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
ECG findings
ECG 1 Supraventricular extrasystole originating in the coronary sinus. Isolated premature atrial beat - 1st beat, with inverted P wave and narrow QRS complex.
ECG 2 Supraventricular extrasystoles (patient underwent RFA of frequent ectopy from RSPV)
ECG 3 Trigeminy - every second beat is followed by a supraventricular premature beat (purple S) - this beat is then followed by a noncompensatory pause (shorter than 2xPP)
ECG 4 Triplet of premature atrial beats. Normal sinus rhythm interrupted by three consecutive premature atrial beats - non-sustained atrial tachycardia
ECG no. 5 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
ECG findings
ECG 1 Supraventricular extrasystole originating in the coronary sinus. Isolated premature atrial beat - 1st beat, with inverted P wave and narrow QRS complex.
ECG 2 Supraventricular extrasystoles (patient underwent RFA of frequent ectopy from RSPV)
ECG 3 Trigeminy - every second beat is followed by a supraventricular premature beat (purple S) - this beat is then followed by a noncompensatory pause (shorter than 2xPP)
ECG 4 Triplet of premature atrial beats. Normal sinus rhythm interrupted by three consecutive premature atrial beats - non-sustained atrial tachycardia
ECG no. 5 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