Carcinoid syndrome* - **Carcinoid heart disease**, occurring in patients with carcinoid syndrome, can manifest as restrictive cardiomyopathy due to the deposition of **fibrous plaques** on the endocardium, particularly on the right side of the heart. - This fibrosis primarily affects the **valves and endocardial surface**, hindering ventricular filling and function.

Q: What is the recommended management approach for uncomplicated essential hypertension?

Lifestyle changes with medication as needed. Lifestyle changes with medication as needed - For uncomplicated essential hypertension, initial management often involves lifestyle modification [1], [3], with the addition of pharmacotherapy if blood pressure targets are not met [1]. - This approach balances the benefits of self-management with the efficacy of medication in preventing cardiovascular complications [1], [2]. Lifestyle changes alone are sufficient - While lifestyle changes are crucial, they are usually not sufficient for many patients to achieve and maintain target blood pressure levels, especially as hypertension progresses. - Relying solely on lifestyle changes might lead to uncontrolled hypertension, increasing the risk of organ damage and cardiovascular events [2]. Combination of lifestyle changes and medication - This approach is typically recommended for patients with higher blood pressure readings or those with additional cardiovascular risk factors [2], where immediate and more aggressive blood pressure control is needed. - For uncomplicated hypertension, starting with medication immediately might be considered too aggressive for all patients, as some can achieve control with lifestyle changes first. Medication alone - Managing hypertension with medication alone overlooks the significant benefits of lifestyle modifications such as diet, exercise, and stress reduction [3]. - This approach may require higher doses or multiple medications, potentially increasing side effects and reducing patient adherence without addressing underlying lifestyle contributors.

Q: Which of the following is not a symptom of carotid atherosclerosis?

Contralateral retinal infarction. ***Contralateral retinal infarction*** - Retinal infarction, or **ocular stroke**, specifically affects the **ipsilateral eye** (the eye on the same side as the affected carotid artery), as the ophthalmic artery branches off the internal carotid artery. - A contralateral retinal infarction would imply the blockage is in the opposite carotid artery or a different circulatory issue. *Ipsilateral retinal infarction* - This is a direct consequence of **carotid stenosis**, as emboli from the carotid artery can travel up the **ophthalmic artery** to cause infarction in the retina of the same-sided eye. - Presents as sudden, painless **loss of vision** in one eye, often in a specific field. *Contralateral body TIA* - **Transient ischemic attacks (TIAs)** resulting from carotid atherosclerosis typically cause neurological deficits on the **contralateral side of the body** due to the decussation of motor and sensory pathways in the brain. - Symptoms like temporary weakness, numbness, or speech difficulties on the opposite side of the body are characteristic. *Ipsilateral amaurosis fugax* - **Amaurosis fugax** is a classic symptom of carotid atherosclerosis, characterized by a **transient monocular vision loss** (often described as a curtain coming down) in the eye on the *same side* as the affected carotid artery. - This occurs due to **retinal emboli** originating from the carotid plaque.

Q: Orthostatic hypotension is said to be present if the systolic blood pressure falls by how much while assuming a standing posture from a sitting posture.

>20 mm Hg. ***>20 mm Hg*** - Orthostatic hypotension is clinically defined as a drop of **at least 20 mmHg** in **systolic blood pressure**, or at least 10 mmHg in diastolic blood pressure, within three minutes of standing [1]. - This drop signifies a failure of the **baroreflex mechanism** to adequately compensate for the gravitational pooling of blood. *>10 mm Hg* - A systolic blood pressure drop of **10 mmHg or less** when standing is typically considered within normal physiological response limits. - A 10 mmHg drop in systolic pressure, while notable, is more specifically the threshold for **diastolic blood pressure** when diagnosing orthostatic hypotension [1]. *>30 mm Hg* - While a drop of **30 mmHg or more** in systolic blood pressure would certainly indicate orthostatic hypotension, it is beyond the established minimum diagnostic criteria. - Such a significant drop often points to more severe cardiovascular dysregulation or autonomic dysfunction. *>40 mm Hg* - A drop of **40 mmHg or more** in systolic blood pressure is an extreme manifestation of orthostatic hypotension and would usually be associated with profound symptoms. - This degree of blood pressure change is well past the diagnostic threshold and indicative of severe compromise in **orthostatic regulation**.

