Mechanisms of<unk> s The main pumping chamber, the ventricle, is protected (to a certain extent) against excessively high rates arising from the<unk>  areas by a "gating mechanism" at the atrioventricular node, which allows only a proportion of the fast impulses to pass through to the ventricles. An accessory "bypass tract" can avoid the AV node and its protection so that the fast rate may be directly transmitted to the ventricles. This situation has characteristic findings on ECG. A congenital heart lesion, Ebstein's anomaly, is most commonly associated with<unk> .
Supraventricular tachycardia
Tachycardia
Sinus arrhythmia
Ventricular tachycardia
Junctional tachycardia
Ectopic beat
Inappropriate sinus tachycardia
Ventricular flutter