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[Stress and the cardiovascular system]
1Unité Médico-Psychologique, Hôpital Broussais, Paris.
Insights
Stress significantly elevates blood pressure and worsens cardiovascular disease, particularly coronary heart disease. Type A behavior, characterized by impatience and drive, increases heart attack risk, independent of other factors.
Area of Science:
- Cardiology
- Psychophysiology
- Behavioral Medicine
Context:
- Stress is a known contributor to sustained hypertension and cardiovascular pathology, especially coronary heart disease.
- Experimentally, stress can induce pathogenic changes in hemodynamics, lipid metabolism, and hemostasis.
- Individuals with high blood pressure, vascular heredity, and a tendency towards inhibited action exhibit heightened stress reactivity.
Purpose:
- To explore the link between psychological characteristics and coronary heart disease risk.
- To investigate the role of Type A behavior and locus of control in stress response and cardiovascular outcomes.
- To analyze the predictive validity of Type A behavior on coronary mortality.
Summary:
- Prospective studies identify psychological traits, notably Type A behavior (hyperactivity, impatience), as increasing coronary heart disease risk.
- Type A individuals exhibit amplified neuroendocrine responses to stress and face more stressful situations.
- Type A behavior predicts myocardial infarction incidence independently of hypertension, hypercholesterolemia, or smoking.
Impact:
- Understanding the psychophysiological underpinnings of stress-related cardiovascular disease is crucial for prevention and management.
- Identifying individuals with Type A behavior can aid in targeted interventions to mitigate coronary heart disease risk.
- Further research is needed to clarify the predictive validity of Type A behavior in coronary mortality.
Abstract:
A variety of evidence shows that stress contributes to a more or less sustained elevation of blood pressure, as well as to the triggering and aggravation of cardiovascular pathology, especially coronary heart disease. Experimentally induced changes, that may be pathogenic due to their duration or repetition, can be produced in hemodynamics, lipid metabolism, or hemostasis. High blood pressure, vascular heredity, but also a trend to inhibition of action, seem to be responsible for hyperreactivity to stress. Hypertensives are particularly reactive to active stresses related to controlable situations, experienced as challenges. Several prospective studies in healthy subjects have confirmed the increased risk for coronary heart disease of certain psychological characteristics: the most known of them is Rosenman's and Friedman's type A behavior (hyperactivity, speed and impatience, hard driving, job involvement). It is known that individuals presenting such characteristics exhibit increased neuroendocrine responses to all types of stress. Pattern A predicts the incidence of myocardial infarction, independently of other coronary risk factors, such as hypertension, hypercholesterolemia, or smoking habits. It as been proved that type A individuals deal on average with more stressing conditions than type B individuals and that they set higher goals than general population. On a cognitive level, they tend to have an internal "locus of control" (they are inclined to attribute their personal successes or failures to their own responsibility). Nevertheless, the most reactive to stress among type A individuals are those whose locus of control is external. The predictive validity of pattern A in coronary mortality is more debated.(ABSTRACT TRUNCATED AT 250 WORDS)