Final answer:
The Rate Pressure Product, often called the double product, is a true measure used to estimate the myocardium's oxygen demand, calculated by multiplying the heart rate by systolic blood pressure.
Step-by-step explanation:
The Rate Pressure Product (RPP), also known as the double product, is a measure used to estimate the oxygen demand of the myocardium (heart muscle). It is calculated by multiplying the heart rate by the systolic blood pressure. The idea behind this measurement is that heart rate and systolic blood pressure are both determinants of myocardial work, and thereby oxygen demand, since the heart requires more oxygen when it beats faster and against a higher pressure.
The question asks whether the Rate Pressure Product can be used to estimate myocardial O₂ demand, and the answer is true. The Rate Pressure Product is a clinically relevant indicator that can help understand the stress on the heart during various activities or medical conditions.