Final answer:
Margaret exhibits a Type A behavior pattern, characterized by intense drive, competitiveness, and impatience. People with Type A behavior, like the example given for Jeffrey, are at higher risk of heart disease due to their high-stress lifestyle when compared to the more relaxed Type B individuals.
Step-by-step explanation:
Margaret is very impatient, driven, and competitive. She shows a Type A behavior pattern. This pattern includes an aggressive and chronic struggle to achieve more and more in less and less time, and is characterized by an excessive competitive drive, chronic sense of time urgency, impatience, and hostility, particularly towards those who impede one's goals according to Friedman & Rosenman's research from 1974.
An example of someone with a Type A behavior pattern is Jeffrey, who is intensely driven and finds it hard to relax. He takes on extra tasks at work, becomes agitated with slower coworkers, and shows hostility when interrupted. His pattern of behavior has significantly increased his risk of heart disease, which was demonstrated by early longitudinal investigations.
The contrast between Type A individuals and Type B individuals was noted by Friedman and Rosenman, with the latter being characterized as more relaxed and laid-back. This distinction is not just of academic interest, but of practical health implications, as the Type A behavior pattern is considered a risk factor for heart disease.