Type A behavior pattern in a German sample of post-infarction patients below age 40.

While Type A is predominant in 62 coronary subjects below age 40, its specificity is to be questioned because for controls the A:B ratio is very similar. Cases display significantly more hostility and loud/explosive speech than controls. During the interview, cases belonging to different Type A categories did not differ in heart rate, skin resistance responses and blood pressure, when task values are used. Furthermore, no differences between coronary A and B subjects are found on cardiological findings, inclusive severity of coronary atherosclerosis.