Heart rate lowering drugs include the following major categories: first, beta-blockers. beta-blockers are indicated for various types of arrhythmias, including sinus tachycardia, supraventricular arrhythmias, and ventricular arrhythmias. These drugs are divided into oral and intravenous preparations, intravenous preparations are usually used in short-acting preparations, such as esmolol, oral preparations include betalactam, fumaric acid, bisoprolol, etc. Beta-blockers not only have the effect of lowering the heart rate, but also the effect of lowering blood pressure. Therefore, when using such drugs, it is necessary not only to observe the heart rate, but also to monitor the changes in blood pressure. The second type of calcium antagonists, including non-dihydropyridine calcium antagonists, such as verapamil and diltiazem, can lower the heart rhythm and are used for various supraventricular arrhythmias. The third category, F-channel blockers, is commonly used clinically as ivabradine. The fourth category, digitalis-like preparations, including oral and intravenous preparations, the oral preparation is digoxin, and the representative drug of intravenous preparation is cetiran.