心房粘液瘤对心房除极的影响

为探讨心房粘液瘤对心房激动过程的影响,对19例左心房粘液瘤和2例右心房粘液瘤的VCG高倍P环(1mV=360mm)进行测量,结果显示不同部位粘液瘤对心房激动的影响不同,VCGP环亦不同.左心房粘液瘤P环时限延长,除左心房肥大外,较容易判断出双侧心有肥大、房内传导阻滞.右心房粘液瘤P环时限正常,仅表现右心房肥大.VCG上放大的P环能比ECG上P波更敏感地反映出心房异常活动的电变化.

Effect of atrial myxoma on atrial depolarization

In order to explore effect of atrial myxotna oh ex-citation prqcess of atrium, highly magnified P loops ofthe VCG(1 mV = 360mm) in 19 patients with left a-trial myxoma and 2 patients with right atrial myxoma.were measured. Result showed that myxoma in differ-ent parts of atrium had different effect on atrial excita-tion. Duration of P loop was prolonged in left atrialmyxoma, except the enlarged left atrium or both leftand right atria and intra-atrial conduction block couldbe judged easily. Duration of P loop was normal inright atrial myxoma, only presented enlarged right a-trium. In comparison with ECG, magnified P loop ofVCG could more sensitively reflect the abnormalchange of atrial electrical activity.