Q: A systolic thrill in the left 2nd or 3rd intercostal space is heard in which of the following conditions?

Pulmonary stenosis. ***Pulmonary stenosis*** - A **systolic thrill** in the **left 2nd or 3rd intercostal space** is characteristic of significant **pulmonary stenosis**, where turbulent blood flow occurs across the narrowed pulmonary valve [1]. - The thrill is palpable over the **pulmonic area**, indicating high-velocity flow and pressure gradients [2]. *Tetralogy of Fallot (TOF)* - While TOF includes **pulmonary stenosis**, the primary thrill felt is typically due to the **right ventricular outflow tract obstruction** and is often accompanied by other findings like cyanosis [3]. - The thrill in TOF can be in the pulmonic area but is part of a more complex clinical picture, including a **ventricular septal defect** [3]. *Ebstein's anomaly (EA)* - **Ebstein's anomaly** involves the **tricuspid valve**, leading to tricuspid regurgitation and right atrial enlargement. - A thrill is not a typical finding; instead, auscultation might reveal a **holosystolic murmur of tricuspid regurgitation** at the lower left sternal border. *Subpulmonic ventricular septal defect (VSD)* - A **subpulmonic VSD** typically produces a **holosystolic murmur** best heard at the left sternal border, often accompanied by a thrill directly over the VSD [4]. - The thrill location for a VSD is generally more medial and lower than the pulmonic area [4].

Question 1

In which of the following conditions is left atrial enlargement least prominent?

Accepted Answer

Atrial septal defect

Answer

Ventricular septal defect

Answer

Patent ductus arteriosus

Answer

Aortopulmonary window

Question 2

Eisenmenger syndrome is characterized by all except:

Accepted Answer

Return of left ventricle & right ventricle to normal size

Answer

Pulmonary veins not distended

Answer

Pruning of peripheral pulmonary arteries

Answer

Dilatation of central pulmonary arteries

Question 3

A wide and notched P wave is typically seen in:

Accepted Answer

Mitral stenosis

Answer

COPD

Answer

Cor pulmonale

Answer

Pulmonary embolism

Question 4

In the context of jugular venous pressure (JVP), a giant 'a' wave is typically observed in which of the following conditions?

Accepted Answer

Tricuspid stenosis

Answer

Junctional rhythm

Answer

Tricuspid regurgitation

Answer

Complete heart block

Question 5

Which of the following is NOT a cause of restrictive cardiomyopathy (RCM)?

Accepted Answer

Fatty infiltration of myocardium

Answer

Carcinoid syndrome

Answer

Sarcoidosis

Answer

Amyloidosis

Question 6

What is the recommended management approach for uncomplicated essential hypertension?

Accepted Answer

Lifestyle changes with medication as needed

Answer

Lifestyle changes alone are sufficient

Answer

Medication alone

Answer

Combination of lifestyle changes and medication

Question 7

Which of the following is not a symptom of carotid atherosclerosis?

Accepted Answer

Contralateral retinal infarction

Answer

Contralateral body TIA

Answer

Ipsilateral retinal infarction

Answer

Ipsilateral amaurosis fugax

Question 8

Which of the following statements about physiological murmurs is false?

Accepted Answer

Physiological murmurs are always audible without a stethoscope.

Answer

Midsystolic murmurs are common in children.

Answer

Physiological murmurs can be present in children with anemia.

Answer

Only diastolic murmurs are present in adults with heart disease.

Question 9

Orthostatic hypotension is said to be present if the systolic blood pressure falls by how much while assuming a standing posture from a sitting posture.

Accepted Answer

>20 mm Hg

Answer

>10 mm Hg

Answer

>30 mm Hg

Answer

>40 mm Hg

Question 10

A systolic thrill in the left 2nd or 3rd intercostal space is heard in which of the following conditions?

Accepted Answer

Pulmonary stenosis

Answer

Tetralogy of Fallot (TOF)

Answer

Ebstein's anomaly (EA)

Answer

Subpulmonic ventricular septal defect (VSD)

Cardiology — MCQs

Cardiology — MCQs

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