Early postoperative constrictive pericarditis in China: a single-center retrospective observational study.

Background: The diagnosis, treatment, and prognosis of early postoperative constrictive pericarditis (EPCP) have not been discussed in depth. The objective of this study was to devise and propose a management strategy for EPCP.

Methods: In this study, constrictive pericarditis (CP) within 6 months after cardiac surgery was defined as EPCP, and patients were divided into two groups based on intraoperative findings: a parietal thickening group and a visceral thickening group.

Results: A total of 20 patients were included in this study, and the incidence rate of recurrent pericardiectomy was 0.32% among all patients undergoing cardiovascular surgery. EPCP after valve surgery occurred in 85.0% of patients. Pleural effusion was the most common preoperative symptom, occurring in 90% of patients. Pericardial thickening occurred in the visceral layer in seven cases and in the parietal layer in 13 cases. There were no differences in comorbidities, C-reactive protein (CRP) level, or erythrocyte sedimentation rate (ESR) between the two groups. Most patients with visceral thickening (83.3%) needed cardiopulmonary bypass (CPB) assistance during surgery and had a longer hospital stay than those with parietal thickening (52.8±21.8 34.9±13.8 days, P=0.049). Central venous pressure (CVP) was decreased in all patients after pericardiectomy (24.9±6.96 8.9±2.92 cmHO, P<0.001), and the cardiac function improved significantly in patients with parietal thickening [New York Heart Association (NYHA) grade ≥ III accounted for 28.6% of patients]. The long-term survival rate of patients with parietal thickening was 92.3% and that of patients with visceral thickening was 57.1%, and there was no significant difference between them (P=0.056).

Conclusions: Recurrent episodes of chest tightness, pleural effusion, and elevated CVP within 6 months after cardiac surgery should be considered highly suggestive of EPCP. There are few points of difference between pericarditis with thickening of the parietal and visceral layers. After failure of conservative medical treatment, pericardiectomy results in significant improvements in cardiac function and quality of life, especially in patients with thickening of the parietal layer.