pericardium

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Related to pericardial sac: Pleural sac

pericardium:

see heartheart,
muscular organ that pumps blood to all parts of the body. The rhythmic beating of the heart is a ceaseless activity, lasting from before birth to the end of life. Anatomy and Function

The human heart is a pear-shaped structure about the size of a fist.
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Pericardium

 

the closed, saclike structure surrounding the heart in vertebrate animals and in man. The pericardium is an isolated part of the secondary body cavity, the coelom. It consists of two layers: an external, parietal layer—the pericardium proper—and an internal, visceral layer—the epicardium. The pericardium proper consists, in turn, of an internal, serous layer and an external, fibrous layer. The epicardium, being an external membrane of the heart, directly covers and is fused to the heart muscle (myocardium). In the region where large blood vessels enter and leave the heart, the epicardium is turned back and is continuous with the pericardium proper. Between the pericardium layers is a slitlike cavity containing a small quantity of transparent pale-yellow serous fluid. The pericardium contains blood vessels, lymphatics, and numerous nerve endings and is surrounded by areolar connective tissue. It has many receptors, whose stimulation causes hemodynamic and respiratory changes.

pericardium

[‚per·ə′kärd·ē·əm]
(anatomy)
The membranous sac that envelops the heart; it contains 5-20 grams of clear serous fluid.

pericardium

the membranous sac enclosing the heart
References in periodicals archive ?
On histopathological evaluation, there were multifocal to coalescing, large aggregates of fibrin within pericardium sac and epicardium, with a marked diffuse infiltration of neutrophils (Figure 1C), as well as mesothelial proliferation and blood vessels in the pericardial sac.
Necropsy revealed a strongly adherent, thickened pericardial sac containing serosanguineous fluid and clotted blood.
He introduced a system of triage to manage patients according to the severity of their wounds and also successfully decompressed the pericardial sac of a patient by catheter drainage.
As the pressure in the pericardial sac increases, there is a decrease in right atrial and right ventricular diastolic filling capacity.
Christine Kollmorgen arrived, opened Amos' chest, and made an incision in the pericardial sac.
The pericardial sac would be sewn around one baby's heart and an artificial membrane created for the other.
The autopsies revealed that all of these lobsters died from perforation of the pericardial sac and these lobsters were not used in our experiments.
and a pioneer in the field of study known as IntraPericardial Therapeutics and Diagnostics (IPTD), which uses the pericardial sac enveloping the heart as a pathway for diagnostic procedures, such as MRI, and therapy, including ablation, drug delivery and electrophysiology.
In our work on the pericardial sac, we have worked with viruses--adenoviruses--and found that we can transduce large numbers of the cells within the sac extremely easily.
Placing DNA in the pericardial sac allows a soaking from the outside into the vessels," explains Dr.
A representative of Chiron indicated a belief "that the pericardial sac offers potentially very significant advantages over systemic and other local delivery approaches for the therapeutic and diagnostic management of patients with a wide variety of cardiovascular diseases.
But a catheter, inserted in her chest by an anesthesiologist to monitor fluids and blood pressure, pierced the lining of her heart and, undetected, steadily deposited fluid from an IV into Holston's pericardial sac during the period she was in post-operative care.