Key result
Pseudo SAM in hypertension peaks at end-systole, later than true SAM in HCM.
Observational (n=65)
Echocardiographic timing of systolic anterior motion distinguishes 'pseudo' SAM in hypertensive heart disease (peaking at end-systole) from 'true' SAM in hypertrophic cardiomyopathy (peaking earlier).
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SAM timing on echo may differentiate hypertensive pseudo-SAM from HCM; leaves open prospective validation before diagnostic adoption.
Doi et al. (1983) conducted an observational in Hypertensive heart disease and hypertrophic cardiomyopathy (n=65). Hypertensive heart disease vs. Hypertrophic cardiomyopathy was evaluated on Timing of peak systolic anterior motion. Pseudo systolic anterior motion in hypertensive patients peaked at end-systole, whereas true systolic anterior motion in hypertrophic cardiomyopathy peaked earlier, after two-thirds of systole.
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