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11 sty 2018 · Function. The right atrium contains the sinoatrial node(SA node) which helps the heart in regulating its rhythm. It acts as a pacemaker and contracts the cardiac muscles. The SA node is connected to the brain via the autonomic nerves which control the heart rate in maintaining blood pressure, oxygen and carbon dioxide homoeostasis.
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17 sie 2023 · The right atrium. The outer walls of the right atrium contribute to the convexity of the right pulmonary surface, the upper right part of the anatomical base, and the upper anterior surface of the heart. The dome of the atrium is pierced by the superior vena cava, while the posteroinferior part receives the inferior vena cava.
17 sty 2023 · The right atrium is on the right side of the heart, which collects and directs deoxygenated blood to the lungs. The left atrium, on the other hand, is on the left side of the heart and collects and directs oxygenated blood to the body.
Morphology/ Structure: The right atrium sits anterior, inferior and to the right of the left atrium. It forms a portion of the upper anterior (sternocostal) surface and a portion of the right pulmonary surface of the heart. The right atrium has thin muscular walls as it functions under low pressure.
The right atrium (RA) is located on the upper right-hand side of the heart (Fig. 24.1). It is a dynamic structure dedicated to receive deoxygenated blood return and to assist right ventricular (RV) filling.
On the anterior wall, the right auricle (right atrial appendage) is placed. The main function of the right auricle is to increase the volume of the right atrium. The muscular layer of the heart creates parallel ridges in the anterior wall and the auricle called the pectineal muscles.
25 sty 2022 · In this article, we review how a comprehensive assessment of RA dimensions and function using either echocardiography, cardiac computed tomography, and magnetic resonance imaging may be used as a first step towards a better understanding of RA pathophysiology.