title: Echocardiographic features of pulsus alternans during right ventricular pacing in man.
mesh_terms: D000328:Adult; D006328:Cardiac Catheterization; D003327:Coronary Disease / Q000503:physiopathology; D004452:Echocardiography; D006321:Heart / Q000503:physiopathology; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D010138:Pacemaker, Artificial; D011674:Pulse