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下腔静脉异位引流是因为胚胎时期下腔静脉发育畸形导致肝心静脉和主静脉连接阻碍,造成下腔静脉上段缺如使肾段以下体静脉血经奇静脉或半奇静脉引流,通过上腔静脉或其它途径汇入心脏,故又称下腔静脉中断或下腔静脉肝段缺如,其发生率占心血管畸形的0.6%左右。先天性心脏病并发下腔静脉异位引流,常规轨道无法建立,
Ectopic drainage of inferior vena cava is due to embryonic development of inferior vena cava malformations leading to hepatic venous and main venous obstruction, resulting in the inferior vena cava inferior segment of the renal artery below the venous blood through the azygos vein or semi-azygos vein drainage through the upper chamber Intravenous or other means of remitted to the heart, it is also known as inferior vena cava or hepatic segment incompetence, the incidence of cardiovascular malformations accounted for about 0.6%. Congenital heart disease complicated by ectopic drainage of inferior vena cava, conventional orbit can not be established,