Negative illness perceptions are associated with new-onset depression following myocardial infarction

Area of Science:

• Cardiology
• Psychiatry
• Health Psychology

Background:

• Myocardial infarction (MI) is a significant cardiovascular event.
• Depression following MI is common and associated with poorer outcomes.
• Understanding factors that predict post-MI depression is crucial for patient care.

Purpose of the Study:

• To investigate the association between patients' perceptions of heart disease at the time of myocardial infarction (MI) and the subsequent development of depression.
• To test the hypothesis that negative illness perceptions predict new depressive episodes after MI.

Main Methods:

• A cohort of 269 first-time MI patients was recruited and followed for 12 months.
• Baseline data included demographics, cardiac history, MI severity, and illness perceptions (using the Illness Perceptions Questionnaire - IPQ).
• Depression was assessed at baseline, 6, and 12 months post-MI using a validated questionnaire.

Main Results:

• Patients who later developed depression were more likely to perceive their heart disease as long-lasting and incurable shortly after MI.
• Illness perception scores remained significantly associated with subsequent depression after controlling for confounders.
• Specific negative perceptions, such as believing heart disease would last a long time (OR=2.7) or could not be cured (OR=0.45), showed the strongest associations.

Conclusions:

• Negative perceptions regarding heart disease, held in the acute phase following a first MI, are associated with the onset of new depressive episodes.
• These findings highlight the importance of assessing and addressing patients' illness beliefs post-MI to potentially mitigate depression risk.