Oclusión total de la arteria coronaria derecha y disfunción de la arteria del nodo sinoatrial / A total occlusion of the right coronary artery and a dysfunction of the sinoatrial node artery

Resumen La arteria del nodo sinoatrial irriga al marcapasos principal del corazón y su oclusión o lesión puede generar arritmias. Se reportó un infarto de miocardio inferior, el cual presentó oclusión total trombótica proximal de la coronaria derecha, y presentó desde extrasístoles atriales hasta bloqueo atrioventricular. Se describieron las 6 rutas que puede seguir la arteria del nodo sinoatrial y las distintas manifestaciones clínicas que puede tener su oclusión o daño. Se deben realizar estudios de prevalencia para conocer la distribución de esta arteria en la población mexicana, y poder predecir con mayor probabilidad los trastornos del ritmo.

Abstract The sinus node artery irrigates the main pacemaker of the heart and its occlusion or damage can generate arrhythmias. We reported the case of a patient that had an inferior myocardial infarction due to total thrombotic occlusion of the proximal right coronary artery, atrial premature beats and an atrioventricular block. We described the 6 routes that the sinus node artery can follow and the different clinical manifestations that can be observed if occluded. Prevalence studies should be conducted to determine the distribution of this artery in the Mexican population, and to be able to predict rhythm disorders with a higher probability.

The Measurement of the Sinus Node Artery in Adults with Multi-slice Spiral CT / 实用放射学杂志

Objective To study the value of measurement of sinus node artery in adults with multi-slice spiral CT(MSCT).Methods 119 cases were examined by MSCT coronary artery angiography.The diameter of the sinus node artery,the distance from the origin of the sinus node artery to the origin of the coronary artery(S-O),to the origin of left circumflex branch(LO-O),and to straightly the aortic wall erectly(S-W) and the angle between the sinus node artery and the proximal segment of the coronary artery(the angle of S-C) were measured on axial and MIP images.Results The origin,morphological characteristics of the sinus node artery were shown clearly on CT coronary artery angiography,and the diameter,length,the distance of S-W,S-O and LO-O and the angle of S-C were measured precisely.Conclusion The parameters of the sinus node artery measured by MSCT are basically corresponded with those on anatomy,MSCT may be used to show the sinus node artery.