<unk>  occurs when some electrical signals from the atria do not reach the ventricles, leading to dropped beats. More severe cases of<unk>  can turn into third-degree AV block.
Second degree AV block
Third degree AV block
First degree AV block
Mahaim type preexcitation
Fascicular VT
Lone atrial fibrillation
Wide complex tachycardia
AV reentrant tachycardia