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Samples in periodicals archive:
Clinically, second-degree block in the intrahisian or infrahisian system is indicative of impending high-grade or complete heart block, which may occur paroxysmally, and hemodynamic survival depends on the emergence of a low junctional (distal His), fascicular, or idioventricular rhythm.
Accelerated idioventricular rhythm (AIVR) is seen in up to 20% percent of patients with MI.
What allows the idioventricular rhythm to emerge and then disappear is sinus bradycardia with slight sinus arrhythmia.