Valvular Heart Disease Management — MCQs
The severity of mitral stenosis can be judged by-
In which clinical scenario would you find a patient requiring the vital signs assessment technique shown in the image?
A lady presents with grade 3 dyspnea, severe mitral stenosis, and atrial fibrillation, with an increased ventricular rate and a clot in the left atrium. Which of the following should not be done?
274. A young athlete was found to have hypertrophic cardiomyopathy during testing for a competitive sport. Which of the following maneuvers will increase the murmur?
A case of severe mitral stenosis is associated with all of the following features, EXCEPT:
A 59-year-old man with severe myxomatous mitral regurgitation is asymptomatic, with a left ventricular ejection fraction of 45% and an end-systolic diameter index of 2.9 cm/m2. The most appropriate treatment is
Most common cause of death in aortic stenosis patients is:
Ketamine is contraindicated in which of the following situations?
Most sensitive method of monitoring cardiovascular ischemia in the perioperative period is -
What is the initial management for a stable patient with atrial fibrillation?
Valvular Heart Disease Management Indian Medical PG Practice Questions and MCQs
Question 1: The severity of mitral stenosis can be judged by-
- A. Duration of murmur
- B. Intensity of murmur
- C. Presence of left ventricular S3
- D. Loud S1 (Correct Answer)
Explanation: ***Loud S1*** - A **loud S1** in mitral stenosis indicates that the **mitral valve leaflets are still mobile** and able to snap shut forcefully, which is characteristic of early to moderate stenosis [2]. - As mitral stenosis becomes more severe and the valve becomes calcified and rigid, the S1 sound may become diminished or even absent due to reduced leaflet mobility [1]. *Intensity of murmur* - The **intensity (loudness)** of the diastolic murmur in mitral stenosis **does not directly correlate with the severity** of the stenosis. - A loud murmur can be heard with mild stenosis, while a soft murmur in severe stenosis may be due to reduced cardiac output or left atrial pressure. *Duration of murmur* - While a **longer duration of the diastolic murmur** can coincide with more severe mitral stenosis, it is not as reliable a single indicator as other findings. - The duration is influenced by the pressure gradient across the valve and the length of diastole [2]. *Presence of left ventricular S3* - A **left ventricular S3** is typically associated with **left ventricular dysfunction** and volume overload, as seen in conditions like mitral regurgitation or dilated cardiomyopathy [3]. - It is **not a feature of mitral stenosis**, where the primary issue is obstruction to left ventricular filling.
Question 2: In which clinical scenario would you find a patient requiring the vital signs assessment technique shown in the image?
- A. Pulse absent, breath present
- B. Pulse and breath both not present
- C. Pulse and breath present
- D. Pulse present, breath absent (Correct Answer)
Explanation: ***Pulse present, breath absent*** - The image depicts a **mouth-to-mouth resuscitation** technique, specifically rescue breaths being administered by one person to another. - This technique is applied when a person has a **detectable pulse** but is **not breathing** or is only gasping, indicating respiratory arrest while the heart is still circulating blood. *Pulse absent, breath present* - This scenario would represent **cardiac arrest** where the heart has stopped, but the person is still attempting to breathe. This is a rare, transient state. - In such a case, the primary intervention would be **chest compressions**, not just rescue breathing, as circulation is the immediate priority. *Pulse and breath both not present* - This describes **cardiopulmonary arrest (CPA)**, where both the heart and lungs have ceased functioning. - The appropriate intervention is **cardiopulmonary resuscitation (CPR)**, which involves a combination of **chest compressions and rescue breaths (30:2 ratio)**, not just rescue breaths alone. *Pulse and breath present* - If both vital signs are present, the person is **conscious and breathing adequately**, or unconscious but breathing normally. - No advanced respiratory intervention like mouth-to-mouth resuscitation is needed; the priority would be maintaining their airway and monitoring their condition.
Question 3: A lady presents with grade 3 dyspnea, severe mitral stenosis, and atrial fibrillation, with an increased ventricular rate and a clot in the left atrium. Which of the following should not be done?
