My heart's racing. What's going on?

1, mental stress

due to work pressure, overwork and other reasons, leading to mental stress, and then to brain nerve stimulation, causing brain nerve dysfunction, so that myocardial contractility enhanced, resulting in accelerated heartbeat.

2, hypertension

due to emotional overreaction, intake of excessive sodium salt and other reasons, resulting in increased blood volume, so that blood flow increases, increasing the burden on the heart, resulting in accelerated heartbeat.

3, coronary heart

disease is usually caused by arterial stenosis or occlusion, affected by it, leading to blood flow obstruction, resulting in myocardial ischemia, hypoxia, in order to maintain normal heart function, can appear accelerated heartbeat symptoms.