<unk>  is a state of no cardiac electrical activity, hence no contractions of the myocardium and no cardiac output or blood flow.<unk>  is also known as a cardiac arrest rhythm in which there is no distinct electrical activity on ECG.  A (flat line) is another acronym for<unk> . In<unk> , the heart will not respond to defibrillation because it is already depolarized.
Asystole
Wide complex tachycardia
Junctional tachycardia
Junctional rhythm
Idioventricular rhythm
Junctional bradycardia
Narrow complex tachycardia
Right bundle branch block