Overview
Accelerated idioventricular rhythm (AIVR) is an abnormal ventricular rhythm characterized by rapid, usually regular, wide QRS complexes originating from the ventricles without atrioventricular synchrony, often seen in acute ischemic or non-ischemic cardiomyopathies 12.Diagnosis
Electrocardiogram (ECG) essential for identification of wide QRS complexes at a rate typically >100 bpm 12.
Differential diagnosis includes ventricular tachycardia; careful analysis of QRS morphology and absence of P waves aids differentiation 1.
Monitoring for hemodynamic stability is crucial; AIVR may be tolerated or may indicate severe underlying pathology 1.Management
Hemodynamically unstable patients require immediate cardioversion 1.
Stable patients may be managed medically with antiarrhythmic drugs like lidocaine (1-2 mg/kg IV bolus, followed by infusion of 25-50 mcg/kg/min) to control ventricular rate 1.
Adjunctive treatment includes monitoring for and addressing underlying causes such as ischemia or electrolyte imbalances 1.Special Populations
No specific data provided in the abstracts regarding pregnancy, pediatrics, elderly, or comorbidities related to AIVR management 12.Key Recommendations
Perform immediate ECG for diagnosis and differentiation from other ventricular arrhythmias (Evidence: Expert opinion) 1.
Initiate cardioversion for hemodynamically unstable patients with AIVR (Evidence: Expert opinion) 1.
Consider intravenous lidocaine for rate control in stable patients with AIVR (Evidence: Expert opinion) 1.References
1 Wood NA, Patronik NA, Zenati MA, Riviere CN. Fourier modeling of porcine heartbeat and respiration in vivo for synchronization of HeartLander robot locomotion. Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference 2011. link
2 Kohl J, Koller EA, Jäger M. Relation between pedalling- and breathing rhythm. European journal of applied physiology and occupational physiology 1981. link