The pericardium is the protective sac surrounding the heart and the roots of the great vessels. Understanding its layers and connections explains how it protects the heart while allowing it to move with minimal friction.
The pericardium, also called the pericardial sac, is a tough fibroelastic structure that surrounds the heart from nearly all sides. It also surrounds the roots of the great vessels, where those vessels connect with the heart. The sac is open at the cardiac root, and at its lower aspect the serous pericardium covers the upper surface of the diaphragm’s central tendon.
All flashcards
What is the pericardium?
It is a fibroelastic sac surrounding the heart and the roots of the great vessels. It helps protect and anchor the heart while permitting low-friction movement.
What are the two layers of the serous pericardium?
The parietal layer lines the inside of the fibrous pericardium, while the visceral layer covers the heart and is also called the epicardium.
What is the pericardial cavity?
It is the potential space between the parietal and visceral serous pericardial layers. It normally contains a small amount of lubricating serous fluid.
What are the main properties of the fibrous pericardium?
It is the strong, outer connective-tissue layer. It is relatively non-pliable, helping protect the heart and limit excessive expansion.
Name three functions of the pericardium.
It anchors the heart in the mediastinum, protects it from injury and infection, reduces friction during movement, and helps prevent excessive dilation.
Quiz questions
In pericarditis, what causes a pericardial friction rub?Answer: Inflamed pericardial surfaces rubbing against each other.
What change can lead to constrictive pericarditis after persistent inflammation?Answer: Scarring that stiffens the pericardium and restricts heart movement.
How can cardiac tamponade interfere with normal heart function?Answer: Pressure from pericardial fluid restricts ventricular filling during diastole.
What is the purpose of pericardiocentesis?Answer: To remove pericardial fluid using a needle and syringe.
What is done during a pericardial window procedure for recurrent effusions?Answer: An opening is created between the pericardial and pleural spaces.
Based on the Wikipedia article Pericardium, licensed CC BY-SA 4.0. Adapted into a summary, flashcards and quizzes.