Changes in Coronary Blood Flow and Other Hemodynamic Indicators Induced by Stressful Interviews

&NA; Thirty male subjects, aged 29–69, were studied before and during stressful interviews. Coronary blood flow was measured using the radioactive Diodrast technique developed by Sevelius and Johnson. Blood pressure and pulse rate were also measured; cardiac output and peripheral resistance were calculated. Significant alterations in these parameters occurred in a patterned way which corresponded to judgments of the patients' feeling states.