扩张型心肌病血浆降钙素基因相关肽与淋巴细胞Ca2+的变化及关系

目的探讨扩张型心肌病（ＤＣＭ）患者血浆降钙素基因相关肽（ｃＧＲＰ）、淋巴细胞Ｃａ２＋的变化及关系。方法用放射免疫法和原子吸收光谱法分别测定３０例ＤＣＭ患者血浆ｃＧＲＰ、淋巴细胞Ｃａ２＋浓度，用直线相关法分析淋巴细胞Ｃａ２＋浓度与血浆ｃＧＲＰ水平及心功能的关系。结果ＤＣＭ患者血浆ｃＧＲＰ水平及淋巴细胞Ｃａ２＋浓度明显高于对照组（Ｐ值均＜０．００１），淋巴细胞Ｃａ２＋浓度与射血分数呈负相关（ｒ＝－０．５１，Ｐ＜０．０５），与血浆ｃＧＲＰ水平呈正相关（ｒ＝０．５８，Ｐ＜０．００１）。２０例ＤＣＭ患者经治疗好转后，血浆ｃＧＲＰ水平及淋巴细胞Ｃａ２＋浓度明显降低（Ｐ值均＜０．００１）。结论心肌细胞Ｃａ２＋超负荷是ＤＣＭ心功能损害的重要原因，血浆ｃＧＲＰ水平升高作为机体重要的代偿与防御机制参与了ＤＣＭＣａ２＋超负荷的病理生理过程     

经皮二尖瓣球囊扩张术前后血浆内皮素－1水平的对比研究

采用放射免疫分析法（ＲＩＡ）测定了３８例二尖瓣狭窄（ＭＳ）患者经皮球囊二尖瓣扩张术（ＰＢＭＶ）前后血浆内皮素－１（ＥＴ－１）水平，并与二尖瓣面积（ＭＶＡ）、左房内径（ＬＡＤ）及血液动力学参数作相关分析。结果显示：术前血浆ＥＴ－１水平较对照组显著升高（Ｐ＜０．００１），术后显著降低（与术前比Ｐ＜０．００１），但仍高于对照组（Ｐ＜０．００２）。血浆ＥＴ－１水平与平均肺动脉压、平均左房压和ＬＡＤ呈显著正相关（ｒ＝０．７８３，０．５１２和０．３５２，Ｐ＜０．００１，０．００２和０．０５），与其它血液动力学参数无明显相关关系。研究表明，ＥＴ－１在ＭＳ引起的病理生理改变中起重要作用，测定其变化，有可能作为判定病清程度及ＰＢＭＶ疗效的一个指标。     

经皮二尖瓣球囊扩张术前后血浆内皮素—1水平的对比研究

采用放射免疫分析法（ＲＩＡ）测定了３８例二尖瓣狭窄（ＭＳ）患者经皮球囊二尖瓣扩张术（ＰＢＭＶ）前后血浆内皮素－１（ＥＴ－１）水平，并与二尖瓣面积（ＭＶＡ），左房内径（ＬＡＤ）及血液动力学参数作相关分析。结果显示：术前血浆ＥＴ－１水平较对照组显著升高（Ｐ＜０．００１），术后显著降低（与术前比Ｐ＜０．００１），但仍高于对照组（Ｐ＜０．００２）。血浆ＥＴ－１水平与平均肺动脉压、平均左房压和ＬＡＤ呈显著正     

高血压患者硝苯地平治疗前后血浆内皮素和降钙素基因相关肽的变化

目的观察硝苯地平降压治疗对血浆内皮素（ＥＴ）和降钙素基因相关肽（ＣＧＲＰ）水平的影响。方法３１例原发性高血压（ＥＨ）患者口服硝苯地平控释片４０ｍｇ／ｄ×１４，用放免法直接测定治疗前后的血浆ＥＴ和ＣＧＲＰ水平。结果ＥＨ患者血浆ＥＴ水平明显高于对照组（８５．６±２１．０ｖｓ４２．１±２０．３ｐｇ／ｍｌ，Ｐ＜０．００１）；ＣＧＲＰ水平明显低于对照组（２３．０±８．１ｖｓ５５．４±１７．８ｐｇ／ｍｌ，Ｐ＜０．００１）。舒张压与ＥＴ水平呈正相关（ｒ＝０．５３０２，Ｐ＜０．００５），ＥＴ与ＣＧＲＰ呈弱的负相关（ｒ＝０．３７０７，Ｐ＜０．００５）。治疗后，血压和ＥＴ水平明显下降（Ｐ均＜０．００１），ＣＧＲＰ水平显著增高（Ｐ＜０．００１）。结论硝苯地平是一种有效的降压药，它可通过调节ＥＨ时多种血管活性多肽之间的平衡关系，对器官保护具有重要作用     

