Heart rate: a forgotten link in coronary artery disease?

Area of Science:

• Cardiology
• Clinical Medicine
• Pharmacology

Background:

• Elevated resting heart rate (RHR) is an independent, modifiable risk factor for cardiovascular events and mortality in patients with coronary artery disease (CAD).
• High RHR adversely affects myocardial oxygen supply/demand balance, arterial wall integrity, and cardiac electrophysiology.
• The pathophysiological mechanisms linking elevated RHR to adverse cardiovascular outcomes require further elucidation.

Purpose of the Study:

• To highlight the independent risk posed by elevated resting heart rate in coronary artery disease.
• To discuss the pathophysiological consequences of elevated heart rate on the cardiovascular system.
• To emphasize the therapeutic potential of heart rate control in managing coronary artery disease.

Main Methods:

• Review of existing evidence on the role of elevated heart rate in cardiovascular disease.
• Discussion of the pathophysiological effects of increased heart rate on myocardial oxygen consumption, arterial function, and arrhythmia risk.
• Consideration of pharmacological interventions, such as ivabradine and beta-blockers, for heart rate management.

Main Results:

• Elevated heart rate increases myocardial oxygen demand while reducing perfusion time, leading to ischemia.
• High heart rate accelerates the deterioration of arterial wall components, particularly elastin fibers.
• Increased heart rate can promote arrhythmias and exacerbate coronary atherosclerosis.

Conclusions:

• Elevated resting heart rate is a critical, modifiable risk factor in coronary artery disease patients.
• Understanding the specific effects of heart rate reduction therapies like ivabradine compared to beta-blockers is crucial.
• Effective heart rate control is an underutilized therapeutic strategy in clinical practice for patients with CAD.