pericardium

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Related to pericardial sac: Pleural sac

pericardium

 [per″ĭ-kahr´de-um]
the fibroserous sac enclosing the heart and the roots of the great vessels, composed of external (fibrous) and internal (serous) layers.
adherent pericardium one abnormally connected with the heart by dense fibrous tissue.
fibrous pericardium the external layer of the pericardium, consisting of dense fibrous tissue.
parietal pericardium the parietal layer of the serous pericardium, which is in contact with the fibrous pericardium.
serous pericardium the inner, serous portion of pericardium, consisting of two layers, visceral and parietal; the space between the layers is the pericardial cavity.
visceral pericardium the inner layer of the serous pericardium, which is in contact with the heart and roots of the great vessels. Called also epicardium.

per·i·car·di·um

, pl.

per·i·car·di·a

(per'i-kar'dē-ŭm, -ă), [TA]
The fibroserous membrane, consisting of mesothelium and submesothelial connective tissue, covering the heart and beginning of the great vessels. It is a closed sac having two layers: the visceral layer (epicardium), immediately surrounding and applied to all the heart's surfaces, and the outer parietal layer, forming the sac, composed of strong fibrous tissue (fibrous pericardium [TA]) lined with a serous membrane (serous pericardium [TA]). The phrenic nerves pass to the diaphragm through the anterior pericardium and divide the pericardium into antephrenic and retrophrenic portions; the pulmonary hilum divides both of these portions into suprahilar, hilar, and infrahilar portions.
[L. fr. G. pericardion, the membrane around the heart]

pericardium

/peri·car·di·um/ (-kahr´de-um) the fibroserous sac enclosing the heart and the roots of the great vessels.pericar´dial
adherent pericardium  one abnormally connected with the heart by dense fibrous tissue.

pericardium

(pĕr′ĭ-kär′dē-əm)
n. pl. pericar·dia (-dē-ə)
The membranous sac filled with serous fluid that encloses the heart and the roots of the aorta and other large blood vessels.

per′i·car′di·al (-dē-əl), per′i·car′di·ac′ (-dē-ăk′) adj.

pericardium

[per′ikär′dē·əm] pl. pericardia
Etymology: Gk, peri + kardia, heart
a fibroserous sac that surrounds the heart and the roots of the great vessels. It consists of the serous pericardium and the fibrous pericardium. The serous pericardium consists of the parietal layer, which lines the inside of the fibrous pericardium, and the visceral layer, which adheres to the surface of the heart. Between the two layers is the pericardial space, which contains a few drops of pericardial fluid to lubricate opposing surfaces of the space and allow the heart to move easily during contraction. Injury or disease may cause fluid to accumulate in the space, causing a wide separation between the heart and the outer pericardium. The fibrous pericardium, which constitutes the outermost sac and is composed of tough, white fibrous tissue lined by the parietal layer of the serous pericardium, fits loosely around the heart and attaches to large blood vessels emerging from the top of the heart but not to the heart itself. It is relatively inelastic and protects the heart and the serous membranes. If pericardial fluid or pus accumulates in the pericardial space, the fibrous pericardium cannot stretch, causing a rapid increase of pressure around the heart. pericardial, adj.
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Pericardium

per·i·car·di·um

, pl. pericardia (per'i-kahr'dē-ŭm, -ă) [TA]
The fibroserous membrane, consisting of mesothelium and submesothelial connective tissue, covering the heart and beginnings of the great vessels. It is a closed sac having two layers: the visceral layer (epicardium), immediately surrounding the heart, and the outer parietal layer, forming the sac, composed of strong fibrous tissue, the fibrous pericardium, lined with a serous membrane, the serous pericardium.
Synonym(s): heart sac, theca cordis.
[L. fr. G. perikardion, the membrane around the heart]

pericardium

The double-layered membranous sac that completely envelops the heart. The inner layer is attached to the heart and the outer layer to the DIAPHRAGM and the back of the breastbone (sternum). The two layers are separated by a thin film of lubricating fluid.

pericardium

a sac-like envelope surrounding the vertebrate heart and the pericardial cavity in arthropods and molluscs.

Pericardium

The pericardium is the thin, sac-like membrane that surrounds the heart. It has two layers: the serous pericardium and the fibrous pericardium.

pericardium

fibroserous, double-layered membrane surrounding the heart

per·i·car·di·um

, pl. pericardia (per'i-kahr'dē-ŭm, -ă) [TA]
The fibroserous membrane, consisting of mesothelium and submesothelial connective tissue, covering the heart and beginning of the great vessels.
[L. fr. G. pericardion, the membrane around the heart]

pericardium (per´ikärdēəm),

n a fibroserous sac that surrounds the heart and the roots of the great vessels.

pericardium

the fibroserous sac enclosing the heart and the roots of the great vessels, composed of external (fibrous) and internal (serous) layers. See also pericardial.

adherent pericardium
one abnormally connected with the heart by dense fibrous tissue.
congenitally absent pericardium
the heart lies free in the pleural sac; recorded in dogs.
fibrous pericardium
the external layer of the pericardium, consisting of dense fibrous tissue.
parietal pericardium
the parietal layer of the serous pericardium, which is in contact with the fibrous pericardium.
serous pericardium
the inner, serous portion of pericardium, consisting of two layers, visceral and parietal; the space between the layers is the pericardial cavity.
visceral pericardium
the inner layer of the serous pericardium, which is intimately attached to the heart and roots of the great vessels. Called also epicardium.
References in periodicals archive ?
17,20) Because of its close relationship to the heart wall, the pericardial sac can usually be seen sonographically only in the presence of disease.
She presented with cardiac tamponade, her pulse returning after the pericardial sac was excised and 300 cc of blood evacuated.
The patient may also present with distended neck veins as the pressure increases in the pericardial sac, impeding the forward flow of blood (Hawley & Dreher, 2002).
Autopsies revealed that six lobsters died within three days of tagging from the rupture of the dorsal thoraco-abdominal membrane, one died after one day from the perforation of the pericardial sac, and six died between three to sixteen days after tagging from a perforated hepato-pancreas (Table 2).
During the surgery, Holston's heart stopped beating for several minutes, and the surgeon discovered that her pericardial sac was full of fluid.
After identifying the phrenic nerve, with the use of dissectors and electrocautery, a 4 cm longitudinal incision was made in the pericardial sac.
The tip had gone through the right atrium, and into the pericardial sac of the patient's heart.
Another 525 mL was drained from the pericardial sac over the next 48 hours.
Repeated chest films showed progressive re solution of the air in the pericardial sac and the mediastinum, and the patient was discharged.
The pericardial sac contained dark red, opaque fluid (hemopericardium).
Pericardial effusion is a condition characterized by excess fluid in the pericardial sac that surrounds the heart.