The term that means "lack of electrical activity in the heart" is asystole.
Explanation:
1. Asystole is a medical condition characterized by the absence of electrical activity in the heart, leading to the heart's inability to contract and pump blood effectively.
2. It is considered a type of cardiac arrest where the heart stops beating and there is no heart rhythm on the electrocardiogram (ECG).
3. Asystole is a serious medical emergency that requires immediate intervention, such as cardiopulmonary resuscitation (CPR) and advanced cardiac life support (ACLS) protocols, to attempt to restore a normal heart rhythm and circulation.
