Dynamic electrocardiography. II. A crucial test of the electromechanical QRS wave theory.

The dynamic electromechanical electrocardiogram hypothesis, that QRS voltage fluctuations can be used as a simple noninvasive transducer of cardiac mechanical function, has been subjected to a crucial experiment. Under direct vision, transient modifications of the end-diastolic volume of the baboon heart were produced and photographed. Sequential… CONTINUE READING