- A. Rate control with diltiazem
- B. Warfarin therapy
- C. Open mitral commissurotomy and removal of clot
- D. Electrical cardioversion (Correct Answer)
Explanation: ***Electrical cardioversion*** - Due to the presence of a **left atrial clot**, electrical cardioversion is contraindicated as it carries a high risk of **systemic embolism** if the clot dislodges. - Cardioversion should only be considered after **anticoagulation** and confirmation that no left atrial clot is present, typically via transesophageal echocardiography (TEE). *Rate control with diltiazem* - **Diltiazem** is a calcium channel blocker commonly used for **rate control in atrial fibrillation** by slowing AV nodal conduction [1]. - While rate control is important in this patient, especially with severe mitral stenosis, it does not directly address the immediate high risk of **embolism** from the clot [2]. *Warfarin therapy* - **Warfarin** is indicated for **anticoagulation** to prevent further clot formation and reduce the risk of embolism in patients with atrial fibrillation and a documented left atrial clot [2]. - However, warfarin itself will not acutely resolve an existing clot or address the immediate hemodynamic issues, and it requires a therapeutic INR before interventions like cardioversion can be considered. *Open mitral commissurotomy and removal of clot* - **Open mitral commissurotomy** is a surgical procedure to address severe mitral stenosis and can simultaneously allow for direct removal of a **left atrial clot**. - While this is a definitive treatment for both the stenosis and the clot, it is an invasive surgical option and not something to "not be done" if indicated, although risks need to be weighed.
Question 4: 274. A young athlete was found to have hypertrophic cardiomyopathy during testing for a competitive sport. Which of the following maneuvers will increase the murmur?
- A. Handgrip
- B. Valsalva maneuver (Correct Answer)
- C. Squatting
- D. Leaning forward
- E. Passive leg raise
Explanation: **Valsalva maneuver** - The **Valsalva maneuver** reduces **preload** by decreasing venous return to the heart. - A decrease in preload reduces the left ventricular chamber size, which in turn exacerbates the **left ventricular outflow tract (LVOT) obstruction** characteristic of hypertrophic cardiomyopathy (HCM), thereby **increasing the intensity of the murmur**. *Handgrip* - **Handgrip** is an isometric exercise that leads to an increase in **afterload** and **peripheral vascular resistance**. - Increased afterload causes the left ventricle to eject blood against higher pressure, which **enlarges the left ventricular chamber** and **reduces the LVOT obstruction**, thus **decreasing the intensity of the murmur** in HCM. *Squatting* - **Squatting** increases both **preload** (due to increased venous return) and **afterload** (due to increased peripheral vascular resistance). - The increased preload and afterload lead to an **increased left ventricular volume**, which **reduces the LVOT obstruction** and therefore **decreases the intensity of the murmur** in HCM. *Passive leg raise* - **Passive leg raise** increases **preload** by increasing venous return to the heart from the lower extremities. - The increased preload leads to an **increased left ventricular chamber size**, which **reduces the LVOT obstruction** and therefore **decreases the intensity of the murmur** in HCM. *Leaning forward* - Leaning forward during auscultation is typically used to better hear **aortic regurgitation murmurs**, as it brings the aorta closer to the chest wall. - This maneuver does not significantly alter **cardiac preload or afterload** in a way that would consistently increase the murmur of hypertrophic cardiomyopathy.
Question 5: A case of severe mitral stenosis is associated with all of the following features, EXCEPT:
- A. Atrial fibrillation
- B. Increase in the length of murmur
- C. Pulsatile liver
- D. Opening snap delayed from S2 (Correct Answer)
Explanation: ***Opening snap delayed from S2*** - In severe mitral stenosis, the opening snap (OS) occurs **earlier** after S2 because the left atrial pressure (LA) is very high and rapidly exceeds the left ventricular pressure (LV), forcing the stiff mitral valve to open sooner. [1] - A **delayed opening snap** from S2 would suggest less severe mitral stenosis, as it takes longer for the LA pressure to overcome the LV pressure. [3] *Pulsatile liver* - This finding suggests **tricuspid regurgitation**, which can occur due to right heart failure secondary to severe pulmonary hypertension from long-standing severe mitral stenosis. [1] - The pulsatile liver is caused by retrograde flow through the incompetent tricuspid valve into the hepatic veins and inferior vena cava. *Atrial fibrillation* - Severe mitral stenosis often leads to significant **left atrial enlargement** and increased left atrial pressure, which are major predisposing factors for the development of atrial fibrillation. [1] - Atrial fibrillation further complicates mitral stenosis by reducing left ventricular filling and can lead to systemic embolization. [2] *Increase in the length of murmur* - A longer diastolic murmur in mitral stenosis indicates a longer duration of blood flow across the stenotic valve, which is characteristic of **more severe stenosis**. [1] - As the stenosis worsens, the pressure gradient across the mitral valve during diastole is sustained for a longer period.
