<unk>  is a medical procedure used in the treatment of ventricular fibrillation or pulseless ventricular tachycardia under certain conditions. The procedure has a very low success rate, but may be used in those with witnessed, monitored onset of one of the "shockable" cardiac rhythms if a defibrillator is not immediately available. It should not delay cardiopulmonary resuscitation (CPR) and defibrillation, nor should it be used in those with unwitnessed out-of-hospital cardiac arrest.
Precordial thump
Intrinsicoid deflection
Apex beat
Right axis deviation
Pulsus alternans
Hyperdynamic precordium
Collapsing pulse
Ridged band