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

(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.
References in periodicals archive ?
When atrial contraction is affected by impaired ventricular filling, the a-wave appears absent or reversed, which can be diagnosed by visual assessment.
After mitral valve opening, because of LA rapid emptying and shortening (conduit phase), atrial S decreases, until reaching a plateau, during diastasis, followed by a second positive peak, but lower than the first, that corresponds to the period that precedes atrial contraction. Then there is a negative peak, at the end of atrial contraction.
AF is a supraventricular arrhythmia characterized by disorganized atrial depolarisations without effective atrial contractions. If AF terminates spontaneously, it is defined as paroxysmal.
Preoperative pressure and volume loading increase the role that atrial contraction plays in ventricular filling and cardiac output.
* An S4 indicates increased strength of the atrial contraction.
Our observations using selective cineangiograms and intravascular ultrasound of the CS in patients with normal sinus rhythm demonstrated additional evidence of narrowing of the CS during atrial contraction (Fig.
Patients with overt left ventricular dysfunction, increasingly prevalent at later ages [16], tend to operate even higher on the Frank-Starling curve and are critically dependent on the contribution of atrial contraction to maintain left ventricular end-diastolic volume.
Symptoms as a result of atrial fibrillation are determined by multiple factors, including the underlying cardiac status, the rapid ventricular rate, and loss of atrial contraction. (1)
AF is characterized by disorganized atrial depolarization without effective atrial contraction (irregular contraction) and irregularly irregular due to ventricular response concealed conduction AF is not life-threatening by itself but sometimes requires emergency treatment for hemodynamic alterations or can lead to systemic embolism.
Shunt flow from left atrium to right atrium is seen from mid systole to early diastole and during atrial contraction. Right ventricle volume increase might be higher than left ventricle volume increase during early diastole and atrial contraction.13
In atrial fibrillation, chaotic atrial electric conduction from multiple ectopic foci causes ineffective atrial contraction (Bucher, 2011).
(3) Ventricular diastole includes isovolumic relaxation, early passive filling after mitral valve opening, and active filling during atrial contraction. Transmission of high ventricular pressure to the pulmonary circulation leads to pulmonary edema, dyspnea, and other symptoms of HE Factors other than abnormal diastolic physiology, such as chronic volume overload, ventricular coupling dyssynchrony, increased autonomic tone leading to reduced venous capacitance, and chronotropic intolerance, may also be involved.