冠心病患者血浆降钙素基因相关肽水平的临床观察

选择符合ＷＨＯ诊断标准的急性心肌梗死（ＡＭＩ）２０例，心绞痛（ＡＰ）３０例，应用放射免疫分析法动态观察血浆降钙素基因相关肽（ＣＧＲＰ）含量变化，并与３０例正常人作对照。结果显示：对照组血浆ＣＧＲＰ含量为５１．３３±３７．１０ｎｇ／Ｌ，ＡＭＩ组发病第１天血浆ＣＧＲＰ含量为３５．７４±１０．４２ｎｇ／Ｌ，显著低于对照组（Ｐ＜０．０１），发病第３天开始升高（４４．０４±１２．４１ｎｇ／Ｌ），第７天趋于正常（５１．２４±１３．１０ｎｇ／Ｌ），与对照组比较无显著差异（Ｐ＞０．０５）。ＡＰ组在心绞痛发作期血浆ＣＧＲＰ含量为２３．１０±１７．１０ｎｇ／Ｌ，显著低于对照组（Ｐ＜０．００１），经治疗２ｗ症状缓解后复查血浆ＣＧＲＰ含量升高至３０．５５±２９．５８ｎｇ／Ｌ（Ｐ＜０．０５）。提示循环血中ＣＧＲＰ含量不足是ＡＭＩ、ＡＰ发病的重要因素之一。     

CGRP对呼吸窘迫综合征家兔血浆内皮素含量及肺循环血流动力学的影响

用降钙素基因相关肽（ＣＧＲＰ）防治急性肺损伤,观察ＣＧＲＰ对血浆内皮素（ＥＴ）含量的影响。结果表明:应用ＣＧＲＰ组血浆内皮素含量较呼吸窘迫综合征组降低了（３８±８）％（Ｐ＜０．０１）,ｍＰＡＰ,ＲＶＰ分别降低了（１８±３）％和（２５±４）％（Ｐ＜０．０５）。提示ＣＧＲＰ降低肺动脉压的作用可能与降低血浆内皮素水平有关;ＣＧＲＰ对急性肺损伤有一定的保护作用。     

充血性心力衰竭患者血浆肾上腺髓质素与内皮素、血管紧张素Ⅱ关系的初步研究

目的：研究充血性心力衰竭患者血浆肾上腺髓质素（ＡＭ）含量变化及其与血浆内皮素、血管紧张素Ⅱ的关系。方法：用放射免疫法测定了９５例心力衰竭患者（心力衰竭组）和５０例正常人（正常对照组）的血浆ＡＭ、内皮素和血管紧张素Ⅱ含量，同时用彩色超声心动图测定了５６例心力衰竭患者的左心室射血分数。结果：心力衰竭组患者血浆ＡＭ含量高于正常对照组（５０．６４±２３．１３ｎｇ／Ｌ比１６９２±４．０９ｎｇ／Ｌ，Ｐ＜０．００１）；心力衰竭患者血浆ＡＭ、内皮素、血管紧张素Ⅱ含量升高程度与心力衰竭严重程度相平行；心力衰竭患者血浆ＡＭ与内皮素、血浆ＡＭ与血管紧张素Ⅱ含量均呈显著正相关（ｒ＝０．７２１８，Ｐ＜０．００１；ｒ＝０．６５６６，Ｐ＜０．００１）；血浆ＡＭ含量与左心室射血分数呈显著负相关（ｒ＝－０．６２５８，Ｐ＜０．００１）；血浆ＡＭ与心力衰竭的原发病因无关。结论：ＡＭ参与了心力衰竭的病理生理过程，血浆ＡＭ升高可能与血浆内皮素和血管紧张素Ⅱ含量升高有关     

