Sinus bradycardia

Cause pathogenesis of sinus rhythm per minute slower than the 60 known as sinus bradycardia (Annular brady-ca rdia). Common in healthy adults, especially athletes, the elderly and sleep, the other causes of increased intracranial pressure, high potassium, hypothyroidism, low temperature, and the application of digitalis, beta-blockers, reserpine, guanethidine, - dopa and other drugs. In organic heart disease, sinus bradycardia seen in coronary heart disease, Acute myocardial infarction (especially under the wall of early myocardial infarction), myocarditis, myocardial disease, and sick sinus syndrome. ECG diagnosis of sinus rhythm, heart rate less than 60 times per minute, accompanied sinus arrhythmia. Treatment such as heart rate not less than 50 per minute, is not usually cause symptoms without treatment. If the heart rate less than 40 times per minute with angina, cardiac insufficiency or central nervous system dysfunction, can be used atropine, containing ephedrine or isoproterenol services to increase the heart rate.