atrial premature systole (aps) - atrial premature contraction (apc) - electrocardiography (ecg) - el
Diagnostic criteria The impulse arises from an ectopic atrial focus, not from the sinus node (sinoatrial node). Since the impulse arises from an ectopic atrial focus, P wave of the atrial premature contraction (APC) has a different shape than that of the ...