开展经皮二尖瓣球囊成形术的经验和体会

采用Ｉｎｏｕｅ法对５０例风心二尖瓣狭窄（ＭＳ）患者施行经皮二尖瓣球囊成形术（ＰＢＭＶ）治疗。单纯ＭＳ者１４例，伴二尖瓣返流（ＭＲ，１－２／４度）及轻度主动脉瓣病变３６例。房颤２１例，外科闭式分离术后再狭窄４例，术后血液动力学显著改善：左房平均压从２３．７±７．７降至１１．０±４．９ｍｍＨｇ（Ｐ＜０．００１），跨二尖瓣压差（ＭＶＰＧ）由２０．２±８．３降至４．１±３．２ｍｍＨｇ（Ｐ＜０．００１）。二尖瓣瓣口面积从０．９１±０．２０扩大到２．０３±０．２ｃｍ２（Ｐ＜０．００１），左房径从４．９６±０．８２缩小至４．１±０．５１ｃｍ（Ｐ＜０．０１），主功能从３±０．４６提高到１．３７±０．５１（Ｐ＜０．００１）。本组病例无１例发生严重并发症。掌握好房间隔穿刺技术，选择无明显瓣膜钙化和瓣下严重融合的病例，对房颤病人进行抗凝准备和正确掌握扩张终点是ＰＢＭＶ成功和减少严重并发症的重要保证。     

自发性高血压大鼠降钙素基因相关肽水平观察

目的探讨降钙素基因相关肽（ＣＧＲＰ）在高血压的发生、发展中的病理生理意义。方法采用放射免疫分析法测定常压大鼠（ＷＫＹ）和自发性高血压大鼠（ＳＨＲ）血浆、脑脊液、脑及主动脉血管中ＣＧＲＰ含量。结果ＳＨＲ血浆ＣＧＲＰ水平（３５．５±７．２５ｎｇ／Ｌ）较ＷＫＹ大鼠（４９．６±１０．３ｎｇ／Ｌ）显著降低（Ｐ＜０．０１）；脑脊液中含量分别为４８．７±９．４与５０．３±１０．５ｎｇ／Ｌ，两者差异无显著性（Ｐ＞０．０５）；ＳＨＲ脑、主动脉血管组织ＣＧＲＰ含量分别为１０３．０±１７．４，６９．３±１９．３ｎｇ／ｇ，较ＷＫＹ大鼠（６２．３±１５．８，３１．３±２４．４ｎｇ／ｇ）显著升高（Ｐ＜０．００１；Ｐ＜０．００５）。结论ＳＨＲ体内ＣＧＲＰ水平的变化可能与高血压的发生、发展有关     

老年慢性阻塞性肺疾病患者血浆内皮素－1含量与PaO_2、PaCO_2及肺动脉压的关系

目的探讨血浆内皮素－１（ｅｎｄｏｔｈｅｌｉｎ－１，ＥＴ－１）在慢性阻塞性肺疾病（ｃｈｒｏｎｉｃｏｂｓｔｒｕｃｔｉｖｅｐｕｌｍｏｎａｒｙｄｉｓｅａｓｅ，ＣＯＰＤ）中的作用。方法应用放射免疫法测定４３例老年ＣＯＰＤ急性发作期患者和１５名健康对照者血浆ＥＴ－１水平，其中８例肺心病患者行右心微导管检测肺动脉压。结果ＣＯＰＤ患者和肺心病患者的血浆ＥＴ－１含量分别为５．２４±０．５０、５．８０±０．６６ｐｇ／ｍｌ，较健康对照组血浆ＥＴ－１含量（４．６５±０．６５ｐｇ／ｍｌ）明显升高（Ｐ值＜０．０１及０．００１）；血浆ＥＴ－１含量与ＰａＯ２呈显著性负相关（ＣＯＰＤ组：ｒ值＝－０．５８３，Ｐ值＜０．０１；肺心病组：ｒ值＝－０．６２７，Ｐ值＜０．００１），与ＰａＣＯ２呈显著性正相关（ＣＯＰＤ组：ｒ值＝－０．５１４，Ｐ值＜０．０５；肺心病组：ｒ值＝０．５９３，Ｐ值＜０．００１）；ＥＴ－１含量与肺动脉收缩压及平均压均存在正相关（ｒ值＝０．７２７及０．６８１，Ｐ值均＜０．０５）。结论血浆ＥＴ－１参与肺心病肺动脉高压的形成，缺氧和二氧化碳潴留是刺激ＥＴ－１释放的重要原因之一     

The effect of percutaneous balloon mitral valvuloplasty on N-terminal- pro B- type natriuretic peptide plasma levels in mitral stenosis

