Type A behaviour and pressor response in a representative sample of middle-aged men

Area of Science:

• Psychology
• Cardiology
• Behavioral Medicine

Background:

• Type A behavior pattern is a potential risk factor for heart disease.
• The physiological mechanisms linking Type A behavior to cardiovascular risk are not fully understood.
• Previous research suggests Type A behavior may be associated with heightened pressor responses to stress.

Purpose of the Study:

• To investigate the relationship between Type A behavior patterns and cardiovascular reactivity to acute stressors.
• To determine if physiological pressor response mediates the association between Type A behavior and heart disease risk.

Main Methods:

• 114 men aged 30-65 were assessed using Jenkins Activity Survey, Framingham, and Bortner Type A scales.
• Blood pressure and heart rate were measured at rest and during various stress conditions (serial reaction time, mental arithmetic, noise).
• Type A scores were analyzed for correlations with demographic factors, smoking history, and task performance.

Main Results:

• Type A scores were inversely related to age and resting systolic pressure.
• Type A scores were not significantly correlated with pressor or heart rate responses to any stress condition.
• No evidence was found supporting physiological response as an explanation for the Type A-heart disease link.

Conclusions:

• The study did not find evidence that Type A behavior is associated with a greater pressor response to stress.
• These findings suggest that physiological reactivity to stress may not be the primary mechanism explaining the link between Type A behavior and heart disease.
• Further research is needed to elucidate the complex relationship between behavioral patterns and cardiovascular health.