Waking up to an alarm clock with a rapid heartbeat may be caused by sympathetic nerve excitation after the shock.
If a person is suddenly woken up by an alarm clock during sleep, the sympathetic nerves can be stimulated due to the shock, and when the sympathetic nerves are in a state of excitement, it will lead to an increase in the contraction force of the heart muscle, and the heart beats faster, which is a normal phenomenon, and most of the time, it can be relieved by being quiet for a few minutes.
In most cases, a few minutes of silence can relieve the phenomenon. In order to ensure a better night’s sleep, it is recommended that non-essential alarm clocks be turned off in a timely manner. If the rapid heartbeat can not be relieved for a long time, you need to go to the regular hospital to see a doctor, to clarify the cause, to exclude the possibility of arrhythmia, if you need treatment, should be standardized under the guidance of the doctor, so as to avoid delaying the condition of the body to bring about adverse effects.
If the repeated rapid heartbeat can not be relieved, it is recommended to consult a doctor to avoid delaying the condition.