Excessive increase in heart rate before exercise doubles risk of sudden cardiac death in later life

French researchers have discovered a simple and cheap method of predicting who is at greater risk of dying suddenly and unexpectedly from a heart attack.

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<p><a href="http://www.physorg.com/news160212716.html">Excessive increase in heart rate before exercise doubles risk of sudden cardiac death in later life</a></p> <p>French researchers have discovered a simple and cheap method of predicting who is at greater risk of dying suddenly and unexpectedly from a heart attack.</p>