The objectives of this study were to assess the effect of percutaneous mitral balloon valvuloplasty (PBMV) on the plasma levels of N-terminal-pro B-type natriuretic peptide (NT-proBNP) in patients with mitral stenosis (MS) and to investigate the relationship between the changes in hemodynamic variables and NT-proBNP levels after PBMV. Plasma NT-proBNP concentrations were obtained from 60 symptomatic patients with rheumatic MS who underwent PBMV, and in 35 age- and gender-matched healthy volunteers. Patients with MS were found to have significantly higher levels of plasma NT-proBNP compared to the control group (293 [77-1093] pg/mL versus 24 [12-67] pg/mL, respectively; [P < 0.001]). The mean preprocedural NT-proBNP level fell significantly from 293 (77-1093) pg/mL to 214 (69-1028) pg/mL (P < 0.001) following PBMV. The percentage decrease in plasma NT- proBNP levels was correlated only with the percentage decrease in systolic pulmonary artery pressure (r = 0.687, P < 0.001) and this correlation persisted in linear regression analysis (beta = -0.013; 95% CI [-0.018- -0.008] and P < 0.001). However, NT-proBNP levels did not correlate with the percentage of improvement in NYHA functional class, mitral valve gradients, or left atrial pressure (all P > 0.05). These findings indicate that NT-proBNP measurement following PBMV may be valuable for evaluating changes in pulmonary artery pressure and that elevated NT- proBNP levels in patients with MS may reflect the increased wall stress in the left atrium and right side of the heart.     

二尖瓣球囊扩张术对患者血浆B型利钠肽水平的影响

目的:观察二尖瓣球囊扩张术(PBMV)对二尖瓣狭窄患者血浆B型利钠肽(BNP)水平的影响。方法:检测30例成功施行PBMV的二尖瓣狭窄患者(窦性心律21例,心房颤动9例)术前、术后20 min及术后24 h的血浆BNP浓度,与8例对照者比较,并将BNP浓度与血流动力学参数作相关分析。结果:术前30例二尖瓣狭窄患者血浆BNP水平显著高于对照者(P<0．01);且与平均左心房压(r=0．441,P< 0．05)和肺动脉压(r=0．488,P<0．01)呈正相关。心房颤动患者与窦性心律患者BNP浓度无明显差异。术后20 mim及术后24 h窦性心律患者BNP浓度较术前显著下降(P均<0．05),术后24 h左心室舒张末容量(P<0．01)和每搏输出量(P<0．05)较术前相应增加,左心室舒张末压不变;术后20 min的BNP浓度变化与平均左心房压变化(r=0．696,P <0．01)及肺动脉压变化(r=0．456,P<0．05)呈正相关。术后心房颤动患者BNP浓度较术前无明显改变,左心室舒张末容量和每搏输出量相应不变,左心室舒张末压术后20 min较术前增加(P<0．01)。结论:二尖瓣狭窄患者血浆BNP浓度升高和左心房压及肺动脉压升高相关。心脏节律对球囊扩张术后血浆BNP的变化起重要作用,BNP是反映窦性心律患者球囊扩张术后左心房压及肺动脉压变化的敏感指标,但这一指标不适用于心房颤动患者。     

Copeptin level and copeptin response to percutaneous balloon mitral valvuloplasty in mitral stenosis

We aimed to investigate copeptin levels in mitral stenosis (MS) patients and the behavior of copeptin after hemodynamic improvement achieved by percutaneous balloon mitral valvuloplasty (PBMV). The study involved 29 consecutive symptomatic patients with moderate to severe rheumatic MS who underwent PBMV. Twenty-eight age- and gender-matched healthy volunteers composed the control group. Blood samples for copeptin were obtained immediately before and 24 h after PBMV, centrifuged, then stored at -70°C until assayed. The copeptin level of the patient group was statistically different from that of the control group (61.8 ± 34.4 and 36.8 ± 15.2 pg/ml, respectively; p = 0.001). PBMV resulted in a significant increase in mitral valve area and a significant decrease in transmitral gradient as well as systolic pulmonary artery pressure. While hemodynamic relief was obtained, we detected a statistically significant decline in copeptin levels 24 h after PBMV compared to the baseline levels (from 61.8 ± 34.4 to 44.1 ± 18.2 pg/ml; p = 0.004).     

