Elucidation of Histological Features of Pericardium in Cases Clinically Presented as Constrictive Pericarditis: A Retrospective Observational Study

Introduction: Constrictive Pericarditis (CP) is an uncommon but important disease characterised by impaired diastolic ventricular filling and impaired ventricular ejection as a result of thickened, fibrosed and often calcified pericardium. Aim: To analyse histomorphological features of pericardial biopsy removed in patients with clinical and radiological features of constriction. Materials and Methods: The present study was a retrospective observational study conducted at L PS Institute of Cardiology and Cardiothoracic Vascular Surgery and Department of Pathology, GSVM Medical College, Kanpur, Uttar Pradesh, India. A total of 108 patients with CP were studied between a time period of January 2008 to June 2019. Clinical, demographic, laboratory and operative data of patients were retrieved from record section of mentioned departments and analysed. On histology the following parameter, if present, were recorded: inflammation and its type, granulation tissue, fibrosis, extracellular collagen deposition, granuloma, haemosiderin deposition, mesothelial hyperplasia, capillary proliferation, and calcification. Data was analysed using Microsoft Office Excel spread sheet. Results: Out of 108 cases, 98 cases (90.7%) had increased pericardial thickness and 10 cases (9.2%) had normal pericardial thickness, despite clinical and echocardiographic features of restriction. In majority of cases (96 cases, 88.9%), inflammation was of chronic type and only in 8 cases (7.4%), it was of acute nature. Tubercular pericarditis was the major cause in 46 cases (42.6%) followed by chronic non specific idiopathic in 39 cases (36.1%). Conclusion: The current study evaluated the histological features of CP in a semiquantitative grade manner thus helping clinician and pathologists to guide for other ancillary testing and thus guide toward accurate diagnosis. The current study evaluated the histological features of CP in a semiquantitative grade manner thus helping pathologists to guide for other ancillary testing and thus guide toward accurate diagnosis.