Question:medium
Which murmur increases on standing?
Which murmur increases on standing?
Show Hint
Standing lowers preload; pick the murmur that worsens when the ventricle holds less blood.
Updated On: Jun 23, 2026
- HOCM
- MR
- MS
- VSD
Show Solution
The Correct Option is A
Solution and Explanation
Step 1: Use the rule that standing and Valsalva drop the amount of blood returning to and filling the left ventricle. Step 2: With less blood inside the chamber, the obstructed outflow tract in hypertrophic obstructive cardiomyopathy narrows further, intensifying the turbulent jet and making its murmur louder. Step 3: By the same logic of reduced preload, regurgitant and shunt murmurs such as MR, VSD and the flow across a stenotic mitral valve all soften because there is simply less blood to drive them. Step 4: The only murmur that grows on standing is therefore HOCM. \[\boxed{\text{HOCM}}\]
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