L C Prasanna, R Praveena, D'Souza A S, Bhat Kumar M R
Associate Professor, Department of Anatomy, Kasturba Medical Collage , Manipal University, Manipal, India .
Post-Graduate student, Department of Anatomy, Kasturba Medical Collage , Manipal University, Manipal, India .
J Clin Diagn Res. 2014 Feb;8(2):10-1. doi: 10.7860/JCDR/2014/7649.3992. Epub 2014 Feb 3.
During early embryonic development, absorption of pulmonary venous network by the left primitive atrial chamber results in opening of four pulmonary veins which drain independently into its chamber. The extent of absorption and hence, the number of pulmonary veins which open into the left atrium, may vary. As only few studies have been done, which have shown such variations, the present study was done to evaluate the possible variations in the pulmonary veins which opened into the left atrium.
Fifty formalin fixed adult cadaveric hearts were studied for variations in the opening of the pulmonary veins into left atrium.
Our results showed that 68% of the hearts which were studied, showed usual pattern of 2 pulmonary veins on either side, while remaining 32 % hearts showed variations in the number of pulmonary veins which opened. Twelve percent of the hearts showed 2 left and 3 right pulmonary veins, 14% of hearts showed 2 left and 1 right veins, 4% hearts showed 1 left and 2 right veins and 2% hearts showed 1 left and 4 right pulmonary veins opening into the left atrium.
Knowledge on such variations gains significance in isolation for radiofrequency ablation as a treatment for atrial fibrillation.
在胚胎发育早期，左原始心房腔对肺静脉网络的吸收导致四条肺静脉开口，它们独立引流至该腔室。吸收的程度以及因此进入左心房的肺静脉数量可能会有所不同。由于仅有少数研究显示了这种变异情况，因此开展本研究以评估进入左心房的肺静脉可能存在的变异。
对50颗用福尔马林固定的成人尸体心脏进行研究，以观察肺静脉进入左心房的开口变异情况（此处原文表述似乎有误，根据语境推测应该是“开口变异情况”）。
我们的研究结果显示，68%的被研究心脏呈现两侧各有2条肺静脉的常见模式，而其余32%的心脏在进入的肺静脉数量上存在变异。12%的心脏显示2条左肺静脉和3条右肺静脉，14%的心脏显示2条左肺静脉和1条右肺静脉，4%的心脏显示1条左肺静脉和2条右肺静脉，2%的心脏显示1条左肺静脉和4条右肺静脉进入左心房。
了解此类变异对于将射频消融作为心房颤动的一种治疗方法单独使用具有重要意义。
