What are the drugs that only lower heart rate but not blood pressure

The drugs that only lower heart rate but not blood pressure mainly include non dihydropyridines in beta blockers and calcium channel blockers. These drugs lower heart rate through different mechanisms, but do not significantly affect blood pressure, making them suitable for patients who need to control heart rate without affecting blood pressure.

1. Beta blockers: These drugs lower heart rate by blocking cardiac beta receptors, slowing down heart rate and myocardial contractility. Common medications include atenolol, metoprolol, and bisoprolol. Atenolol is suitable for patients with hypertension and angina, metoprolol is widely used for arrhythmia and heart failure, and bisoprolol is commonly used for chronic heart failure and hypertension.

2. Non dihydropyridine calcium channel blockers: These drugs slow down heart rate and myocardial contractility by blocking calcium channels in the heart and vascular smooth muscle, thereby reducing heart rate. Common medications include verapamil and diltiazem. Verapamil is suitable for arrhythmia and angina, while diltiazem is used for arrhythmia and hypertension.

3. Precautions for use: When using these medications, it is necessary to choose the appropriate medication and dosage according to the patient's specific situation. Beta blockers may cause fatigue and depression, while non dihydropyridine calcium channel blockers may lead to constipation and hypotension. Regularly monitor heart rate and blood pressure to ensure medication efficacy and safety.

Drugs that only lower heart rate but not blood pressure have important clinical significance, as they can effectively control heart rate without affecting blood pressure and are suitable for specific patient populations. Choosing appropriate medication and dosage, regularly monitoring heart rate and blood pressure, are key to ensuring treatment effectiveness and safety.