Accelerated Idioventricular Rhythm (AIVR)
Report:
Accelerated idioventricular rhythm (AIVR) 88/min
Comment:
The RRâ complexes with taller left rabbit ear in V1, the bizarre (indeterminate, northwest, nonsense) axis and the QRS duration of > 0.16â establish the ectopic ventricular origin of this rhythm. It is most likely a manifestation of digoxin effect on subsidiary pacemakers in this patient with renal failure.
Some authors still apply the oxymoronic designation of slow VT to it. For descriptive purposes, nothing below the rate of 100/min should be called tachycardia.
The atrial rhythm is, probably, atrial fibrillation; the patient reverted to it after digoxin was stopped (Fig 194a).
194a.
195. 70 year old man following cardiac arrest at home. Admission ECG showed acute inferior MI.
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