Basic Concepts of EKG- A Simplified Approach by Nair Harilal K

Author:Nair, Harilal K [Nair, Harilal K]
Language: eng
Format: mobi, azw3, pdf, epub
Publisher: APRN World
Published: 2012-12-04T05:00:00+00:00

Accelerated Idioventricular Rhythm (AIVR)

Accelerated Idioventricular rhythm originates due to abnormal automaticity within the ventricle and produce impulse at 40 to 120 bpm. It can be seen in the absence of any structural heart disease or in the event of acute myocardial infarction, cocaine toxicity, digoxin intoxication, postoperative cardiac surgery or after chemical or mechanical revascularization of coronary arteries as in tPA administration and coronary angioplasty. In these settings, it is also known as reperfusion arrhythmia.

The basic characteristics that differentiate AIVR from that of slow V-tach are its gradual onset and termination with a brief self-limiting pattern. In order to differentiate Idioventricular rhythm (IVR) from accelerated Idioventricular rhythm (AIVR), look for presence of P waves in AIVR that is absent in Idioventricular escape rhythm. Remember in AIVR, SA node is still firing unlike in IVR where there is no higher order pacemaker functioning.

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