Block, P.

exercise patient subject surface artery disease change precordial electrocardiogram disease amplitude heart rate heart system artery r wave changes segment measurement american journal circulation value exercise electrocardiography body surface analysis percent sensitivity chest surface maps block s-t segment figure volume repolarization pattern computer distribution depolarization electrocardiography specificity body surface maps potential testing group infarction precordial potentials cardiology peak exercise study right combination mapping peak heart rate 1 st minute journal location p wave electrocardiographic criteria cardiol exercise electrocardiogram s-t amplitude table american approach difference 78/87 rotterdam exercise electrocardiography-simoons minimum region depression magnitude level utrecht body surface data s-t segment changes 90 percent qrs changes 60 ms exercise testing ischemia