Accelerated idioventricular rhythm

AIVR is a rhythm from the ventricles that is faster than the usual ventricular escape rhythm, but not as fast as ventricular tachycardia. AIVR is like a slow version of VT, but not nearly as serious.

AIVR is usually regular, 50-110bpm, with wide QRS complexes. Fusion and capture beats may be present.

AIVR occurs when an ectopic ventricular pacemaker is faster than the sinus node. It is generally considered benign and self-limiting, although recent reports have suggested it might carry a slightly worse prognosis.

See also: Ventricular Rhythms

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References

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    In the ECGquest archives, this ECG has been tagged with: - 12-Lead Absent P waves Peaked T waves Accelerated idioventricular rhythm Hyperkalemia EMergucate CC-BY-NC-SA
    ECG of the Week Interpretation – March 20th 2019

    This ECG is from a man in his 60s who presented with fever and delirium. He has a history of renal failure, T2DM and cognitive impairment.

    This ECG shows accelerated idioventricular rhythm with peaked T waves due to hyperkalemia.

    In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea Fatigue Serial 12-lead Accelerated idioventricular rhythm Spontaneous coronary artery dissection Dr Smith's ECG Blog CC BY-NC
    Incredible case of evolution of terminal QRS distortion, then resolution after thrombolytics 2

    This ECG is from a man in his 60s who presented with chest pain radiating down his left arm and 2 days of exertional dyspnoea and fatigue.

    This ECG shows anterior ST elevation with terminal QRS distortion. At 16:56 there is also a LBBB. The cause was Spontaneous coronary artery dissection (SCAD) of the mid LAD.

    In the ECGquest archives, this ECG has been tagged with: - 12-Lead Fusion beat Normal rate Regular Right Axis Deviation Wide QRS Accelerated idioventricular rhythm Acute Anterior MI Dr Smith's ECG Blog CC BY-NC
    Chest pain and precordial ST depression which resolve, followed by a wide complex rhythm. T= 2h 9 min
    In the ECGquest archives, this ECG has been tagged with: - 12-Lead Accelerated idioventricular rhythm Dr Smith's ECG Blog CC BY-NC
    An adolescent with trauma, chest pain, and a wide complex rhythm