Beijing: A higher resting heart rate may increase the risk of death, even in people without the usual risk factors for heart disease, a study reveals.
A normal resting heart rate for adults ranges from 60 to 100 beats a minute. Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness.
"The association of resting heart rate with risk of all-cause and cardiovascular mortality is independent of traditional risk factors of cardiovascular disease, suggesting that resting heart rate is a predictor of mortality in the general population," said lead author Dongfeng Zhang from Qingdao University medical college, Shandong, China.
The researchers found that people with a resting heart rate of more than 80 beats/minute had a 45 percent higher risk of death from any cause than those with a resting heart rate of 60-80 beats/minute.
The team assessed 46 studies involving 1,246,203 patients and 78,349 deaths from all causes, and 848,320 patients and 25,800 deaths from heart disease.
"Results from this meta-analysis suggest the risk of all-cause and cardiovascular mortality increased by nine percent for every 10 beats/minute increment of resting heart rate," Zhang said.
"The risk of all-cause mortality increased significantly with increasing resting heart rate, but a significantly increased risk of cardiovascular mortality was observed at 90 beats/minute," the researcher added.
The findings were similar for people with cardiovascular risk factors.
The study was published in the Canadian Medical Association Journal.
A normal resting heart rate for adults ranges from 60 to 100 beats a minute. Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness.
"The association of resting heart rate with risk of all-cause and cardiovascular mortality is independent of traditional risk factors of cardiovascular disease, suggesting that resting heart rate is a predictor of mortality in the general population," said lead author Dongfeng Zhang from Qingdao University medical college, Shandong, China.
The team assessed 46 studies involving 1,246,203 patients and 78,349 deaths from all causes, and 848,320 patients and 25,800 deaths from heart disease.
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"The risk of all-cause mortality increased significantly with increasing resting heart rate, but a significantly increased risk of cardiovascular mortality was observed at 90 beats/minute," the researcher added.
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The study was published in the Canadian Medical Association Journal.
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