Measurement of Central Venous Oxygen Saturation in Patients with Myocardial Infarction
Central venous oxygen saturation (CVSO2) was measured in 31 patients with myocardial infarction. CVSO2 correlated well with the patients' clinical course. In those patients not in heart failure, mean ± sem for CVSO2 was 70 ± 1%. When heart failure was present, CVSO2 averaged 56 ± 1%. When both heart failure and shock were present, CVSO2 averaged 43 ± 1%. In nine patients, serial determinations of arterial oxygen saturation and CVSO2 were made. In 22 of 26 instances, either a fall in CVSO2 was accompanied by an increase in the arteriovenous oxygen saturation difference or an increase in CVSO2 was accompanied by a decrease in arteriovenous oxygen saturation difference. Serial measurements of CVSO2 appear to be a useful method of monitoring changes in myocardial function in patients with myocardial infarction.
- © 1968 American Heart Association, Inc.