经皮二尖瓣球囊扩张形术前后血栓素及前列环素水平的变化

对51例成功实现经皮二尖瓣球囊扩张成形术(PBMV)的患者,于术前、术后分别测定血栓素(TXB2)及6-酮前列环素F1a(6-K-PGF1a),并与30例正常人作对照。测得数值与二尖瓣口面积(MVA)、左房内径(LAD),二尖瓣跨瓣压差(MVPG)、心脏指数(CI)、平均左房压(MLAP)及右室收缩压(RVSP)进行相关分析。结果表明PBMV前TXB2高于对照组,6-K-PGF1a低于对照组(P＜0.05);PBMV后TXB2较术前降低,6-K-PGF1。增高(P＜0.01);TXB2与MVA呈负相关(r=-0.48,P＜0.05)。提示PBMV后TXB2、6-K-PGF1a水平的变化与MVA大小、MLAP高低密切相关。     

超声评价二尖瓣狭窄经皮二尖瓣球囊扩张术后心功能变化

目的:探讨经皮二尖瓣球囊扩张术(PBMV)治疗非单纯性二尖瓣狭窄(MS)的效果。方法:使用超声心动图检测33例单纯性MS、MS合并轻、中度二尖瓣关闭不全(MR)和MS合并轻、中度主动脉关闭不全(AR)二组患者PBMV术前及术后复查时左室射血分数(LVEF)值和心脏房、室内径大小变化。结果:3组PBMV术后复查时LVEF值较术前明显增大(P<0.001);左室内径与术前比较无显著差异(P<0.05);单纯性MS组和MS合并轻、巾度AR组PBMV术后复查时左房内径比术前明显减小(P<0.05);MS合并轻、中度MR组PBMV术后左房内径与术前比较无明显差异(P>0.05)。结论:非单纯性MS患者PBMV术后心功能也有明显好转。     

A new simplified method for calculating mean mitral pressure gradient.

BACKGROUND: Mean mitral valve pressure gradient (MVPG) is one of the key measures of the severity of mitral stenosis. The method for calculating MVPG, however, is complex and time consuming. The purpose of this study is to establish a new simple method for calculating MVPG. METHODS: Hemodynamic data were analyzed in 105 patients who underwent percutaneous balloon mitral valvuloplasty (PBMV). A new simplified method for calculating mitral pressure gradient was proposed, i.e., mean MVPG = MLAP - LVEDP/2, where MLAP is mean left atrial pressure, and LVEDP is left ventricular end-diastolic pressure. RESULTS: MVPGs derived from the standard and the new method were 13.28 +/- 7.42 mm Hg and 13.50 +/- 7.93 mm Hg, respectively, and there was no significant difference between the values of these two methods (P = 0.065). The MVPG derived from the new simplified method correlated closely with that calculated by the standard approach (r = 0.975, P < 0.001). Moreover, there was no significant difference between mitral valve areas (MVA) derived from the standard and the new approach either before or after PBMV in the 38 patients in whom cardiac output was measured. CONCLUSION: We conclude that mitral pressure gradient can be calculated reliably with our new simplified method.     

Impact of Pulmonary Artery Stiffness on Right Ventricular Function and Tricuspid Regurgitation after Successful Percutaneous Balloon Mitral Valvuloplasty: The Importance of Early Intervention

Aims: We assessed impact of pulmonary artery stiffness (PAS) on the long‐term right ventricular (RV) function and tricuspid regurgitation (TR) changes after percutaneous balloon mitral valvuloplasty (PBMV). Methods and Results: Using Doppler echocardiography, PAS was calculated by dividing maximal frequency shift of pulmonary flow by the acceleration time, and mitral area, RV function, and degree of TR severity were evaluated before, immediately after, 6 months, and 12 months after successful PBMV in 81 consecutive patients. Compared with control subjects patients with mitral stenosis (MS) had significant higher PAS (P < 0.001). The PAS was significantly lower in patients with progressive RV function improvement and regression of TR (P < 0.001). PAS was significantly correlated with the degree of pulmonary artery systolic pressure (PASP), tricuspid annular plane systolic excursion (TAPSE), and E/E'm ratio (P < 0.0001, <0.0001, and < 0.001, respectively). Multivariate regression analysis showed that the PAS is an independent predictor of TR regression and sustained RV functional improvement after successful PBMV (P < 0.0001). Conclusions: The changes in RV function and TR after successful PBMV were significantly correlated with the degree of PAS. Despite a sustained increase in mitral valve area, some patients showed no regression of TR, and progressive RV dysfunction suggests a significant role of PAS on RV function and the degree of TR regression in patients with MS suggests that PBMV must be performed early, utilizing PAS as a noninvasive parameter for proper timing for PBMV.     

