Problem 1: Cardiac Output Calculation

Given: Heart rate = 80 bpm; Stroke volume = 75 mL Find: Cardiac output in L/min

Solution: CO = SV × HR CO = 75 mL/beat × 80 beats/min CO = 6000 mL/min CO = 6.0 L/min

NEET note: Normal resting CO ≈ 5 L/min (70 mL × 72 bpm). This person $\frac{6.0 L}{min}$ has slightly elevated CO — within physiological range, possibly mild exercise or mild anxiety.