atrial septum

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Related to atrial septum: interatrial septum, Ventricular septum


 [sep´tum] (L.)
1. a wall or partition dividing a body space or cavity. Some are membranous, some are osseous, and some are cartilaginous; each is named according to its location. See also septal defect. adj., adj sep´tal.
alveolar septum interalveolar septum.
atrial septum (septum atrio´rum cor´dis) interatrial septum.
atrioventricular septum the part of the membranous portion of the interventricular septum between the left ventricle and the right atrium.
deviated septum an injury or malformation of the nasal septum so that one part of the nasal cavity is smaller than the other; this is fairly common and seldom causes complications. Occasionally the deviation may handicap breathing, block the normal flow of mucus from the sinuses during a cold, or prevent proper drainage of infected sinuses. In some cases surgery (called partial or complete submucous resection) may be necessary to relieve the obstruction and reduce irritation and infection in the nose and sinuses.
interalveolar septum
1. one of the thin plates of bone separating the alveoli of the teeth in the mandible and maxilla. Called also interradicular septum.
2. one of the thin septa that separate adjacent pulmonary alveoli, containing connective tissue and the capillary network of the blood supply of the lung. Defs. 1 and 2 called also alveolar septum.
interatrial septum (septum interatria´le cor´dis) the partition separating the right and left atria of the heart; called also atrial septum.
interradicular septum interalveolar septum (def. 1).
interventricular septum (septum interventricula´re cor´dis) the partition separating the right and left ventricles of the heart; called also ventricular septum.
nasal septum a plate of bone and cartilage covered with mucous membrane that divides the nasal cavity.
septum lu´cidum septum pellucidum.
pellucid septum (septum pellu´cidum) the triangular double membrane separating the anterior horns of the lateral ventricles of the brain; called also septum lucidum.
septum pri´mum a septum in the embryonic heart, dividing the primitive atrium into right and left chambers. See also congenital heart defect.
rectovaginal septum the membranous partition between the rectum and vagina.
rectovesical septum a membranous partition separating the rectum from the prostate and urinary bladder.
septum of ventricles of heart (ventricular septum) (septum ventriculo´rum cor´dis) interventricular septum.

atrial septum

Etymology: L, atrium, hall, saeptum, fence
a partition between the left and right atria of the heart.


(sep'tum) plural.septa [L. saeptum, a partition]
A wall dividing two cavities. septal (-tal), adjective

atrial septum

Interatrial septum

septum atriorum cordis

Interatrial septum.

atrioventricular septum

The septum that separates the right and left atria of the heart from the respective ventricles.

crural septum

Femoral septum.

deviated septum

A nasal septum displaced to one side. It sometimes causes impaired air flow through a nostril.

femoral septum

Connective tissue that closes the femoral ring. Synonym: crural septum

interatrial septum

The myocardial wall between the atria of the heart.

interdental septum

The bony partition across the alveolar process between adjacent teeth that forms part of the tooth sockets.

intermuscular septum

1. A connective tissue septum that separates two muscles, esp. one from which muscles may take their origin.
2. One of two connective tissue septa that separate the muscles of the leg into anterior, posterior, and lateral groups.

interradicular septum

One of the thin bony partitions between the roots of a multirooted tooth that forms part of the walls of the tooth socket.

interventricular septum

The myocardial wall between the ventricles of the heart.

lingual septum

A sheet of connective tissue underlying the midline groove (median sulcus) separating the halves of the tongue.

mediastinal septum

A partition between two parts of an organ or cavity.

nasal septum

The partition that divides the nasal cavity into two nasal fossae. The bony portion is formed by the perpendicular plate of the ethmoid bone and the vomer. The cartilaginous portion is formed by septal and vomeronasal cartilages and medial crura of greater alar cartilages. Both sides of the septum are covered with mucous membranes.

orbital septum

A fibrous sheet extending partially across the anterior opening of the orbit within the eyelids.

septum pectiniforme

Comblike partition that separates the corpora cavernosa.

septum pellucidum

A thin, translucent, triangular sheet of nervous tissue consisting of two laminae attached to the corpus callosum above and the fornix below. It forms the medial wall and interior boundary of the lateral ventricles of the brain Synonym:

septum primum

In the embryonic heart, a septum between the right and left chambers.

rectovaginal septum

The layer of fascia between the rectum and the vagina.

rectovesical septum

The membranous septum between the rectum and the urinary bladder.

septum scroti

The partition dividing the left and right sides of the scrotum.

tracheoesophageal septum

In the embryo, the partition that develops between the growing laryngotracheal tube (the future larynx, trachea, and lungs) and the developing esophagus.

ventricular septum

Interventricular septum.
References in periodicals archive ?
coenobita in having closely arising and extended epigynal teeth, posteriorly situated atrium, and the broad, round spermathecae but can be distinguished by the presence of atrial septum and separated spermathecae (Figs.
Atrial myxoma typically appears as a well-circumscribed mobile mass that is attached to the atrial septum.
With three-dimensional echocardiography, he said, physicians can obtain beautiful, real-time pictures of the atrial septum, mitral valve, and aortic valve structure.
A doctor's examination revealed that a part of his atrial septum had begun to grow scar tissue, which obstructed blood flow.
A third type of ASD, called sinus venosus ASD, is an absence of tissue at the very superior portion of the atrial septum, close to the origin of the superior vena cava (see Figure 4).
Robert was one of the first two children to have the procedure, performed by cardiologist Dr Joseph De Giovanni and known as the Atrial Septum Defect Occluder System.
Chanel, now three, was born with hypolastic left heart syndrome with an added complication of an intact atrial septum - a rare combination - and has undergone 11 surgeries since being born, three of which were open heart surgeries.
For right sided PAPVC to right atrium, intra atrial septum was excised to create atrial septal defect and pulmonary veins were rerouted into left atrium in two patients while in one patient there was secundum ASD already so pulmonary vein was rerouted by autologous pericardial patch after enlarging atrial septal defect.
Patent foramen ovale, atrial septum aneurysm, and stroke.
Scarlett was born by Caesarean section on July 13 suffering from hypoplastic left heart syndrome with an intact atrial septum - a rare combination which means only half her heart was operating.
RESULTS: On examination of right atrium, the patent foramen ovale was found at the superior part of oval fossa with easy introduction of a probe across the atrial septum.