atrial


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atrial

 [a´tre-al]
pertaining to an atrium.
atrial natriuretic factor (ANF) a hormone produced in the cardiac atrium; it inhibits renin secretion and thus the production of angiotensin, and stimulates aldosterone release. Its effect is increased excretion of water and sodium and a lowering of blood pressure, which reduces the workload of the heart.
atrial septal defect a congenital heart defect in which the ostium primum or ostium secundum, openings in the septum primum of the embryonic heart, fail to close completely after birth. When an opening remains between the atria, some of the oxygen-rich blood from the left atrium passes into the right atrium and travels back to the lungs without being first transported through the body.
 Atrial septal defect. The shunt is from left atrium to right atrium. From Betz et al., 1994.

a·tri·al

(ā'trē-ăl),
Relating to an atrium.

atrial

/atri·al/ (a´tre-al) pertaining to an atrium.

atrial

(ā′trē-əl)
adj.
1. Of or relating to an architectural atrium.
2. Of or relating to an anatomical atrium.

atrial

adjective Relating to an atrium, usually understood as the atrium of the heart.

atrial

adjective Relating to an atrium, see there, usually understood to be the atrium of the heart.

a·tri·al

(ā'trē-ăl)
Relating to an atrium.

Atrial

Having to do with the upper chambers of the heart.

atrial

pertaining to an atrium.

atrial contraction
contraction of the atrial muscle; plays a part in ventricular filling and opening and closing of the A-V valves.
atrial filling
return of blood via the venae cavae and the pulmonary veins to the atria. Too slow a return means inadequate cardiac output, too slow emptying means an increase in central venous pressure and possibly the development of congestive heart failure. The rate varies normally with the cardiac cycle, being fastest during atrial diastole and slowest during atrial systole.
atrial natriuretic factor (ANF)
a peptide hormone found in cardiocytes of the right and left atria and released in response to increases in plasma volume. Plays a role in the regulation of blood pressure and volume, and in the excretion of water, sodium and potassium. Closely related or possibly identical substances include auriculin, atriopeptin, cardionatrin.
atrial rupture
most often is a complication of endocardiosis and valvular insufficiency in dogs. The resulting acute pericardial hemorrhage may cause death from cardiac tamponade.
atrial septal defect
a congenital heart defect in which there is persistent patency of the atrial septum, owing to failure of closure of the ostium primum or ostium secundum.
atrial standstill
complete lack of atrial contraction; ventricular function remains normal. Caused by hyperkalemia, extreme sinus bradycardia, digitalis toxicity and a congenital muscle disorder of dogs and cats.
atrial systole
see atrial contraction (above).
References in periodicals archive ?
For each additional 10 pounds, the atrial fibrillation rate increases by 31% in men and by 18% in women,' Magnussen said by email.
GLORIA-AF (Global Registry on Long-Term Oral Antithrombotic Treatment in Patients with Atrial Fibrillation) is a large, multinational, prospective registry programme involving patients with newly diagnosed non-valvular atrial fibrillation.
sup][8] Left atrial volumes were determined at ventricular end-systole according to area-length method using apical 4- and 2-chamber views.
However, atrial flutter is similar to afib in that it can raise the risk of stroke, heart failure and other complications.
Patients having underlying coronary atherosclerosis, valvular or congenital heart disease, LV systolic or diastolic dysfunction, or rhythmic abnormalities such as atrial fibrillation were excluded.
The Mechanical obstruction to flow across the mitral valve results in increased left atrial pressure with a rise in left atrial tension and myocardial oxygen consumption and the enlargement of the atrium is a manifestation of its failure.
Multifocal atrial tachycardia (chaotic atrial tachycardia).
The study also focused on the reliability of atrial appendage volume measurements as well as on factors that can cause enlarged atrial appendage.
Patients were excluded if they had any history of atrial fibrillation or atrial flutter lasting more than 5 minutes or if they required treatment with a vitamin K antagonist for any reason.
Atrial myxomas were the most prevalent heart tumor found during pathological studies.
Thus, the aim of the present study is to determine the maximum P-wave duration and P dispersion immediately after procedure and to compare these values in groups of patients underwent implantation of different devices such as ASO and a new device Occlutech Figulla atrial septal defect occluder (FSO).
69% per year in patients with no device-detected atrial high-rate episodes (AHREs), and 1.