Idioventricular rhythm (IVR) occurs when the SA and AV nodes are either NOT firing or firing slower than the ventricular pacemaker rate. A common ventricular pacemaker rate is 20-40 / minute, a rate that is often not sufficient to sustain an adequate cardiac output.
Slow ventricular rate and no P waves are key to diagnosis. Identification may be the key to myocardial infarction situations.
No treatment is needed without heart problems. For issues, beta blockers or calcium channel blockers may reduce heart rate, while catheter ablation is an option for severe cases.
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