In myocardial ischemia, it is possible to induce a rapid heartbeat, when the myocardial ischemia is often more severe and can affect the effective ejection of blood from the heart. However, a small percentage of patients also experience bradycardia and may even develop high atrioventricular block. First, when myocardial ischemia leads to a decrease in blood transfusion, the body will compensate by making the heartbeat faster to maintain effective blood ejection and ensure perfusion of important organs, such as brain perfusion and kidney perfusion, which is a regulatory response of the body. Secondly, myocardial ischemia produces more severe chest pain, and the patient may also induce sympathetic excitation due to pain stimulation, which causes increased heart rate as well as increased blood pressure and premature heartbeat. Again, the patient may also experience emotional stress or anxiety, which activates the sympathetic nerves and induces an increase in heart rate, which is a normal physiological response of the body. In addition, myocardial ischemia may also induce cardiac insufficiency and acute heart failure, and when heart failure occurs, it may also be combined with an increased heart rate. When myocardial ischemia occurs in the right coronary artery, it can affect the blood supply of the right coronary to the sinus node or atrioventricular node, thus affecting the conduction function of cardiomyocytes and slowing down the heart rate, or even slowing down various arrhythmias, so there may also be a slow heart rate.