论文摘要
背景:由二尖瓣脱垂及连枷样二尖瓣引起的慢性严重性二尖瓣返流会造成左心室的功能衰竭和扩张。然而这一进展过程及预测因子并没有被解释透彻,特别是目前尚无运用组织多普勒方法(TDI)进行研究的报道。本研究拟用TDI对这一过程加以探讨,并推测TDI对于左心室的代偿失调有预测作用。方法:连续入选中等程度以上(>Ⅲ级)的器质性二尖瓣返流病人153例(54±17岁,52%男性),病人的左心室射血分数都在正常范围(LVEF≥55%)。所有病人都进行前后两次常规超声心动图检查及脉冲TDI检查(基线、随访),两次检查相隔时间为650±362天。所有病人按随访检查左心室收缩末期容积是否超过基线的20%分为左心室显著扩张组和左心室未显著扩张组。结果:病人随访检查经体表面积纠正后的左心室收缩末期容积(17±5 to20±6 ml/m2,P<0.001)、舒张末期容积(49±12 to 55±13 ml/m2,P<0.001),左心房容积(35±14 to 42±17 ml/m2,P<0.001)都较基线检查有显著增加,二尖瓣返流程度和TDI的E/E’指标也有显著增加。TDI的左心室二尖瓣瓣环(侧壁、室间隔)的早期舒张速度(E’)却有显著减低,两次检查LVEF、左心房泵血分数(LAEF)、TDI二尖瓣瓣环收缩速度(S’)及舒张晚期速度(A’)基本相同。40例病人左心室有显著性扩张(26%),较左心室未显著扩张组,其基线的TDI S’及A’值更低,LAEF更低,其值与随后发生的左心室扩张程度有显著相关性。多变量分析证实基线A’是左心室扩张与否的独立预测因子(P<0.001),Receiver-Operator-Characteristic曲线下面积为0.78(95%CI 0.70-0.86)。A’<11.0cm/s预测随后左心室显著扩张的特异性为90%,敏感性为64%。结论:慢性严重的器质性二尖瓣返流,返流量不断增加的同时,左心室和左心房的重塑也在不断进展。TDI检查A’降低(左心房泵血功能降低)可以预测随后左心室的扩张。
论文目录
相关论文文献
- [1].Severe mitral annular calcification in rheumatic heart disease:A rare presentation[J]. World Journal of Cardiology 2012(03)
- [2].Caseous mitral annular calcifications: Multimodality imaging characteristics[J]. World Journal of Radiology 2010(04)
- [3].MitraClip:a novel percutaneous approach to mitral valve repair[J]. Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011(08)
- [4].Repair of anterior mitral leaflet prolapse using artificial GoreTex loops in preoperatively echo-determined length[J]. South China Journal of Cardiology 2012(03)
- [5].Percutaneous balloon mitral valvuloplasty in an 8-year-old boy with rheumatic mitral stenosis[J]. South China Journal of Cardiology 2013(02)
- [6].Application of real-time 3d echocardiography in mitral valve repair for replacement of chordae tendineae[J]. China Medical Abstracts(Surgery) 2011(03)
- [7].Surgical incision in complete video-assisted mitral valve replacement[J]. South China Journal of Cardiology 2014(02)
- [8].A combined anti-thrombotic therapy for thrombosis of mitral prosthetic valves[J]. South China Journal of Cardiology 2013(02)
- [9].Early variation of left ventricular dimension and mitral regurgitation after correction for anomalous origin of the left coronary artery from the pulmonary artery[J]. South China Journal of Cardiology 2012(04)
- [10].Myomectomy and mitral plasty for mitral abnormalities in hypertrophic obstructive cardiomyopathy[J]. China Medical Abstracts(Surgery) 2011(03)
- [11].Prosthesis-patient mismatch in the mitral valve position:the initial result of a single-institutional observational study in China[J]. China Medical Abstracts(Surgery) 2011(03)
- [12].Surgical management of moderate ischemic mitral valve regurgitation: Where do we stand?[J]. World Journal of Cardiology 2014(11)
- [13].Analysis of risk factors for left atrial thrombosis in patients with rheumatic mitral stenosis[J]. China Medical Abstracts(Surgery) 2011(03)
- [14].Echocardiographic Monitoring of Cardiac Parameters after Mitral Valve Replacement with the Preservation of Subvalvular Structures[J]. Chinese Medical Sciences Journal 2011(01)
- [15].Late intervention in an asymptomatic pediatric patient with anomalous left coronary artery[J]. World Journal of Cardiology 2014(08)
- [16].Surgical treatment of anterior mitral valve prolapse using artificial chordal loop[J]. China Medical Abstracts(Surgery) 2011(03)
- [17].Preventive Effect of Gastrodin on Cognitive Decline after Cardiac Surgery with Cardiopulmonary Bypass:A Double-Blind,Randomized Controlled Study[J]. Journal of Huazhong University of Science and Technology(Medical Sciences) 2011(01)
- [18].Analysis of the pathological severity degree of aortic stenosis (AS) and mitral stenosis (MS) using the discrete wavelet transform (DWT)[J]. 中国神经肿瘤杂志 2013(01)
- [19].Clinically unrecognized mitral regurgitation is prevalent in lone atrial fibrillation[J]. World Journal of Cardiology 2012(05)
- [20].Alterations of cardiac functions after chordae tendineae rupture using echocardiogram in dogs.[J]. 畜牧与兽医 2012(S2)
- [21].Postoperative management of patients with repair of anomalous origin of the left coronary artery from the pulmonary arterya report of 30 cases[J]. South China Journal of Cardiology 2012(03)
- [22].Cardiac mass in a patient with colorectal cancer:“Not all that glitters is gold!”[J]. World Journal of Cardiology 2011(03)
- [23].Heart,cardiovascula,vascular disorder[J]. China Medical Abstracts(Surgery) 2010(03)
- [24].Miliary nodules due to secondary pulmonary hemosiderosis in rheumatic heart disease[J]. World Journal of Radiology 2011(02)
- [25].超声心动图对糖尿病肾病左心结构及功能变化的研究[J]. 医学研究生学报 2011(04)
- [26].《South China Journal of Cardiology》Subject Index Volume 14, 2013[J]. South China Journal of Cardiology 2013(04)
- [27].运用MitraClip术行经导管二尖瓣修复一例[J]. 中国介入心脏病学杂志 2012(03)
- [28].二尖瓣关闭不全患者围术期左心功能改变的临床研究[J]. 河南外科学杂志 2010(03)
- [29].二尖瓣脱垂综合征研究进展[J]. 临床荟萃 2013(11)
- [30].儿童先天性二尖瓣狭窄1例[J]. 南昌大学学报(医学版) 2013(12)