The electrical impulses responsible for the cardiac cycle that appear on an electrocardiogram as peaks and valleys are called ____.

A) electrodes
B) styluses
C) leads
D) deflections
E) probes

Electrocardiogram

A test that records the electrical activity of the heart over a period of time, used to detect heart abnormalities.

Electrical Impulses

Quick bursts of electricity generated by neurons to transmit signals within the body.

Deflections

Movements or shifts off a predetermined path or direction, often used in physical and engineering contexts.