A 32-year-old lady with HCM attends a cardiology clinic.
A 32-year-old lady with HCM attends a cardiology clinic. You are unable to auscultate a murmur and ask her to perform a Valsalva manoeuvre. The murmur then becomes more clearly audible. Which of the following explains the physiology of this manoeuvre?
Select the SINGLE most appropriate option from the list below. Select ONE option only.
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