Question 6: A 59-year-old man with severe myxomatous mitral regurgitation is asymptomatic, with a left ventricular ejection fraction of 45% and an end-systolic diameter index of 2.9 cm/m2. The most appropriate treatment is
- A. Mitral valve repair or replacement (Correct Answer)
- B. ACE inhibitor therapy
- C. Digoxin and diuretic therapy
- D. Observation without intervention
Explanation: ***Mitral valve repair or replacement*** - The patient has severe asymptomatic **myxomatous mitral regurgitation** with a **left ventricular ejection fraction (LVEF) of 45%** (below 60%) and an **end-systolic diameter index (ESDI) of 2.9 cm/m²** (approaching or exceeding 40 mm, which is a common absolute ESLD threshold). These are key indicators for surgical intervention. [1] - Severe mitral regurgitation, even in an asymptomatic patient, warrants intervention when there is evidence of **LV dysfunction or significant LV dilation**, as these predict worse outcomes with medical management alone. [1] *ACE inhibitor therapy* - While ACE inhibitors can be used in some patients with mitral regurgitation to reduce afterload, they are generally reserved for those with **symptomatic heart failure** or **contraindications to surgery**. - They are not considered definitive treatment for severe mitral regurgitation with objective signs of LV dysfunction or dilatation requiring surgical correction. *Digoxin and diuretic therapy* - **Digoxin** is primarily used for rate control in atrial fibrillation or in heart failure with reduced ejection fraction, but it does not address the underlying mechanical problem of severe mitral regurgitation. - **Diuretics** can help manage fluid overload and symptoms of heart failure, but they do not prevent or reverse the progressive ventricular dysfunction caused by severe regurgitation, and are insufficient as sole therapy in this scenario. *Observation without intervention* - **Asymptomatic severe mitral regurgitation can be observed** if the LVEF is preserved (typically >60%) and the LV dimensions are normal or very minimally dilated (e.g., end-systolic diameter <40 mm or ESDI <2.0 cm/m²). - However, this patient's **LVEF of 45%** and **ESDI of 2.9 cm/m²** indicate early LV dysfunction and remodeling, which are clear triggers for intervention to prevent irreversible myocardial damage. [1]
Question 7: Most common cause of death in aortic stenosis patients is:
- A. Pulmonary edema
- B. Cerebral embolism
- C. Sudden cardiac death (Correct Answer)
- D. Atrial flutter
Explanation: ***Sudden cardiac death*** - **Sudden cardiac death** is a significant risk in patients with severe **aortic stenosis**, even before the onset of classic symptoms such as angina, syncope, or heart failure. - The mechanisms often involve ventricular arrhythmias due to **myocardial fibrosis**, hypertrophy, and increased wall stress stemming from the outflow obstruction. *Pulmonary edema* - While patients with severe **aortic stenosis** can develop **pulmonary edema** due to left ventricular failure, it is typically a marker of advanced disease and usually precedes or is associated with other symptoms. - **Sudden cardiac death** can occur without prior severe pulmonary edema, making it the most common immediate cause of death. *Cerebral embolism* - **Paradoxical embolism** can occur in patients with **aortic stenosis** if they also have a **patent foramen ovale** and right-to-left shunting, or if infective endocarditis is present, but it is not the most common cause of death. - Atheroembolization from a calcified aortic valve is also a possibility but ranks lower than sudden cardiac death. *Atrial flutter* - **Atrial arrhythmias** like **atrial flutter** can occur in **aortic stenosis** due to atrial dilation and fibrosis, which can lead to rapid ventricular rates and worsen symptoms. - However, **atrial flutter** itself is usually not a direct cause of death; rather, it can precipitate heart failure or contribute to stroke risk, but **sudden cardiac death** due to ventricular arrhythmias is more prevalent.
