Q. Explain Rate Pressure Product?
The systolic blood pressure is multiplied by the heart rate to provide the double product or modified fusion time index. On presence of an obstructed coronary artery it takes a longer time to reach the same pressure pulse value than it would take in a heart with normal coronary arteries.
Because the double product depends on both the SBP and the heart rate, the findings that they appear to be related variables is of some interest.