Saddle pulmonary embolism commonly refers to a large pulmonary embolism that straddles the bifurcation of the pulmonary trunk, extending into the left and right pulmonary arteries.If large enough, it can completely obstruct both left and right pulmonary arteries resulting in right heart failure and, unless treatment is prompt, death.With such extensive embolic burden, signs of right heart strain are usually present and include:dilatation of the right ventricle (RV) (i.e. RV width > left ventricular width) straightening or leftward bulging of the interventricular septum enlargement of the pulmonary trunk. Contrast reflux into the azygos vein, via the superior vena cava, and hepatic veins, via the inferior vena cava, is a controversial sign of RV strain, as it often occurs in the absence of raised right-sided heart pressures.
馬鞍型肺動脈栓塞通常是指橫跨肺動脈干分叉處的大面積肺栓塞，延伸至左、右肺動脈，如果足夠嚴重，可完全阻塞左、右肺動脈，導致右心衰，除非及時治療，否則會導致死亡。有如此廣泛的栓塞負擔，右心功能障礙通常是存在的：包括右心室（RV）膨大（即右心室寬度>左心室寬度）、伸直或左室間隔增厚、肺動脈干增大。造影劑通過上腔靜脈回流至奇靜脈和通過下腔靜脈回流至肝靜脈是右心功能障礙的一個有爭議的征象，因為它通常發(fā)生在右心室壓力升高的情況下。
本站僅提供存儲服務(wù)，所有內(nèi)容均由用戶發(fā)布，如發(fā)現(xiàn)有害或侵權(quán)內(nèi)容，請
點擊舉報。
