negative ventricular preexcitation wave

interventricular septum left ventricle right graph graphic electrode electrocardiograph ecg theory cardiovascular medicine cardiogram cardiac anatomy atrioventricular accessory pathway ventricular pre excitation wave old myocardial infarction pathological dilated cardiomyopathy hypertrophic organic heart disease human education recording heart heartbeat interval amplitude rate rhythm cardiology electrocardiography electrodes monitoring arrhythmia beat cardiac arrest depolarization diagnosis ekg electrocardiogram ventricle