Accelerated Idioventricular Rhythm
AIVR has been associated with drugs like halothane, desflurane, cocaine and digitalis [2].
Idiopathic AIVR
Idiopathic AIVR originating from the right bundle branch has been described as an unusual type of ventricular arrhythmia [3]. Two of their 8 patients had syncope and 3 had left ventricular dysfunction. Metoprolol was useful in decelerating the arrhythmia and relieving symptoms. Five patients underwent electrophysiological study and catheter ablation. Right bundle branch block morphology was noted in sinus rhythm after ablation. Left ventricular function normalized after ablation and symptoms were controlled.
References
- Andres Ricardo Perez Riera, Raimundo Barbosa Barros, Francisco Daniel de Sousa, Adrian Baranchuk. Accelerated idioventricular rhythm: history and chronology of the main discoveries. Indian Pacing Electrophysiol. J. 2010;10(1):40-48.
- Pardee HEB. An electrocardiographic sign of coronary artery obstruction. Arch Intern Med 1920; 26: 244– 257.
- Minglong Chen, Kai Gu, Bing Yang, Hongwu Chen, Weizhu Ju, Fengxiang Zhang, Gang Yang, Mingfang Li, Xinzheng Lu, Kejiang Cao, Feifan Ouyang. Idiopathic accelerated idioventricular rhythm or ventricular tachycardia originating from the right bundle branch: unusual type of ventricular arrhythmia. Circ Arrhythm Electrophysiol. 2014 Dec;7(6):1159-67.