On the double presystolic wave of the jugular tracing.
D000368:Aged; D005260:Female; D006327:Heart Block / Q000175:diagnosis; D006330:Heart Defects, Congenital / Q000175:diagnosis; D006801:Humans; D007601:Jugular Veins / Q000502:physiology*; D007702:Kinetocardiography; D008297:Male; D009200:Myocardial Contraction; D011674:Pulse; D013599:Systole