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Q.What is ST Heart Rate Slope?
Correcting ST depression for heart rate, seems to be based on second physiological principles and has been proposed by a number of investigations. Elamin and associates reported that he could achieve 100 per cent sensitivity and specificity in the discrimination of CAD and could also separate with perfect accuracy one vessel, two vessel and three vessel disease. Unfortunately no one else has been able to confirm his findings. Kligfield et al have one extensive study using ST/HR slope and believe that it adds a good deal to the diagnostic accuracy. They use a slope of 2.4 micro volts/h/beat as a threshold for the presence of ischaemia (r = heart rate).
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