Introduction
Premature atrial contraction = Supraventricular extrasystole (SVES) is an extra heartbeat caused by electrical activation of the atria from an abnormal site before a normal heartbeat would occur.
Also known as premature atrial complex, atrial extrasystole, atrial premature beat (APB), supraventricular premature beat.
SVES may be caused by one of several mechanisms- re-entry, automaticity or triggered activity. They originate in any part of the heart above the ventricles apart from sinoatrial node – including AV node or His bundle.
Classification
Bigeminy – every sinus beat is followed by APB
ECG findings
ECG 1 Supraventricular extrasystoles with RBBB morphology. In leads V1-V6 bigeminy – every sinus beat is followed by an extrasystole with RBBB morphology - 3rd beat – SVES
Management
References
Introduction
Premature atrial contraction = Supraventricular extrasystole (SVES) is an extra heartbeat caused by electrical activation of the atria from an abnormal site before a normal heartbeat would occur.
Also known as premature atrial complex, atrial extrasystole, atrial premature beat (APB), supraventricular premature beat.
SVES may be caused by one of several mechanisms- re-entry, automaticity or triggered activity. They originate in any part of the heart above the ventricles apart from sinoatrial node – including AV node or His bundle.
Classification
Bigeminy – every sinus beat is followed by APB
ECG findings
ECG 1 Supraventricular extrasystoles with RBBB morphology. In leads V1-V6 bigeminy – every sinus beat is followed by an extrasystole with RBBB morphology - 3rd beat – SVES
Management
References