Elderly people with 150 heartbeats may be caused by physiological reasons, such as emotional excitement, etc. It may also be caused by pathologic reasons, such as infection. It may also be caused by pathological reasons, such as infection, etc. It is recommended to go to the hospital in time to clarify the cause of the disease. Sinus tachycardia refers to the sinus rhythm frequency of more than 100 beats/min due to external stimuli or pathological factors, and is very common in clinical practice. The main clinical manifestations are increased heart rate, palpitations, shortness of breath and so on. Most patients have a good prognosis. 1. Physiological causes: physiological sinus tachycardia is seen in normal people after exercise, excitement, agitation, smoking, drinking alcohol and strong tea, which is a normal reaction of the human body. 2. Pathological causes: Pathological sinus tachycardia is seen in infection, fever, anemia, blood loss, hypotension, hypovolemia, shock, hypoxia, hyperthyroidism, respiratory insufficiency, heart failure, myocarditis and myocardial ischemia, etc., and the patient should go to the hospital in time to clarify the cause. In addition, supraventricular tachycardia, atrial fibrillation, etc. can lead to increased heart rate, which requires timely consultation for diagnosis and treatment. If the elderly have symptoms of discomfort, it is recommended to go to the hospital in time for treatment, do not self-medication, so as not to delay the condition or cause adverse reactions.