The heart's beating fast. What's going on?

The heart suddenly beats very quickly may be caused by factors such as tension, myocarditis, arrhythmia, etc. The specific analysis is as follows:

1. Tension

will cause sympathetic nerve excitation, resulting in increased myocardial contractility, causing accelerated blood circulation and increased heart rate, resulting in sudden heart beating.

2. Myocarditis

Myocarditis will cause myocardial congestion and edema, affecting myocardial contraction, resulting in decreased heart function, myocardial contraction disorder, and sudden heart beating.

3. Arrhythmia

Arrhythmia will cause heart beating frequency and arrhythmia, causing palpitations, resulting in sudden heart beating very fast.