Cardiology Practice Questions

Q: Treatment of asymptomatic bradycardia is

No treatment is required. **No treatment is required** - **Asymptomatic bradycardia** generally indicates that the heart rate, though slow, is sufficient to meet the body's metabolic demands. - Intervening in the absence of symptoms could be unnecessary and potentially introduce risks without clear benefit [2]. *Give atropine* - **Atropine** is typically used for **symptomatic bradycardia** (e.g., hypotension, altered mental status, chest pain) to increase heart rate by blocking parasympathetic action. - In an asymptomatic patient, its use is not indicated and could lead to side effects like tachycardia or urinary retention. *Isoprenaline* - **Isoprenaline** is a non-selective beta-agonist used to increase heart rate and contractility, often in severe bradycardia or heart block. - Like atropine, its use is reserved for **symptomatic bradycardia** or specific emergency situations, not for asymptomatic conditions. *Cardiac pacing* - **Cardiac pacing** (either temporary or permanent) is indicated for **symptomatic bradycardia** that is refractory to pharmacological treatment or for certain types of heart block [1]. - It is an invasive procedure and is not appropriate for a patient who is asymptomatic.

Q: The normal range for Ankle Brachial Pressure Index (ABI) is:

1.0-1.3 (Normal). **1.0-1.3 (Normal)** - An **ABI** value between 1.0 and 1.3 is considered the normal range, indicating adequate blood flow to the lower extremities. - This range signifies that the **blood pressure** in the ankles is similar to or slightly higher than the blood pressure in the arms, as expected in healthy individuals [1]. * >1.3 (Calcified arteries)* - An **ABI** value greater than 1.3 usually suggests **calcification** and hardening of the arteries, making them incompressible. - This high reading often occurs in patients with **diabetes** or **chronic kidney disease** and can falsely elevate the ABI, potentially masking underlying peripheral artery disease. *0.8-0.9 (Mild PAD)* - An **ABI** in this range indicates **mild peripheral artery disease (PAD)**, where there is some reduction in blood flow, but symptoms might be subtle or only present with exertion. - Patients may experience claudication, but it's typically less severe and could improve with conservative management [1]. *0.5-0.8 (Moderate PAD)* - This range suggests **moderate peripheral artery disease (PAD)**, indicating a more significant blockage or narrowing of the arteries. - Patients often experience **intermittent claudication** and may have discomfort with less strenuous activity [1].

Q: LBBB is seen with all except

Hypokalemia (low potassium levels). ***Hypokalemia (low potassium levels)*** - **Hypokalemia** does not typically cause LBBB. Instead, it can lead to **QT prolongation**, **U waves**, and flattened T waves, and may predispose to arrhythmias like **torsades de pointes** [3]. - While electrolyte imbalances can affect cardiac conduction, LBBB is primarily associated with structural heart disease or conditions that directly impact the left bundle branch [1]. *Acute Myocardial Infarction (MI)* - **Acute MI**, particularly anterior or septal MIs, can damage the **left bundle branch**, leading to new-onset LBBB [2]. - New LBBB in the setting of acute MI often indicates a **large infarction** and is associated with a worse prognosis [2]. *Hyperkalemia (high potassium levels)* - **Severe hyperkalemia** can cause a variety of ECG changes, including **widening of the QRS complex**, which can mimic LBBB or lead to other intraventricular conduction delays. - As potassium levels rise, the ECG can progress from tall peaked T waves to a wide QRS, flattened P waves, and ultimately a **sine wave pattern** and asystole. *Ashman phenomenon (aberrant conduction in atrial fibrillation)* - The **Ashman phenomenon** is a form of aberrant ventricular conduction, typically seen during **atrial fibrillation**. It refers to a wide QRS complex that occurs after a short R-R interval preceded by a long R-R interval. - This phenomenon often exhibits a morphology consistent with **right bundle branch block (RBBB)**, but can occasionally present with a LBBB-like morphology due to differences in refractory periods of the bundle branches.

