Accelerated idioventricular rhythm - Causes, Symptom, Cure, Treatment of Accelerated idioventricular rhythm
Synonyms and related keywords: AIVR, ventricular arrhythmia, slow ventricular tachycardia, VT, ventricular escape rhythm
What is Accelerated idioventricular rhythm?
Accelerated idioventricular rhythm (AIVR) is a form of ectopic or automatic ventricular arrhythmia. This disease is characterized by a ventricular rate that is slower than traditionally defined ventricular tachycardia (VT). A transient and intermittent type of arrhythmia with episodes lasting from a few seconds to a minute which usually occurs in patients with acute myocardial infarction or with digitalis toxicity. Accelerated idioventricular rhythms are often exhibited by patients following acute myocardial infarction.
Causes of Accelerated idioventricular rhythm
Accelerated idioventricular rhythm condition arises from subordinate or second-order pacemakers and manifests itself when the patient's prevailing sinus rate becomes lower than the accelerated rate of the otherwise suppressed focus. In this disease sinus bradycardia combined with enhanced automaticity of the subordinate site is the common pathophysiology.
Symptoms of Accelerated idioventricular rhythm
Followings are some noticable signs and symptoms of Accelerated idioventricular rhythm
- Presence of acute myocardial infarction: Patients with AIVR most commonly have a history of recent or concomitant chest pain or other features of evolving acute myocardial infarction
- Patients may have history of treatment with digoxin in the setting of ischemic cardiomyopathy, atrial fibrillation, or myocardial ischemia, and they may present with digoxin toxicity, which can manifest as AIVR
- Patients with AIVR may present with a slow pulse rate (bradycardia)
Discontinuation of offending agents is crucial. Other treatments include magnesium sulfate and overdrive pacing.