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Updated: Mar 14, 2026

An Intact Pericardium Ischemic Rodent Model
Published on: September 2, 2021
Pericardium: structure and function in health and disease
Maria Jaworska-Wilczynska1, Pawel Trzaskoma, Andrzej A Szczepankiewicz
1Department of Acquired Cardiac Defects, Institute of Cardiology, Warsaw, Poland. mjawil@gmail.com.
Insights
The normal pericardium, including mesothelial cells, protects the heart and aids healing. Dysfunction can lead to adhesions and complications in pericarditis.
Area of Science:
- Cardiovascular Biology
- Cell Biology
- Histology
Background:
- The pericardium, a sac surrounding the heart, has fibrous and serous layers.
- The serous pericardium contains mesothelial cells crucial for heart protection and function.
- Pericardial cavity holds plasma ultrafiltrate, facilitating lubrication and reducing friction.
Purpose of the Study:
- To detail the normal structure and function of the pericardium.
- To highlight the role of mesothelial cells in pericardial health and disease.
- To explain how pericardial injury and inflammation can lead to complications.
Main Methods:
- Review of normal pericardial anatomy and histology.
- Examination of mesothelial cell ultrastructure and function.
- Analysis of pericardial healing and pathological changes.
Main Results:
- Normal pericardium provides mechanical protection and lubrication.
- Mesothelial cells are vital for immune response, repair, and coagulation.
- Cuboidal mesothelial cells exhibit specialized ultrastructure for active functions.
- Impaired pericardial healing can result in adhesions, causing serious complications.
Conclusions:
- The integrity of the pericardium and its mesothelial cells is essential for cardiac health.
- Understanding pericardial structure is key to preventing complications from pericarditis.
- Dysfunctional mesothelial cells contribute to adverse outcomes in pericardial disease.
Abstract:
Normal pericardium consists of an outer sac called fibrous pericardium and an inner one called serous pericardium. The two layers of serous pericardium: visceral and parietal are separated by the pericardial cavity, which contains 20 to 60 mL of the plasma ultrafiltrate. The pericardium acts as mechanical protection for the heart and big vessels, and a lubrication to reduce friction between the heart and the surrounding structures. A very important role in all aspects of pericardial functions is played by mesothelial cells. The mesothelial cells form a monolayer lining the serosal cavity and play an important role in antigen presentation, inflammation and tissue repair, coagulation and fibrinolysis. The two major types of mesothelial cells, flat or cuboid, differ substantially in their ultrastructure and, probably, functions. The latter display abundant microvilli, RER, Golgi dense bodies, membrane-bound vesicles and intracellular vacuoles containing electron-dense material described as dense bodies. The normal structure and functions of the pericardium determine correct healing after its injury as a result of surgery or microbial infection. The unfavorable resolution of acute or chronic pericarditis leads to the formation of adhesions between pericardial leaflets which may lead to serious complications.
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