非瓣膜性心脏病患者心房颤动发作持续时间不同对P波离散度的影响

目的　分析非瓣膜性心脏病患者心房颤动发作持续时间不同对P波离散度的影响。方法　根据房颤发作持续时间不同将 6 7例非瓣膜性心脏病患者分为两组 :短时房颤组 (≤ 4 8小时 ) 35例和长时房颤组 (>4 8小时 ,<3个月 ) 32例。同步体表 12导联心电图 ,计算P波最大时限和P波离散度 ;超声心动图测定左心房内径 ;分析P波最大时限和P波离散度与临床、超声参数之间的相关关系。结果　两组在年龄、性别和基础疾病组成方面无差别。长时房颤组左心房内径显著高于短时房颤组 [(40 .5 9± 2 .5 8)mmvs (38.6 0± 3.4 3)mm ,t =2 .70 4 ,P =0 .0 0 9]、P波最大时限长 [(12 2 .91± 11.74 )msvs(114 .6 9± 9.2 2 )ms,t =3.16 8,P =0 .0 0 2 ]、P波离散度大 [(6 0 .5 3± 11.14 )msvs(5 1.6 6± 10 .6 1)ms ,t =3.331,P =0 .0 0 1]。相关分析显示P波最大时限和P波离散度均与房颤发作持续时间 (r值分别为 0 .6 88,0 .5 4 6 ;P 均 <0 .0 0 1)和左心房内径相关 (r值分别为 0 .716 ,0 .6 0 3;P 均 <0 .0 0 1) ,与年龄无关。结论　长时房颤组较短时房颤组P波最大时限长和P波离散度大 ,与左心房扩大有关。     

无创检查可预测器质性心脏病房颤的发生

目的　研究无创检查对器质性心脏病房颤的预测。方法　总结我院近 5年来收治的 15 4例器质性心脏病患者的超声心动图及心电图检查资料 ,进行回顾性研究。测量 6 8例房颤组患者和 86例非房颤组患者的左房内径(LAD)、左室内径 (LVD)、左室射血分数 (LVEF)、左室舒张功能、最大P波 (Pmax)、最小P波 (Pmin)、P波离散度(pd)。 结果　两组病例 (房颤组vs非房颤组 ) :LAD(43.0 7± 6 .77)mmvs(36 .96± 5 .5 4 )mm、Pmax(12 3.0 7± 9.94 )msvs(113.0 1± 10 .86 )ms、Pd(6 3.6 5± 9.4 9)msvs(5 2 .6 1± 11.82 )ms,差异有统计学意义 (均为P <0 .0 0 1) ;年龄(6 9.5± 8.3)岁vs(6 5 .9± 11.1)岁 ,差异有统计学意义 (P <0 .0 5 ) ;左室舒张功能、P波离散度及左房内径与房颤关系密切。结论　测量窦性心律时左室舒张功能、P波离散度及左房内径可以预测器质性心脏病房颤的危险。     

Bone marrow-derived mononuclear cell therapy for patients with ischemic heart disease and ischemic heart failure

Objective: This meta-analysis aimed to assess whether bone marrow-derived mononuclear cells (BMMNCs) therapy may improve cardiac functional parameters in patients with ischemic heart disease (IHD) or ischemic heart failure (IHF).

Methods: Relevant randomized controlled trials (RCTs) were searched from web databases. Weighted mean difference was calculated for changes in left ventricular ejection fraction (LVEF), left ventricular end-diastolic and end-systolic volumes by using a random effects model.

Results: 13 RCTs met inclusion criteria. Compared with controls, BMMNCs therapy improved LVEF by 3.83% (95% confidence interval (CI): 2.10 – 5.56%; p < 0.0001) in patients with ischemic heart conditions. Notably, in patients with IHF, a more severe clinical condition when compared with IHD, BMMNCs therapy appeared more effective in LVEF improvement. While LVEF increased by 5.67% (95% CI: 3.65 – 7.69%; p < 0.00001) in IHF patients, it only increased by 2.19% (95% CI: 0.37 – 4.00%; p = 0.02) in patients with IHD.

Conclusions: BMMNCs therapy is associated with moderate but significant improvement over regular therapy in LVEF in patients with IHD and IHF. This observation, therefore, supports further RCTs conducting safety and efficiency of BMMNCs therapy with longer-term follow-up.     

瓣膜置换术同期行射频消融术治疗风湿性心脏病合并房颤的术后护理

目的总结瓣膜置换术同期行射频消融术治疗风湿性心脏病合并房颤的术后护理要点。方法对行瓣膜置换术同期行射频消融术后的患者做好各项护理,包括监测心率、心律变化及合理应用胺碘酮,临时起搏器的规范使用,维护内环境稳定及心功能,胸腔引流液量的重要性和及时处理,以及应用口服抗凝药的护理指导。结果本组53例患者手术成功,均为窦性心律,1例因肝肾功能衰竭死亡。结论射频消融术后护理尤其重要,对患者术后生活质量的提高有一定的改善。     

The patterns of anticoagulation control and the risk of stroke,bleeding and mortality in patients with non‐valvular atrial fibrillation

Summary. Background: Anticoagulation control is often summarized using the percentage of time spent in a therapeutic range (TTR). This method does not describe the timing and severity of fluctuations in the International Normalised Ratio (INR).Objective: To evaluate whether the TTR method can be improved by considering the patterns of INR over time.Methods: The cohort included adults aged 40+ years with atrial fibrillation (AF) and laboratory records of INR as recorded in the UK Clinical Practice Research Datalink. Statistical clustering techniques based on simple INR measures were used to describe the patterns of INR. Nested case–control studies calculated the odds ratios (ORs) for the risk of stroke, bleeding and mortality with TTR and different INR patterns. It was also evaluated whether cluster analyses improved the prediction of outcomes over TTR.Results: A number of 27 381 patients were studied with a mean age of 73 years. The OR for mortality was 3.76 (95% confidence interval [CI] 3.03–4.68) in patients with < 30% TTR compared with patients with 100% TTR. INR patterns were found to be best described by six different clusters. The cluster with the most unstable pattern was associated with the largest risk of mortality (OR 10.7, 95% CI 8.27–13.85) and stroke (OR 3.42, 95% CI 2.08–5.63). INR measures that predicted death independent of the TTR‐included absolute difference between two subsequent INR measurements and change relative to the mean over time.Conclusion: Cluster analysis of INR patterns improved the prediction of clinical outcomes over TTR and may help to identify warfarin users who need additional anticoagulation monitoring.     

