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为探讨二尖瓣狭窄患者左房压力(LAP).左房内径(LAD)与心电图Pv_1终末电势(PTFV_1) 之间的关系,利用心导管技术结合心电图、二维超声心动图测量30例患者二尖瓣球囊成形术(PBMV)前后LAD、左室内径(LVD)、二尖瓣瓣口面积(MVA)LAP 和PTFV_1绝对值。结果显示,与术前相比.PBMV 后LAP 明显下降,MVA 明显增大。PTFV_1绝对值明显减少,LAD、LVD 无明显变化。进一步研究发现,PBMv 前LAP 与PTFv_1绝对值有一定的相关关系,提示在风心二尖瓣狭窄患者,PTFV_1所代表的压力负荷的异常比容量负荷异常更明显。此外,本文对PTFv_1产生机理进行了初步探讨。
To investigate the relationship between left atrial pressure (LAP), left atrial diameter (LAD) and end-pv potential (PTFV_1) in patients with mitral stenosis, cardiac catheterization combined with electrocardiogram and two-dimensional echocardiography LAD, left ventricular diameter (LVD), mitral valve area (MVA) LAP, and PTFV_1 absolute values before and after mitral balloon angioplasty (PBMV). The results showed that, compared with preoperative, the LAP decreased significantly after PBMV, MVA increased significantly. PTFV_1 absolute value decreased significantly, LAD, LVD no significant change. Further study found that, PBMv before LAP and PTFv_1 absolute value has a certain correlation, suggesting that in patients with mitral stenosis, PTFV_1 represents the abnormal pressure load than the capacity load abnormalities more obvious. In addition, the mechanism of PTFv_1 was discussed in this paper.