Ask the doctor. Q. Your article about interval training in the September issue suggests a target heart rate of at least 80% of your maximum heart rate during the high-intensity intervals.
How Beta Blockers Lower Blood Pressure. Beta blockers work by blocking the effect of epinephrine (adrenaline) on the tissues—specifically, by blocking the “beta receptors” that bind epinephrine. Among other things, blocking the beta receptors slows the heart rate, reduces the force of contraction of the heart muscle, reduces the amount of oxygen the heart muscle needs to do its work, reduces stress on the vascular system, and tends to lower the blood pressure. 1 .
Background: Exercise is recommended for cardiac patients irrespective of beta-blockers. Percentages of maximal heart rate (%HRmax) and heart rate reserve (%HRR) are widely used to determine training intensities. The purpose of this study was to investigate the influence of chronic cardioselective beta blockade on the %HRmax and %HRR model.
Patients with a heart rate of 58-64 b.p.m. at visit 2 had the best prognosis. Conclusions: The use of beta-blockers and resting heart rate at visit 2 both independently indicated prognosis, but beta-blocker dose did not. Beta-blockers may reduce mortality by several mechanisms; one that may be specific to blockade of adrenergic receptors and another related to heart rate reduction. Achieving a target heart rate range may be an appropriate therapeutic goal for patients with CHF.
Beta blockers slow your heart rate, which can prevent the increase in heart rate that typically occurs with exercise. This means that it might not be possible for you to reach your target heart rate — the number of heartbeats per minute you aim for to ensure you're exercising hard enough.
If you are 70 years old, for instance, your adjusted target heart rate would be (220 - 70) 0.8 = 120 beats per minute. For people on a beta blocker, one suggestion is to adjust your target heart rate by the same amount that the beta blocker has reduced your resting heart rate (usually around 10 beats per minute).
for someone taking 50 mg of beta blocker toprol (metoprolol) daily, is a resting heart rate of 52 to be concerned about? Dr. Dean Giannone answered. 25 years experience Internal Medicine.
A beta blocker prevents one from reaching a maximum heart rate. I have been on coreg (beta blocker) and anyone who is on a physical exercise program knows the heart rate cannot be reached when on beta blockers. The best medicine for high blood pressure is an ACE inhibitor (mine is lisinopril for more than 7 years).