CONTROL OF BLOOD PRESSURE Equation MAPCO PR 6. Fill in the table below (HINT how is PR altered by constricting blood vessels?) CO blood vessels constricted how will MAP change? no change increased no change 7. Suppose BP is 93 mm Hg and HR is 60 bpm. If HR increased to 150 bpm, and nothing else changed about stroke volume or vascular resistance, what would BP be?