Answer: "all stars": An outstanding or respected performer in a field. Heartbeat: One complete heartbeat.
Explanation:
A heartbeat is when the heart contracts to pump blood to the lungs and the rest of the body. The heart's electrical system determines how fast the heart beats. The heart's rhythm is controlled by a natural pacemaker (the sinus node) in the right upper chamber (atrium). Sinus nodes usually send an electrical signal that triggers each heartbeat. These electrical signals travel through the atria, causing the heart muscle to contract (contract) to pump blood into the ventricles.
Confusion of words: heartbeat versus heartbeat. ... "how fast your heart beats" makes much more sense. If you need a noun and only a noun, you need a heartbeat. One word: "the beating of the victim's heart" or "the beating of her devotee" - two completely different words.