Electrocardiogram recording showing slow atrial fibrillation with intermittent AV block with idioventricular
escape rhythm with right bundle branch block pattern
 The mechanism of the slow foetal heart rate is unclear, but may represent idioventricular
rates of the abnormal heart.
Some of VAs that occur almost directly at the moment of reperfusion (namely, ventricular premature beats and accelerated idioventricular
rhythms) are usually harmless and well tolerated ; however it has been reported that ventricular tachycardia and ventricular fibrillation occurring immediately after reperfusion remain the most important causes of sudden death following restoration of blood flow [156,157].
Arrhythmic events included extrasystoles, idioventricular
rhythm, and fibrillation, which ceased spontaneously.
(1) occult 2:1 A-V block in which an idioventricular
beat "retracts" an otherwise refractory barrier within the A-V node; (2) alternation between dissociated intranodal transmission pathways; and (3) "ventriculophasic" (vagal) depression of nodal conductivity.
Tambien se ha reportado en Holter de 24 h la presencia de extrasistoles ventriculares y auriculares, un caso de bloqueo sinoauricular con latido idioventricular
(24) y 2 reportes de adolescentes (2006-2009) con bloqueo auriculoventricular de segundo grado tipo Mobitz I (47,48), en el cual el intervalo PR aumenta progresivamente hasta que finalmente no se propaga el impulso auricular y se pierde el latido ventricular.
The most common arrhythmia during reperfusion is accelerated idioventricular
Atrial fibrillation (n = 2 subject-hours), atrial flutter (n = 2 subject-hours), atrioventricular block (n = 12 subject-hours), and accelerated idioventricular
rhythm (n = 50 subject-hours) were observed too infrequently to analyze; we calculated subject-hours, including SVT or VT, without regard to these rare events.
--Ventricular arrhythmias: accelerated idioventricular
rhythm, ventricular tachycardia, and ventricular fibrillation (VF).
Patients in Stage 5 CKD receiving dialysis treatments had the highest risk of cardiac arrhythmias, such as ventricular fibrillation, complete heart block, and accelerated idioventricular
Severe bradycardia, idioventricular
rhythms, ventricular arrhythmias and asystole are seen at higher serum levels (32,33).