Idioventricular rhythm can be seen in and potentiated by various etiologies. It is a hemodynamically stable rhythm and can occur after a myocardial infarction during the reperfusion phase. Īccelerated idioventricular rhythm (AIVR) results when the rate of an ectopic ventricular pacemaker exceeds that of the sinus node with a rate of around 50 to 110 bpm and often associated with increased vagal tone and decreased sympathetic tone. Idioventricular rhythm is similar to ventricular tachycardia, except the rate is less than 60 bpm and is alternatively called a 'slow ventricular tachycardia.' When the rate is between 50 to 110 bpm, it is referred to as accelerated idioventricular rhythm. When ventricular rhythm takes over, it is essentially called Idioventricular rhythm. When the sinoatrial node is blocked or suppressed, latent pacemakers become active to conduct rhythm secondary to enhanced activity and generate escape beats that can be atrial itself, junctional or ventricular. J Am Coll Cardiol 2018 71:1063-74.Idioventricular rhythm is a slow regular ventricular rhythm, typically with a rate of less than 50, absence of P waves, and a prolonged QRS interval. Digoxin and mortality in patients with atrial fibrillation.
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