Final answer:
The stroke volume of a patient can be calculated by dividing the cardiac output (CO) by the heart rate (HR). In this case, the patient's CO is 5.5L/min and her heart rate is 75bpm. The stroke volume would be 73.3ml.
Step-by-step explanation:
The stroke volume of a patient can be calculated by dividing the cardiac output (CO) by the heart rate (HR). In this case, the patient's CO is 5.5L/min and her heart rate is 75bpm. So, the stroke volume would be 5.5L/min ÷ 75bpm = 0.0733L/bpm. Since 1L = 1000ml, the stroke volume would be 0.0733L/bpm × 1000ml/L = 73.3ml. Therefore, the correct answer is option a) 65 ml.