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A simple method of recording low-frequency precordial movements is presented and termed kineto-cardiogram to indicate movements as the result of the motions of the heart. The normal precordial patterns are described as well as the time relationships to the cardiac cycle and ballistocardiogram. S TUDIES of the graphic representation of the apex beat are well(More)
ATYPICAL features of location, quality, time course, radiation, precipitating and ameliorating factors of angina pectoris evoke in the clinician a desire for objective evidence to aid in this sometimes difficult diagnosis. Interest in the electrocardiographic response to exercise of subjects with and without angina pectoris is a manifestation of this(More)