A<unk>  is a defect in the conduction system of the heart, and is distinct from typical<unk><unk>  blocks due to its reliable, reproducible onset related to an increase in the rate of cardiac contraction.<unk>  can prevent both ventricles from contracting efficiently and can limit the cardiac output of the heart.
Tachycardia-dependent bundle branch block
Permanent junctional reciprocating tachycardia
AV nodal reentrant tachycardia
Second-degree atrioventricular block
Third-degree atrioventricular block
Junctional ectopic tachycardia
First-degree atrioventricular block
Atrioventricular reentrant tachycardia