Young man with exertional syncope who has a systolic ejection murmur at the left sternal border that increases with decreased preload โ> HOCM
Key idea: Only 2 heart murmurs that increase in intensity with decreased preload (sitting to standing, diuretics, etc.) are HOCM (decreased preload โ> increased obstruction) and Mitral valve prolapse (decreased preload โ> less taut chordae tendinae โ> earlier prolapse)
submitted by โstep_prep5(246)
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