Q: A patient in regular rhythm presents with absent P waves on ECG. Which of the following is the most likely diagnosis based on the ECG findings?

Atrial Flutter with Fixed Block. ***Atrial Flutter with Fixed Block*** - The ECG shows a **sawtooth pattern** of atrial activity, characteristic of atrial flutter, with **regular R-R intervals** indicating a fixed AV block. - While **P waves are absent**, the discrete, regular flutter waves (F waves) at a rate typically around 300 bpm are visible, with ventricular responses occurring regularly due to a consistent AV conduction ratio (e.g., 2:1, 3:1). *Atrial Fibrillation* - This rhythm is characterized by **irregularly irregular R-R intervals** and the absence of discrete P waves, with **fibrillatory waves** (f waves) that are chaotic and variable in morphology. - The provided ECG clearly shows distinct, regular **F waves** (sawtooth pattern), which is not typical for atrial fibrillation. *Multifocal Atrial Tachycardia* - Identified by at least **three different P wave morphologies** and irregular R-R intervals, with an atrial rate typically over 100 bpm. - The ECG in question shows uniform atrial waves (F waves), not multiple P wave morphologies. *Atrial Flutter with Variable Block* - This would present with an **irregular ventricular rhythm** (irregular R-R intervals) because the AV node blocks an inconsistent number of flutter waves. - The ECG clearly demonstrates **regular R-R intervals**, ruling out a variable block.

Q: The S2 heart sound is best appreciated in:

2nd right intercostal space. ***2nd right intercostal space*** - The **S2 heart sound** is produced primarily by the closure of the **aortic and pulmonic valves** [1]. - The **aortic component (A2)** is best heard at the **right upper sternal border** (2nd right intercostal space), where the aorta is closest to the chest wall [2]. *4th left intercostal space* - This area is typically associated with the **tricuspid valve area**, where tricuspid murmurs and S3/S4 sounds related to the right ventricle can be more prominent. - While heart sounds can be heard here, it is not the primary location for appreciating the S2 sound. *5th left intercostal space* - This is the **mitral area** or **apex**, where the apical impulse is felt and the S1 heart sound (mitral component) is best heard [2]. - The S2 sound is much less prominent here compared to the base of the heart. *3rd left intercostal space* - This is often referred to as **Erb's point**, where murmurs of both aortic and pulmonic origin can sometimes be heard. - While S2 can be heard here, the **2nd right intercostal space** is superior for primarily appreciating the aortic component of S2, and the 2nd left intercostal space for the pulmonic component [2].

Q: Erb's Point in cardiology refers to:

Left sternal border at 3rd intercostal space. ***Left sternal border at 3rd intercostal space*** - **Erb's point** is a key auscultation site located at the **third intercostal space** along the **left sternal border**. - This location is particularly important because sounds from the **aortic** and **pulmonic valves** can often be heard here, as well as murmurs like the murmur of **aortic regurgitation**. *Right 2nd intercostal space* - The **right second intercostal space** at the sternal border is the primary auscultation site for the **aortic valve**. - While aortic sounds are heard at Erb's point, this specific location is not referred to as Erb's point. *Left 2nd intercostal space* - The **left second intercostal space** at the sternal border is the primary auscultation site for the **pulmonic valve**. - It is used to best hear sounds related to the pulmonary circulation, rather than being Erb's point. *Right 3rd intercostal space* - The **right third intercostal space** at the sternal border is not a primary or named auscultation point in the standard set of cardiology landmarks. - Auscultation in this area would primarily involve sounds transmitted from adjacent valve areas.

Q: Which of the following is the MOST common complication of untreated hypertension?

