Accelerated Idioventricular Rhythm

ECG Features

Figure 1: ECG Strip[1]

Accelerated Idioventricular Rhythm (AIVR) occurs when "the rate of an ectopic ventricular pacemaker exceeds that of the sinus node."[2]

Table 1: ECG Characteristics[3]

Clinical Significance[4]

  • AIVR generally only lasts for a short time and rarely causes hemodynamic instability; thus, AIVR usually does not require treatment.
  • AIVR is often linked to underlying conditions such as myocardial ischemia-reperfusion, digoxin toxicity, and cardiomyopathies.

ECM Features

Figure 2: ECM Analysis of AIVR, Record 124[5][6]

Additional Information


  1. Accelerated Idioventricular Rhythm [Online image]. (2013). Retrieved July 19, 2016, from
  2. Accelerated Idioventricular Rhythm (AIVR). (n.d.). Retrieved July 27, 2016, from
  3. Accelerated Idioventricular Rhythm. (n.d.). Retrieved July 27, 2016, from
  4. Pezeshkian, N. G. (n.d.). Accelerated Idioventricular Rhythm. Retrieved August 08, 2016, from
  5. MIT-BIH Arrhythmia Database. (1980). Retrieved June, 2016, from
  6. Goldberger AL, Amaral LAN, Glass L, Hausdorff JM, Ivanov PCh, Mark RG, Mietus JE, Moody GB, Peng C-K, Stanley HE. PhysioBank, PhysioToolkit, and PhysioNet: Components of a New Research Resource for Complex Physiologic Signals. Circulation101(23):e215-e220 [Circulation Electronic Pages;]; 2000 (June 13).