Type A personality

Type A personality is a term used to describe people who are driven, hard-working, busy, and impatient. It was first described as an important risk factor in coronary disease in the 1950's by cardiologist Meyer Friedman and his coworkers. Friedman characterizes Type A behaviour as "time urgency (or hurry sickness) and an easily-aroused irritability or anger ... or free-floating hostility". It is estimated that Type-A behavior doubles the risk of coronary heart disease in otherwise healthy men.

Reference

• Friedman M: Type A Behavior: Its Diagnosis and Treatment. New York, Plenum Press (Kluwer Academic Press), 1996.
• Type A Behavior: The Poorly Recognized and Rarely Treated Major Coronary Risk Factor by Dr. Meyer Friedman
• http://www.wilderdom.com/personality/L6–1PersonalityTypes.html#TypeA