Cardiomyopathy

Cardiomyopathy disease of the heart muscle

Functional Classification of Primary Cardiomyopathies

Maneuver or Drug

Effect on Obstruction

Reasoning

Valsalva

Ý

ß preload (see above)

Leg Elevation

ß

Ý preload murmur will decrease

Standing

Ý

ß preload

b -Blockers

ß

ß contractility

Verapamil

ß

ß contractility

Digoxin

Ý

Ý contractility

Catecholamines (Dopamine + Isoproterenol)

Ý

Ý contractility

Amylnitrite

Ý

ß preload due to vasodilation and Ý contractility