Stroke. ***Stroke*** - **Untreated hypertension** is a major risk factor for both **ischemic** and **hemorrhagic strokes**, damaging blood vessels in the brain [1]. - Sustained high blood pressure can lead to **atherosclerosis** and weakened blood vessel walls, increasing the likelihood of a stroke [1]. *Heart failure* - While hypertension is a leading cause of **heart failure**, it typically develops over a longer period as the heart works harder against elevated pressure, leading to remodeling and dysfunction [2]. - In terms of acute, severe complications, a stroke is often considered more immediately catastrophic. *Kidney damage* - **Hypertensive nephropathy** is a significant long-term complication where high blood pressure damages the small blood vessels in the kidneys, impairing their function. - This process is gradual and contributes to **chronic kidney disease**, but stroke often emerges as a more common and acute serious event. *Vision loss* - **Hypertensive retinopathy** involves damage to the blood vessels in the retina, which can lead to vision problems including **vision loss** or **blindness**. - This is a serious complication, but **stroke** generally has a higher prevalence and more immediate impact in terms of overall morbidity and mortality associated with untreated hypertension.

Q: A hypertensive patient who is non-compliant with medication presents to you with sudden onset breathlessness. His blood pressure is 190/110 mmHg and oxygen saturation is 88% on room air. A chest x-ray was done, which is shown below. How will you manage this patient?

Intravenous nitroglycerin. ***Intravenous nitroglycerin*** - The chest X-ray shows diffuse bilateral infiltrates and **cardiomegaly**, consistent with **pulmonary edema** due to **acute decompensated heart failure** in a hypertensive patient. - **Intravenous nitroglycerin** is crucial for patients with acute cardiogenic pulmonary edema who are hypertensive or otherwise hemodynamically suitable (i.e., without hypotension or other nitrate contraindications), as it **reduces preload and afterload**, thereby decreasing pulmonary congestion and improving breathlessness. *Intravenous salbutamol* - **Salbutamol** is a **bronchodilator** used for bronchospasm in conditions like asthma or COPD. - It would not address the underlying pathology of **pulmonary edema** and could potentially worsen the condition by causing **tachycardia** and increasing myocardial oxygen demand. *Nebulization with salbutamol* - Similar to intravenous salbutamol, nebulized salbutamol is used for **bronchospasm** and is ineffective in treating **cardiogenic pulmonary edema**. - There is no indication of airway constriction, and its systemic effects could paradoxically **exacerbate heart failure**. *Oxygen and antibiotics* - While **oxygen** is always indicated for hypoxemia, it alone is insufficient to manage severe **pulmonary edema**. - **Antibiotics** are used to treat bacterial infections, but there are no signs of infection (e.g., fever, purulent sputum) to suggest **pneumonia** as the primary cause of breathlessness; the X-ray findings are more typical of edema.

Q: Which type of cardiomyopathy is associated with alcohol abuse?

Dilated cardiomyopathy. ### Dilated cardiomyopathy - Chronic **alcohol abuse** is a well-established cause of **dilated cardiomyopathy**, leading to weakening and enlargement of the ventricles [1]. - This condition results in impaired systolic function and can cause **heart failure** [1]. *Hypertrophic cardiomyopathy* - This condition is primarily characterized by **pathological thickening of the heart muscle**, often genetic, and is not directly caused by alcohol abuse. - It leads to issues with relaxation and filling of the heart, rather than dilation and weakness. *Pericarditis* - **Pericarditis** is the inflammation of the sac surrounding the heart (pericardium), most commonly caused by viral infections, autoimmune diseases, or injury. - It is not directly linked to alcohol abuse as a primary cause. *Myocarditis* - **Myocarditis** is the inflammation of the heart muscle, often triggered by viral infections, autoimmune reactions, or certain medications. - While heavy alcohol use can weaken the heart, myocarditis is primarily an inflammatory process not directly caused by alcohol.

Q: Identify the cardiac condition represented in the image.

