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Right Atrium
Right Atrial Appendage Coronary Sinus Ostium Crista Terminalis Fossa Ovalis Inverior Vena Cava Ostium Interatrial Septum Lateral Wall Triangle of Koch Tricuspid Valve
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Location:
The lateral wall is generally considered to include the wall of the right atrium from the ostia of the superior and inferior vena cava anteriorly to the ostium of the right appendage or auricle. The endocardial surface of the lateral wall includes both smooth muscle, in the posterior region between the vena cava and the crista terminalis, and pectinate muscle from the crista terminalis into the right atrial appendage. The anterior region of the lateral wall, surrounding the ostium of the right appendage, is often referred to as the right atrial free wall.

Importance in cardiovascular diseases:
The right atrial lateral wall is considered by some to have a role in the genesis of several atrial arrhythmias, including atrial reentry and focal atrial tachycardia.

Importance in device delivery:
The lateral wall is sometimes used to place right atrial pacing leads. The anterior aspect of the lateral wall is one of the thinnest walls of the heart, resulting in a higher than usual risk for perforation when extracting a lead from this location.

Localización:
la pared lateral incluye la pared de la aurícula derecha desde los orificios de la vena cava superior e inferior en sentido anterior hasta el ostium de la orejuela derecha. La superficie endocárdica de la pared lateral incluye tanto músculo liso en la región posterior entre la vena cava y la cresta terminalis, como los músculos pectíneos desde la cresta terminal hacia la orejuela derecha. La región anterior de la pared lateral que rodea el ostium de la orejuela derecha se denomina pared libre de la aurícula derecha.

Importancia en las enfermedades cardiovasculares:
se considera que puede tener un papel en la arritmogénesis de varias arritmias auriculares, incluida la reentrada auricular y la taquicardia auricular focal.

Importancia en implante de dispositivos:
se utiliza en ocasiones para implantar cables de estimulación auricular derecha. La región anterior de la pared lateral es una de las paredes más delgadas del corazón, lo que implica un alto riesgo de perforación al extraer un electrodo de esta ubicación.

 

 

 

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