How many times per minute is sinus rhythm normal? Can I take part in the marathon?

1 How many times per minute is the electrocardiogram of normal sinus rhythm? Generally, the following two conditions must be met. The first is that the P wave in leads I, II and aVF is vertical and the aVR is inverted. The second P-R interval is 0. 12 ~ 0.20 seconds. There is a special small nodule on the right atrium of human body, which is composed of special cells. We all call it sinoatrial node. It can automatically and rhythmically generate electric current, which is transmitted to all parts of the heart in the order of conducting tissues, thus causing contraction and relaxation of myocardial cells. The normal heartbeat of the human body starts from here and is a pacemaker of the heart. Every time the sinus node has an impulse, the heart beats once, which is called sinus rhythm in medicine, so the normal beating of the heart should be sinus rhythm. Sinus node is the highest command of heart beating, so a normal heart must have a normal sinus node, which has strong self-discipline. Any heart rate formed by the excitation of sinoatrial node is always called sinus rhythm. The rhythm of sinoatrial node is 60- 100 beats per minute, but there are also a few young people whose heart rate is 50-60 beats per minute. Children before the age of six can exceed 100 beats per minute and infants can reach100 beats per minute.

Can sinus rhythm run a marathon? Whether sinus rhythm can run a marathon depends on the specific situation. Because sinus heart rate originated from sinus node, it is called sinus heart rate and belongs to normal heart rate. Marathon is a long-distance running event, and the distance is relatively long. Generally, the mileage increases slowly from less to more, mainly depending on personal ability. Experienced runners can run more. After a lot of long-distance training and good endurance, this kind of competition will be held, but it will also bring the risk of sports injury. For beginners who just want to finish the race, it is suggested that the training time should last at least four months, and many coaches suggest that the running mileage should not be increased by more than 10% per week. They also suggest that they should have more than six weeks of running experience before starting marathon training to adapt their bodies to the new rhythm. Therefore, people with sinus rhythm and no other physical diseases can consider running a marathon after training, but there is also the risk of sports injury.

What does sinus arrhythmia mean? Any heart rate originating from sinoatrial node is called sinus rhythm, which belongs to normal rhythm. When the origin of sinus rhythm has not changed, but the rhythm is irregular, and the P-P interval on the same lead differs by 0. 12 seconds, we call it sinus arrhythmia, which often coexists with sinus bradycardia. There are two kinds of ECG manifestations, one is respiratory sinus arrhythmia and the other is non-respiratory sinus arrhythmia. Respiratory sinus arrhythmia is first sinus P wave, which is related to breathing. It slows down when exhaling, accelerates when inhaling, and turns into regular rhythm when holding your breath. The difference between P-P intervals in the same lead is greater than 0. 12 seconds. Non-respiratory sinus arrhythmia is basically the same as respiratory sinus arrhythmia, but arrhythmia has nothing to do with respiratory cycle.

What is the meaning of sinus arrhythmia? Sinus rhythm belongs to normal heart rate, and sinus tachycardia, sinus bradycardia, sinus arrhythmia, sinus arrest and sick sinus syndrome all belong to sinus rhythm abnormality. Normal adult sinus rhythm is called sinus tachycardia when its frequency is greater than 100 beats/min, and sinus bradycardia when its frequency is less than 60 beats/min. The origin of sinus rhythm has not changed, but the rhythm is irregular. On the same lead, the difference of P-P interval is greater than 0. 12 seconds, which is called sinus arrhythmia and often coexists with sinus bradycardia. In the regular sinus rhythm, sometimes due to the increase of vagus nerve tension or the disorder of sinus node, sinus node stops emitting excitement for a period of time, which is called sinus arrest. Degenerative diseases of pacing conduction system, coronary heart disease, myocarditis, cardiomyopathy and other diseases can involve sinus node and its surrounding tissues to produce a series of slow sinus arrhythmia, and cause dizziness, amaurosis, syncope and other clinical manifestations, which is called sick sinus node syndrome.