Is it unhealthy for adults to keep their heart rate around 90 per minute for a long time?

A heart rate exceeding 100 beats per minute is called tachycardia, and a heart rate below 60 beats is called bradycardia. Tachycardia can attract people's attention, but in clinical work, bradycardia is often ignored by people, especially young people. Many people say that a slow heartbeat means good health. Of course, if he is energetic, it is the result of regular exercise, which is normal, but some people are often depressed, which will attract special attention. Pathological bradycardia may develop further if it is not corrected in time, affecting normal life and endangering life. The heart rate of normal adults is between 60- 100 beats per minute. More than 100 times is called tachycardia and less than 60 times is called bradycardia. People who exercise for a long time, athletes or heavy manual workers, although their heart rate is only 50-60 beats per minute, are full of energy without any discomfort, which is not morbid. This situation is mostly caused by physiological sinus bradycardia, which is a normal phenomenon and will not affect their health. In addition, the heart rate of healthy adults during sleep can also be about 50-60 times per minute. Bradycardia is an important arrhythmia. Some patients usually have a slow basal heart rate, about 50-60 beats per minute, or even less than 50 beats, and usually have symptoms of dizziness, fatigue, burnout and poor spirit. Some patients' heart rate is normal at ordinary times, but they may suddenly have bradycardia, which falls below 40 beats per minute, and they may have dizziness, transient blackness, fatigue, palpitation, chest tightness, shortness of breath, sometimes a sense of shock in the precordial area, and in severe cases may have syncope. Some patients come to see a doctor with symptoms of dizziness, fatigue and syncope. During the examination, they can find that the heart has stopped for a long time. The most common causes of bradycardia are pathological sinus bradycardia, sinus arrest, sinus block and atrioventricular block. Pathological sinus bradycardia is characterized by slow heartbeat and discomfort. Most of the causes are sick sinus syndrome, acute myocardial infarction, hypothyroidism, increased intracranial pressure or the use of drugs that can slow down the heart rate (such as betaloc, verapamil, digitalis, reserpine, etc.). ). Sinus arrest, sinus atrial block and atrioventricular block are characterized by long-term cardiac arrest. The causes of this situation are sick sinus syndrome, degenerative changes of conduction system, congenital atrioventricular conduction tissue, myocarditis, myocardial infarction and so on. It is very dangerous to stop for more than 3 seconds, which will cause malignant ventricular arrhythmia and lead to sudden death. Patients with symptomatic bradycardia, especially those who affect their quality of life, or have cardiac arrest for more than 3 seconds, or are accompanied by transient blackness and syncope, should be actively treated. In the case of tachycardia, atropine and isoproterenol can be used to increase the heart rate in addition to treating the main cause and stopping drugs that may reduce the heart rate. For patients whose heart rate is 40 beats per minute or slower, the effect of drugs on improving heart rate is not obvious, especially for patients with repeated syncope or aura of syncope, temporary pacemakers should be placed. After actively correcting the reversible primary cause and eliminating the influence of drugs, if the patient's bradycardia symptoms are irreversible, a pacemaker needs to be implanted. Pacemakers are the size of matchboxes and weigh between 25 and 50 grams. The pulse generator is buried under the skin of the upper chest, and the pacing lead is sent to the heart through venous blood vessels. Pacemaker stimulates the heart according to a certain form of artificial pulse current, which makes the heart contract effectively, thus improving the heart rate, alleviating or eliminating the symptoms of patients and saving lives. Therefore, those who often have fatigue, heart discomfort, dizziness, transient blackness or syncope should pay attention to counting their pulse when they are calm and have discomfort. If you are not a regular sports person, your heart rate is always very slow during the day, especially less than 50 beats per minute, or your pulse is obviously slow when you feel unwell, or you should pay attention to it when you stop for a long time. You should go to the cardiac arrhythmia clinic of the hospital for a detailed examination.