Bradycardia? What's going on?

If the heart rate is slow, there are normal physiological reasons, but also pathological factors: first, physiological factors are more common in the elderly or after sleeping, or athletes engaged in a lot of sports for a long time, there will be slow heart rate. Second, for pathological factors, such as patients presenting with severe cardiogenic disease, slow heart rate may also occur in cases of unstable angina pectoris, severe arrhythmia, heart failure, or valvular heart disease. Third, for endocrine diseases, slow heart rate may also occur in cases of hypothyroidism, hypoparathyroidism, and hypoadrenalism. Fourth, for severe infections throughout the body, such as sepsis, there will be slow heart rate. Fifth, in poor nutritional status, anemia and other performance, various factors caused by shock will also show slow heart rate.