经皮球囊二尖瓣成形术的远期疗效

目的 观察经皮球囊三尖瓣成形术近期及远期疗效.方法 自1992年4月至2008年11月采用Inoue单球囊法对1768例风湿性心脏病二尖瓣狭窄患者行经皮球囊二尖瓣成形术(PBMV)治疗.对其中自1992年4月至1998年8月426例术后10年患者进行随访.球囊扩张前后均采用同步记录左心房和左心室压力,计算二尖瓣跨瓣压差.术前、术后及随访中均采用超声心动图检查和临床心功能评价.结果 1748例完成PBMV治疗,成功率为98.86%.左心房平均压由术前(38±7)mm Hg(1 mm Hg=0.133 kPa)下降至(12±4)mm Hg(P<0.001),二尖瓣平均跨瓣压差由术前(28±6)mm Hg下降至(8±3)mm Hg(P<0.001),二尖瓣口面积由术前(0.98±0.26)cm~2增加至(1.97±0.39)cm~2(P<0.001).主要并发症为死亡2例,急性心包填塞1例,肺水肿1例,重度二尖瓣反流12例,脑栓塞2例.426例PBMV术后10年随访,心功能仍然维持在纽约心功能Ⅰ～Ⅱ级而未冉进行PBMV或换瓣术者288例(67.6%),冉狭窄140例(33.3%),死亡31例(7.5%).结论 PBMV是治疗风湿性心脏病二尖瓣狭窄的有效方法 .     

Neurohormones in mitral stenosis before and after percutaneous balloon mitral valvotomy

BACKGROUND AND AIM OF THE STUDY: The hormonal response to percutaneous balloon mitral valvotomy (PBMV) has been described in patients in sinus rhythm (SR) and with atrial fibrillation (AF). The study aim was to evaluate the effect of hemodynamic parameters and PBMV on atrial natriuretic factor (ANF) secretion and plasma renin activity (PRA) in mitral stenosis in SR and AF. METHODS: Thirty-one patients (26 females, five males; mean age 50.5+/-14 years) with pure rheumatic mitral stenosis underwent PBMV. Fourteen patients had AF, and 17 were in SR. PRA and ANF were measured 24 h before, and at 30 and 60 min, 24 h and one month after PBMV, after resting in a supine position for > or =2 h. Digitalis and diuretics were withdrawn 48 h before sampling; neither had patients received ACE inhibitors or beta-blockers during the previous month. RESULTS: PBMV was successful in all cases, without complication. Mitral valve area was increased and wedge pressure decreased in both groups after PBMV. In AF patients, neither PRA nor ANF were significantly affected before and after PBMV; in SR patients, ANF was decreased and PRA increased significantly, notably 24 h after PBMV. The cardiac index was increased in both groups, but was distinctly lower in AF patients both before and after PBMV. CONCLUSION: Despite similar hemodynamic results, reversal of the hormonal pattern after PBMV occurred only in SR patients, most likely because in AF patients a low cardiac index elicits a hormonal response similar to heart failure. This abnormal hormonal pattern may limit functional recovery after PBMV; hence, PBMV is best attempted while patients are still in SR.     

风心病二尖瓣狭窄合并窦性心律患者经皮球囊二尖瓣成形术后即刻P波离散度变化与左房平均压变化之间的关系

目的探讨风心病二尖瓣狭窄合并窦性心律患者经皮球囊二尖瓣成形术(PBMV)后即刻P波离散度(Pd)变化与左心房(左房)平均压(LMAP)变化之间的关系。方法选取成功进行PBMV风心病二尖瓣狭窄合并窦性心律患者32例,测量PBMV术前、术后即刻Pd、LMAP、二尖瓣口面积(MVA)及左房大小(LAS),计算Pd变化值,并与LMAP、MVA和LAS变化值行相关性分析。结果PBMV术后即刻Pd与LMAP明显减小(P<0.05)、MVA明显增加(P<0.05)、LAS无明显变化(P>0.05);Pd变化值仅与LMAP变化值之间具有相关性。结论风心病二尖瓣狭窄合并窦性心律患者PBMV术后即刻Pd变化与LMAP变化可能有关,提示心房牵张可能是引起风心病二尖瓣狭窄合并窦性心律患者Pd变化的原因。