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Sad, glad, or mad hearts? Epidemiological evidence for a causal relationship between mood disorders and coronary
1College of Health Professions, Towson University, MD 21252, USA. barrick@towson.edu
Insights
Mood disorders, including depression, are linked to coronary artery disease (CAD) risk. While not definitively causative, evidence suggests mood disorders are toxic risk factors for CAD, warranting clinical assessment.
Area of Science:
- Cardiology
- Psychiatry
- Epidemiology
Background:
- Mood disorders are increasingly recognized for their potential impact on physical health.
- Coronary artery disease (CAD) is a leading cause of mortality worldwide.
- The relationship between psychological factors and cardiovascular health is a growing area of research.
Purpose of the Study:
- To evaluate the epidemiological evidence supporting mood disorders as a risk factor in the development of coronary artery disease (CAD).
- To explore potential links between Type A behavioral pattern (TABP), anger, hostility, and mood disorders in relation to CAD.
- To ascertain clinical patterns and similarities between TABP and mood disorder symptomatology.
Main Methods:
- A comprehensive review of existing epidemiological research on mood disorders and CAD.
- Analysis of studies focusing on Type A behavioral pattern (TABP), anger, and hostility in relation to CAD.
- Application of established epidemiological criteria to assess the causality of the mood disorder-CAD association.
Main Results:
- Similarities in symptoms and behaviors were observed between Type A individuals and those with manic, cyclothymic, and hyperthymic disorders.
- Substantial epidemiological evidence indicates that mood disorders confer risk for CAD.
- Depressive symptoms and general mood disorders were identified as significant toxic risk factors for CAD.
Conclusions:
- Mood disorders are supported by epidemiological evidence as a risk factor, though not yet proven causative, for CAD.
- Clinical assessment for mood disorders is crucial for patients' cardiac health.
- Further research is warranted to elucidate the pathophysiological pathways, potentially involving catecholamines and cortisol, linking mood disorders and CAD.
Objective:
To examine the epidemiological evidence to determine if there is sufficient support for the hypothesis that mood disorders convey a risk factor in the pathogenesis of coronary artery disease (CAD).
Method:
Based on a review of the related research on Type A behavioral pattern (TABP) and other variables such as anger and hostility and their relationship to coronary artery disease (CAD), the findings were analyzed to ascertain any clinical patterns or similarities between behaviors of Type A and those in mood disorders. Using the given epidemiological criteria for a causal relationship, the association between the mood and coronary artery disease was explored.
Results:
There are similar symptoms and behaviors noted among Type A, manic, cyclothymic and hyperthymic individuals. There is sufficient historical and contemporaneous epidemiological evidence to support the notion that mood disorders confer risk for CAD, but it is premature to describe it as a causative factor. Depressive symptoms and general mood disorders emerged as toxic risk factors for CAD.
Limitation:
This article presents only a selective literature review, and it is limited by an epidemiological analyses of secondary sources. The impact of this limitation on the interpretation of the analyses is discussed.
Clinical Relevance:
Patients require scrupulous clinical assessment for the presence of mood disorders including subtype; the stakes are high, since their cardiac health status may depend upon it. Pathophysiological pathways may play a covariate role in both mood and coronary disease, and some tentative hypotheses regarding the role of catchecholamines and cortisol are explored.
Conclusions:
There is evidence to justify studying the role of mood as a covariate risk factor in the pathogenesis of CAD. Implications for mental health, public health, primary care practice, and psychometric measurement are discussed. The hypothesis that mood disorders are a cause of CAD requires further research.