A 60-year-old man is brought to the ER due to shortenss of breath after an exertional exercise. He has no associated cough or wheezing. he has a history of hypertension and diabetes mellitus and takes his medication regularly. His father died due to myocardial infarction. ECG, chest x-ray, exercise stress test, and echocardiogram are obtained to evaluate his symptoms. He subsequently undergoes right and left cardiac catheterization, and the results are as follows: Arteial blood oxygen content 20 mL O₂/ 100 mL blood
Pulmonary artery diastolic pressure 12 mmHg
Left ventricular diastolic pressure 10 mmHg
Mean right arterial pressure 4 mmHg
Venous blood oxygen content 15 mL O₂/ 100 mL blood
What additional information is necessary to calculate cardiac output in this patient?

Question

Quizplus · Accepted Answer

Eductional Objective: The Fick principle can be applied to calculate cardiac output using the rate of oxygen consumption and the arteriovenous oxygen content difference: Cardiac output = rate of O₂ consumption / arteriovenous O₂ content difference

A 60-Year-Old Man Is Brought to the ER Due to Shortenss