New postoperative depressive symptoms and long-term cardiac outcomes after coronary artery bypass surgery

Area of Science:

• Cardiology
• Psychiatry
• Health Outcomes Research

Background:

• Coronary artery bypass graft (CABG) surgery is a common intervention for cardiovascular disease.
• Postoperative depression can impact patient recovery and long-term health.
• The relationship between transient depressive symptoms and cardiac outcomes requires further investigation.

Purpose of the Study:

• To evaluate the impact of increased depressive symptoms at 6 months post-CABG surgery on cardiac morbidity and mortality.
• To determine if a 6-month postoperative increase in depression predicts adverse cardiac events between 6 and 36 months.

Main Methods:

• Prospective cohort study involving patients undergoing elective CABG surgery.
• Assessment of depressive symptoms at baseline and 6 months postoperatively.
• Follow-up at 36 months to record cardiac and neurologic morbidity and mortality.

Main Results:

• A total of 123 out of 124 patients (99%) completed the 36-month follow-up.
• The rate of cardiac morbidity/mortality between 6 and 36 months was 13.6% for patients with newly increased depressive symptoms at 6 months, versus 3.0% for those without.
• An increase in depressive symptoms at 6 months was the sole predictor of subsequent cardiac complications.

Conclusions:

• Increased depressive symptoms 6 months after CABG surgery are associated with a higher risk of major cardiac morbidity and mortality up to 36 months postoperatively.
• Early identification and management of postoperative depression may be important for improving long-term cardiac outcomes in CABG patients.