ECG heart rate 108 beats/min is on the fast side. 1. On ECG, a heart rate of 108 beats/min is also known as sinus tachycardia, which may be caused by sympathetic excitation due to physiological factors such as exercise, emotion, agitation, and nervousness; it usually does not require any special treatment, and there is no need to worry too much. 2. Various infections, fever, hypoxia, dehydration, shock, heart failure, hyperthyroidism and other pathologic factors may also lead to the emergence of sinus tachycardia; if the use of epinephrine, isoproterenol and other sympathomimetic drugs, the ECG examination can also be tachycardia. It is recommended to go to the hospital in time for early and standardized treatment if the above symptoms appear due to pathological reasons.