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Right atrial pressure (RAP) is the blood pressure in the right atrium of the heart. RAP reflects the amount of blood returning to the heart and the ability of the heart to pump the blood into the arterial system.
The right atrial appendage (lat: auricula atrii dextra) is located at the front upper surface of the right atrium. Looking from the front, the right atrial appendage appears wedge-shaped or triangular. Its base surrounds the superior vena cava. [6] The right atrial appendage is a pouch-like extension of the right atrium and is covered by a ...
It is an anatomical area located at the base of the right atrium, and its boundaries are the coronary sinus orifice, tendon of Todaro, and the septal leaflet of the right atrioventricular valve (also known as the tricuspid valve). [2] It is anatomically significant because the atrioventricular node is located at the apex of the triangle. The ...
Behind the crest (crista terminalis) of the right atrium the internal surface is smooth. [1] Pectinate muscles make up the part of the wall in front of this, the right atrial appendage. [citation needed] In the left atrium, the pectinate muscles are confined to the inner surface of its atrial appendage. [1]
The smallest cardiac veins vary greatly in size and number. Those draining the right atrium have a lumen of up to 2 mm in diameter, whereas those draining the right ventricle have lumens as small as 0.5 mm in diameter. [5]
Right atrial enlargement (RAE) is clinically significant due to its prevalence in diagnosing supraventricular arrhythmias. Further, early diagnosis using risk factors like RAE may decrease mortality because patients with RAE are at 9x more risk of arrhythmias and other cardiac conditions compared to their healthy counterparts. [ 2 ]
The right border of the heart (right margin of heart) is a long border on the surface of the heart, and is formed by the right atrium. The atrial portion is rounded and almost vertical; it is situated behind the third, fourth, and fifth right costal cartilages about 1.25 cm. from the margin of the sternum.
The sinus venarum (also known as the sinus of the vena cava, or sinus venarum cavarum [1]) is the portion of the right atrium in the adult human heart [2] where the inner surface [3] of the right atrium is smooth, [2] [3] whereas the rest of the inner surface is rough [3] (trabeculated [2]) due to the presence of pectinate muscles. [4]