Effets médiateurs de la symptomatologie de stress post-traumatique et des symptômes de dissociation somatoforme sur la relation entre l’attachement et la qualité de vie liée à la santé après un infarctus du myocarde

Abstract

Myocardial infarction (MI) is a particularly frequent coronary disease: the number of new cases of MI recorded each year amounts to nearly 90,000 in France and nearly 790,000 in the United States. Over the past 15 years, the number of people who can survive this major cardiac event has substantially increased, as a result of advances in medical treatment and a reduction in delay to intervention. However, patients often report a decrease in their health-related quality of life following myocardial infarction. In other words, some patients perceive that the disease negatively affects various aspects of their daily lives, including physical functioning, emotional state, social relationships, and overall well-being. Furthermore, studies have shown that health-related quality of life is a prognostic indicator of the evolution of patients’ health status: the more health-related quality of life is reduced, the greater the risk of all-cause mortality, recurrence of cardiovascular events, and re-hospitalization for heart disease. In view of these elements, the identification of potentially modifiable factors, and in particular psychological factors, having an impact on health-related quality of life is particularly relevant. More specifically, insecure attachment, post-traumatic stress symptomatology and somatoform dissociation symptoms could have an impact on the health related-quality of life of people who have experienced a major cardiac event.

Objectives

The objective of this study was to investigate the mediating role of posttraumatic stress symptoms and somatoform dissociative symptomatology in the relationship between insecure attachment and health related-quality of life after a myocardial infarction.

Materials and methods

A total of 73 participants, having suffered a myocardial infarction and participating in a cardiovascular rehabilitation program, completed questionnaires to assess the degree of insecurity of their attachment (Experiences in Close Relationship Scale-12; ECR-12), the severity of post-traumatic stress symptoms (Post-Traumatic Stress Disorder Checklist Scale; PCL-5) and somatoform dissociation symptoms (Somatoform Dissociation Questionnaire; SDQ-20), and their health related-quality of life (MacNew Heart Disease-Health Related Quality of Life; MacNew). Mediation analyses were conducted according to the recommendations formulated by Baron and Kenny.

Results

Our results showed that only anxious attachment was positively and significantly associated with the severity of posttraumatic stress symptomatology, whereas such a link was not observed for avoidant attachment. The importance of posttraumatic symptomatology fully explained why individuals with high levels of fear of abandonment also have the poorest emotional, physical, and social quality of life after myocardial infarction. The importance of dissociative somatoform symptomatology partially explained why individuals with an insecure attachment style characterized by a high level of abandonmen were also those with the poorest health-related quality of life following myocardial infarction.

Conclusions

The results of this study tend to demonstrate the importance of taking into account the specificities of attachment, posttraumatic stress symptoms and somatoform dissociation phenomena in the context of interventions aimed at improving the health related-quality of life of people after a myocardial infarction. Insofar as secure attachment appears to be a protective factor against the risk of developing posttraumatic stress disorder, a psychotherapeutic approach aimed at promoting this form of attachment seems to be well justified. Specifically, it may be helpful to provide patients with a psychotherapeutic framework that takes into account their attachment experiences to allow them to change their beliefs about themselves and others, while helping them develop coping strategies appropriate to the stress. Psychotherapeutic interventions aimed jointly at increasing of the degree of attachment security and reducing the symptoms of posttraumatic stress and somatoform dissociation could be relevant to improve the health-related quality of life after a myocardial infarction.