Ventricular tachycardia. ***Ventricular tachycardia*** - The image displays a **wide, regular QRS complex tachycardia**, which is most consistent with **ventricular tachycardia (VT)**. - The QRS complexes are broad and bizarre, and the overall morphology favors a ventricular origin. Note that SVT with aberrancy or pre-excitation can also produce a wide-complex tachycardia; however, an undifferentiated regular wide-complex tachycardia should be managed as VT unless a supraventricular mechanism is clearly established. *Atrial fibrillation* - **Atrial fibrillation** is characterized by an **irregularly irregular rhythm** with the absence of distinct P waves and varying R-R intervals. - The rhythm shown in the image is regular, which rules out atrial fibrillation. *Atrial flutter* - **Atrial flutter** typically presents with a "sawtooth" pattern of **flutter waves** in specific leads (e.g., II, III, aVF) and a regular or irregular ventricular response, often with a 2:1 or 3:1 block. - The image does not show these characteristic flutter waves. *Supraventricular tachycardia* - **Supraventricular tachycardia (SVT)** usually presents with a **narrow QRS complex** and a regular rhythm, originating from above the ventricles. SVT with aberrancy or pre-excitation can, however, produce wide QRS complexes that mimic VT. - The overall morphology in the image is most consistent with ventricular tachycardia rather than SVT with aberrancy.

Question 1

Treatment of asymptomatic bradycardia is

Accepted Answer

No treatment is required

Answer

Give atropine

Answer

Isoprenaline

Answer

Cardiac pacing

Question 2

The normal range for Ankle Brachial Pressure Index (ABI) is:

Accepted Answer

1.0-1.3 (Normal)

Answer

0.8-0.9 (Mild PAD)

Answer

0.5-0.8 (Moderate PAD)

Answer

>1.3 (Calcified arteries)

Question 3

LBBB is seen with all except

Accepted Answer

Hypokalemia (low potassium levels)

Answer

Acute Myocardial Infarction (MI)

Answer

Hyperkalemia (high potassium levels)

Answer

Ashman phenomenon (aberrant conduction in atrial fibrillation)

Question 4

A patient in regular rhythm presents with absent P waves on ECG. Which of the following is the most likely diagnosis based on the ECG findings?

Accepted Answer

Atrial Flutter with Fixed Block

Answer

Multifocal Atrial Tachycardia

Answer

Atrial Fibrillation

Answer

Atrial Flutter with Variable Block

Question 5

The S2 heart sound is best appreciated in:

Accepted Answer

2nd right intercostal space

Answer

4th left intercostal space

Answer

5th left intercostal space

Answer

3rd left intercostal space

Question 6

Erb's Point in cardiology refers to:

Accepted Answer

Left sternal border at 3rd intercostal space

Answer

Right 2nd intercostal space

Answer

Left 2nd intercostal space

Answer

Right 3rd intercostal space

Question 7

Which of the following is the MOST common complication of untreated hypertension?

Accepted Answer

Stroke

Answer

Kidney damage

Answer

Heart failure

Answer

Vision loss

Question 8

A hypertensive patient who is non-compliant with medication presents to you with sudden onset breathlessness. His blood pressure is 190/110 mmHg and oxygen saturation is 88% on room air. A chest x-ray was done, which is shown below. How will you manage this patient?

Accepted Answer

Intravenous nitroglycerin

Answer

Intravenous salbutamol

Answer

Nebulization with salbutamol

Answer

Oxygen and antibiotics

Question 9

Which type of cardiomyopathy is associated with alcohol abuse?

Accepted Answer

Dilated cardiomyopathy

Answer

Hypertrophic cardiomyopathy

Answer

Pericarditis

Answer

Myocarditis

Question 10

Identify the cardiac condition represented in the image.

Accepted Answer

Ventricular tachycardia

Answer

Atrial fibrillation

Answer

Atrial flutter

Answer

Supraventricular tachycardia

Cardiology — MCQs

Cardiology — MCQs

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