What meaning is sinus sex bradycardia? Sinus rhythm slower than 60 beats per minute is called sinus bradycardia. It can be seen in healthy adults, especially athletes, the elderly, and during sleep.According to BORSAM Biomedical,Other causes include increased intracranial pressure, hyperkalemia, hypothyroidism, hypothermia, and the use of digitalis, beta blockers, reserpine, guanidine, and methyldopa. Sinus bradycardia is seen in organic heart disease.




　　The etiology of sinus bradycardia

　　1. Internal factors

　　(1) most of the excitations of the vagus nerve occur through the nerves (mainly vagus nerve excitations) and the humoral mechanism through the external cardiac nerves, or directly affect the sinus atrial node and cause sinus bradycardia.

　　(2) impaired sinus node function refers to sinus bradycardia caused by damaged sinus node (such as inflammation, ischemia, poisoning or degenerative changes). According to bo sound medical treatment understands, in addition, visible at myocardial damage if myocarditis, pericarditis, myocardial sclerosis. According to BORSAM Biomedical,It may also be caused by transient sinus node inflammation, ischemia and toxic damage.

　　(3) the incidence of sinus bradycardia in acute myocardial infarction is 20% ~ 40%, with the highest incidence in the early stage of acute myocardial infarction (especially inferior wall infarction).

　　2. External factors

　　The sinus sex that the element outside the heart is caused by is bradycardia, vast majority companion has the phenomenon of hyperactivity of vagus nerve, it is nerve sex, heart rate is not very stable. According to bo sheng medical treatment, when autonomic nervous tone changes, such as deep breathing, exercise, atropine injection often after the change in heart rate, p-r interval can be slightly extended.