Rate-pressure product = Heart rate * Systolic pressure
Rate-pressure product is a good estimate of myocardial oxygen demand. RPP = Heart Rate X Systolic Blood Pressure. When using the RPP with patients with Coronary Artery Disease and with angina symptoms, it can indicate the oxygen demand at which Angina initially occurs (angina threshold).
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So you can regulate the amount of products produced. The negative feedback mechanism is where a product, or a product of a multi-step reaction, inhibits an enzyme or catalyst in an earlier step of the reaction to keep the concentration of product from exceeding maximal values.
Rate-pressure product is also known as double product, which is the result of multiplying heart rate by systolic blood pressure. It is often used as an indicator of myocardial oxygen demand.
Rate pressure product indicates the amount of stress being placed on the heart muscle. The measure is taken by multiplying the heart rate with the systolic blood pressure.
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In a closed system, the product of pressure and volume remains constant. This is known as Boyle's Law, which states that as pressure increases, volume decreases, and vice versa.
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Factors
Rate pressure product is typically expressed in units of mmHg/min, as it is calculated by multiplying heart rate (beats per minute) by systolic blood pressure (mmHg).