From the Guidelines
Angiotensin-converting enzyme (ACE) inhibitors and angiotensin II receptor blockers (ARBs) are the antihypertensive medications least likely to affect heart rate. These medications work by blocking the renin-angiotensin-aldosterone system, which primarily affects blood vessel tone rather than cardiac output or heart rate 1. Common ACE inhibitors include lisinopril, enalapril, and ramipril, while common ARBs include losartan, valsartan, and olmesartan. Typical starting doses are lisinopril 10mg daily or losartan 50mg daily, which can be titrated up as needed for blood pressure control.
These medications effectively lower blood pressure by causing vasodilation and reducing peripheral resistance without directly affecting the sinoatrial node or cardiac conduction system. This makes them particularly useful in patients with bradycardia, tachycardia, or certain arrhythmias where maintaining the current heart rate is desirable. In contrast, beta-blockers and certain calcium channel blockers can significantly reduce heart rate as part of their mechanism of action. Diuretics and direct vasodilators also have minimal direct effects on heart rate, though they may cause reflex tachycardia in some patients.
Some key points to consider when choosing an antihypertensive medication include:
- The ability of the medication to lower blood pressure without affecting heart rate
- The presence of comorbid conditions, such as heart failure or diabetes
- The potential for adverse effects, such as weight gain or dyslipidemia
- The need for combination therapy to achieve adequate blood pressure control. According to the European guidelines on cardiovascular disease prevention in clinical practice, ACE inhibitors and ARBs are suitable for initiation and maintenance of antihypertensive treatment, either as monotherapy or in combination 2, 3.
From the FDA Drug Label
In hemodynamic studies of lisinopril in patients with essential hypertension, blood pressure reduction was accompanied by a reduction in peripheral arterial resistance with little or no change in cardiac output and in heart rate.
The antihypertensive least likely to affect heart rate is lisinopril.
- It has been shown to reduce blood pressure with little or no change in heart rate.
- This effect is due to its mechanism of action, which involves reducing peripheral arterial resistance without significantly affecting cardiac output or heart rate 4.
From the Research
Antihypertensive Medications and Heart Rate
- The antihypertensive medication least likely to affect heart rate is an ACE inhibitor, such as lisinopril 5, 6, 7.
- Studies have shown that lisinopril does not significantly alter heart rate 5, 7.
- In comparison, diuretics may increase heart rate, especially when combined with beta-blockers 6.
- The ALLHAT trial found that lisinopril had a similar effect on heart rate as chlorthalidone, a diuretic, but with a slightly lower systolic blood pressure reduction 8.
- Another study found that the addition of an ACE inhibitor to a beta-blocker did not significantly affect heart rate, whereas the addition of a diuretic increased heart rate 6.
Comparison of Antihypertensive Medications
- ACE inhibitors, such as lisinopril, have been compared to diuretics, such as hydrochlorothiazide, in several studies 8, 6, 7, 9.
- The results of these studies suggest that ACE inhibitors may be a good option for patients who require antihypertensive medication with minimal effects on heart rate 5, 6, 7.
- However, the choice of antihypertensive medication should be individualized based on patient characteristics and medical history 8, 9.