The configuration of epicardial and endocardial extrasystoles in the chest leads.
NAHUM
L H
LH
HOFF
H E
HE
D005117:Cardiac Complexes, Premature; D004562:Electrocardiography; D004699:Endocardium; D006321:Heart; D006801:Humans
HEART/beat; HEART/electrocardiography