Estimate myocardial oxygen demand from HR and SBP.
RPP = HR × SBP. Also called the double product. Normal resting RPP: ~6,000–12,000. Peak exercise RPP can reach 25,000–40,000. Angina typically occurs at a reproducible RPP threshold. RPP correlates closely with myocardial oxygen consumption and is used in exercise stress testing to assess cardiac workload.