Whether or not sudden death occurs with a heart rate of 105 beats per minute depends largely on the presence of organic heart disease. If a more serious organic cardiac disease is present, there may be a risk of sudden death regardless of the heart rate. Only arrhythmias in a pathological state may lead to the possibility of sudden death. It is necessary to go to the cardiovascular department of the hospital to do the relevant examination, to clarify whether there is organic heart disease, need to check the chest X-ray, electrocardiogram, cardiac ultrasound, cardiac enzyme spectrum and other test programs, can rule out the existence of organic heart disease. If such diseases are ruled out, a heart rate of 105 beats per minute will not lead to sudden death, and such a heart rate may be caused by the self-regulation of the heart.