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Heart Watch Blog: High Diastolic Blood Pressure May Protect You During Exercise

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Dec 11, 2005

High Diastolic Blood Pressure May Protect You During Exercise

High Diastolic Blood Pressure May Protect You During Exercise
Having a high diastolic blood pressure during exercise appears to have a protective effect against exercise-induced myocardial ischemia. This has been reported in a recent issue of the American Heart Journal. Most coronary perfusion to the left ventricle arises during diastole because the vessels are compressed during systole. So, a high diastolic blood pressure during exercise would be assumed to have a protective effect on exercise-induced ischemia. Conversely, a high systolic pressure would be expected to worsen ischemia

Dr. Hiroyuki Yamagishi, from Osaka City University Graduate School of Medicine in Japan, and colleagues scrutinized data from 469 patients with suspected coronary artery disease and had undergone heart-imaging studies during exercise. A diastolic blood pressure of at least 90 mmHg at peak exercise was considered high.

Approximately half of the patients had normal diastolic blood pressures during exercise and half had high pressures. There were no significant differences in number of diseased vessels, the severity of atherosclerosis or medications were noted between the groups.

It was found that the patients with high diastolic blood pressure during exercise had a higher pressure-rate product than their peers with normal pressure. This suggested that ischemia was weakened patients with high diastolic blood pressure.

The authors explain that most coronary blood flow to the left ventricle of the heart occurs during diastole (dilation) because the vessels are compressed during systole. So, a high diastolic blood pressure during exercise is assumed to have a protective effect on exercise-induced ischemia.

Daniel      


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Heart disease
About 13 million Americans (about 7 percent of the total population) suffer from coronary artery disease. Coronary artery disease is the leading cause of death in American men and women amounting a staggering 20 percent of all causes of death. About half of all deaths related to cardiovascular diseases occur from coronary artery disease. Through this heart watch blog we will have our humble contribution towards making men and women aware of the risks of heart diseases.

Heart Watch Blog: High Diastolic Blood Pressure May Protect You During Exercise

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