Question 8: Ketamine is contraindicated in which of the following situations?
- A. For analgesia & sedation
- B. Obstetric hemorrhage
- C. Status asthmaticus
- D. Ischemic heart disease (Correct Answer)
Explanation: ***Ischemic heart disease*** - **Ketamine** causes a dose-dependent increase in **heart rate**, **blood pressure**, and **myocardial oxygen demand** due to sympathetic stimulation. - In patients with **ischemic heart disease**, this increased demand can precipitate **myocardial ischemia** or infarction, making it a contraindication. *Status asthmaticus* - **Ketamine** is often beneficial in **status asthmaticus** due to its **bronchodilatory effects**, resulting from direct smooth muscle relaxation and sympathetic stimulation. - It can be a useful alternative when conventional bronchodilators fail to relieve severe bronchospasm. *For analgesia & sedation* - **Ketamine** is widely used for both **analgesia** and **sedation**, particularly in emergency medicine and procedural sedation. - It provides **dissociative anesthesia**, profound pain relief, and maintenance of airway reflexes, making it a valuable agent. *Obstetric hemorrhage* - **Ketamine** can be safely used in **obstetric hemorrhage** as it maintains **uterine tone** and does not relax the uterus, unlike many other anesthetic agents. - This property makes it a preferred choice for anesthesia in parturients with significant bleeding or during Cesarean sections where uterine contraction is crucial.
Question 9: Most sensitive method of monitoring cardiovascular ischemia in the perioperative period is -
- A. NIBP
- B. ECG
- C. Pulse oximeter
- D. TEE (Correct Answer)
Explanation: ***TEE*** - **Transesophageal echocardiography (TEE)** is the most sensitive method for detecting perioperative myocardial ischemia because it can visualize **regional wall motion abnormalities** and changes in **ventricular function** much earlier than ECG. - **Ischemia** directly impairs the contractility of the affected myocardium, leading to subtle changes in wall motion that TEE can identify. *NIBP* - **Non-invasive blood pressure (NIBP)** monitoring can detect **hemodynamic changes** (like hypotension or hypertension) that may precede or accompany ischemia. - However, these changes are **non-specific** and occur relatively late, making NIBP a less sensitive indicator of early ischemia. *ECG* - **Electrocardiography (ECG)** monitors the electrical activity of the heart and can detect **ST-segment changes** indicative of ischemia. - While useful, ECG changes may appear later than wall motion abnormalities, and **silent ischemia** can be missed if the leads are not optimally placed or if the ischemia does not produce significant electrical changes. *Pulse oximeter* - A **pulse oximeter** measures **oxygen saturation** in the peripheral blood. - It is primarily used to assess **respiratory function** and tissue oxygenation, and it does not directly monitor myocardial ischemia or cardiac function.
Question 10: What is the initial management for a stable patient with atrial fibrillation?
- A. Rate control (Correct Answer)
- B. Rhythm control
- C. Anticoagulation
- D. Cardioversion
Explanation: Rate control - In a **stable patient** with **atrial fibrillation**, the primary goal is to control the **ventricular rate** to alleviate symptoms and improve cardiac output [1]. - This is typically achieved using medications like **beta-blockers** or **calcium channel blockers** [1]. *Rhythm control* - While rhythm control aims to restore and maintain normal sinus rhythm, it is usually considered after initial rate control or in patients who remain symptomatic despite adequate rate control [1]. - It involves strategies like electrical cardioversion or antiarrhythmic drugs. *Anticoagulation* - Anticoagulation is crucial for preventing **thromboembolic events** in patients with atrial fibrillation, but it is not the initial management strategy for hemodynamic stability [1]. - The decision for anticoagulation is based on the patient's **CHA2DS2-VASc score** [1]. *Cardioversion* - **Electrical cardioversion** is reserved for **hemodynamically unstable** patients with atrial fibrillation or those in whom rhythm control is the primary goal after anticoagulation and/or rate control. - It is not the initial step for a stable patient as it requires sedation and is associated with potential risks [1].
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