Study Examines Heart Rate and Health Outcomes

Research Overview

A recent study explored the relationship between resting heart rate, changes in heart rate over time, and health outcomes, particularly cardiovascular disease. Prior research indicated that a higher resting heart rate might be a significant risk factor for negative health outcomes. Additionally, findings have shown that fluctuations in heart rate are connected to health outcomes in patients with heart failure, with an increase in heart rate correlating with worse outcomes and a decrease leading to improved health.

Details of the Research

Conducted by Vazir and colleagues, the study was published in JAMA Cardiology and involved 15,680 participants from the Atherosclerosis Risk in Communities (ARIC) study, a large and diverse community-based cohort. The researchers assessed the last recorded heart rate and the changes in heart rate over a three-year period. Participants were monitored for approximately twenty-eight years to identify the occurrence of new cardiovascular events, including coronary heart disease, heart failure, and stroke.

Findings on Resting Heart Rate

The study found that individuals with a higher resting heart rate (above 66 beats per minute) faced greater all-cause mortality risks compared to those with lower heart rates (50 or 60 beats per minute). Notably, an increase of five beats per minute in heart rate was linked to a 12% higher risk of all-cause mortality and a 13% increased risk of developing heart failure. Further analysis revealed that this same increase was associated with a 9% higher likelihood of heart attacks, a 6% higher risk of stroke, a 13% increased risk of cardiovascular death, a 12% higher risk of non-cardiovascular death, and an 8% elevated risk of cancer death.

Conclusions and Implications

The study underscored a significant connection between heart rate changes and health outcomes. The authors proposed that heart rate could serve as a valuable and easily measurable biomarker for overall health. They also suggested that modifying heart rate in specific populations might represent an effective intervention strategy to reduce disease risk and enhance health outcomes.

Reference

Vazir A, Claggett B, Cheng S, Skali H, Shah A, Agulair D, Ballantyne CM, Vardeny O, Solomon SD. Association of Resting Heart Rate and Temporal Changes in Heart Rate With Outcomes in Participants of the Atherosclerosis Risk in Communities Study. JAMA Cardiol. Published online January 24, 2018.