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[Is resting heart rate a cardiovascular risk factor?]
S Cook1, E Delacrétaz, O M Hess
1Swiss Cardiovascular Center, Bern.
Praxis
|July 3, 2008
Summary
Resting heart rate is now recognized as a significant predictor of cardiac events, including sudden cardiac death and heart failure. Elevated resting heart rate also indicates increased risk for all-cause mortality in both general and cardiac patient populations.
Area of Science:
- Cardiology
- Preventive Medicine
Background:
- Resting heart rate (RHR) was historically underestimated as a cardiovascular risk factor.
- Emerging evidence highlights RHR's prognostic significance.
Purpose of the Study:
- To evaluate the role of resting heart rate as a predictor of mortality and cardiac events.
- To understand the pathophysiological basis linking RHR to adverse cardiovascular outcomes.
Main Methods:
- Review of recent epidemiological and clinical evidence.
- Analysis of pathophysiological mechanisms connecting heart rate to cardiac function.
Main Results:
- Resting heart rate is a significant prognostic factor for sudden cardiac death and heart failure.
- Elevated RHR predicts both cardiac and all-cause mortality.
- Increased RHR elevates myocardial oxygen demand and reduces diastolic coronary blood flow.
Conclusions:
- Resting heart rate is a crucial, independent prognostic marker in cardiovascular medicine.
- Understanding RHR's impact is vital for risk stratification and patient management.
- Pathophysiological mechanisms involving myocardial oxygen supply-demand balance explain RHR's predictive power.
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