前列地尔对肺心病心衰患者内皮素、心钠素的影响

目的 了解前列地尔对肺心病心衰患者血浆内皮素、心钠素的影响及PaO2、PaCO2,心功能的变化。方法 使用放免法测定40例慢性肺心病心衰患者静滴前列地尔前后血浆内皮素、心钠素浓度 ,同时检测PaO2、PaCO2 及观察心功能变化。结果 肺心病心衰患者的血浆内皮素 ,心钠素浓度显著高于健康组 ( p<0.001) ,静滴前列地尔后血浆内皮素、心钠素显著降低(t=3.82和3.75,p均<0.001) ,36例血气显著改善(p<0.01～0.001) ,39例心衰改善。结论 血浆内皮素、心钠素参与肺心心衰的发生与发展 ,前列地尔能够降低血浆内皮素、心钠素 ,改善血气 ,纠正心衰。     

心房纤颤心室率对心力衰竭患者血清NT-proBNP浓度的影响

目的 探讨心房纤颤(简称房颤)心室率对心力衰竭患者血清N-端脑利钠肽前体(NT-proBNP)浓度的影响.方法入选101例心力衰竭患者,按心电图诊断分为快速型房颤组(心室率大于100次/分,n=33)、普通型房颤组(心室率60～100次/分,n=32)和窦性心律组(n=36),再按纽约心脏病协会(NYHA)心功能分级标准分为心功能Ⅱ、Ⅲ和Ⅳ级3个亚组.采用胶体金法检测受试者血清NT-proBNP浓度并进行统计学分析.结果快速型房颤组、普通型房颤组及窦性心律组患者血清NT-proBNP浓度随NYHA心功能分级增加呈增高趋势,每组各亚组间比较差异有统计学意义(P＜0.05).窦性心律组、普通型房颤组、快速型房颤组患者血清NT-proBNP浓度在一定程度上呈增高趋势,但组间比较差异无统计学意义(P>0.05).在相同心功能分级亚组,快速型房颤组患者血清NT-proBNP浓度显著高于窦性心律组和普通型房颤组(P＜0.05),而普通型房颤组与窦性心律组比较,差异无统计学意义(P>0.05).结论 血清NT-proBNP浓度与心力衰竭严重程度相关;房颤对心力衰竭患者血清NT-proBNP浓度有一定影响,房颤心室率增快(超过100次/分)对血清NT-proBNP浓度影响越明显.     

术前干预对风湿性心脏病瓣膜置换术后心房颤动复律的影响

目的 探讨术前干预对风湿性心脏病瓣膜置换术后住院期间心房颤动发作的影响及其他影响因素.方法 将108例风湿性心脏病合并心房颤动行瓣膜置换术患者随机分为治疗组和对照组各54例.治疗组术前给予雷米普利、非洛地平、辛伐他汀三联治疗1个月及常规术前治疗;对照组只给予常规术前治疗.观察比较2组患者术后住院期间心房颤动发作情况.结果 治疗组与对照组复跳后即刻心房颤动的发生率差异无统计学意义(35.85%与41.51%,P=0.55),术后24 h心房颤动的发生率有统计学意义(39.62%与60.38%,χ2=4.57,P=0.03),住院期间心房颤动的发生率也有统计学意义(47.17%与69.81%,χ2=5.59,P=0.02).Logistic回归分析显示术前干预对术后住院期间心房颤动发作有影响(OR=0.39,95% CI0.17～0.86,P=0.018);影响心房颤动发作的主要因素还有左心房内径(OR=4.28,95% CI1.12～18.23,P=0.008)、心房颤动持续时间(OR=4.19,95%CI 1.15～14.22,P=0.011)、肺动脉压力(OR=3.28,95%CI 1.14～12.25,P=0.012)等.ROC曲线显示预测心房颤动时左心房内径最佳截点值为46.5 mm,预测房颤发作的敏感性为73%,特异度为85%;肺动脉压力最佳截点值为48.5 mm Hg,其敏感性为75.6%,特异度为80.3%;心房颤动持续时间最佳截点值为7.5个月,敏感性为76.1%,特异度为88.3%.结论 术前积极干预对心脏瓣膜置换术后住院期间可减少心房颤动的发生率,对术后窦性心律的维持也有有益的作用.

Abstract：

Objective To evaluate the influence of preoperation medical treatment on recurrence of atrial fibrillation(AF) in valve replacement postoperative patients of rheumatic heart disease during in-hospital and other risk factors. Methods One-hundred and eight patients with rheumatic heart disease and AF that underwent valve replacement postoperative patients were randomly divided into 2 groups: the treatment group (n =54)and the control group (n = 54 ). The treatment group were treated with ranipril, felodipine and simvastatin for 1 month and other conventional preoperational treatments before operation . The control group were only treated conventional preoperational therapy. Occurrence of AF postoperation were observed during inhospital. Results The occurrence of atrial fibrillation of the two group was no difference( 35.85% vs 41.51%,P = 0.55) immediately after rebeat. There was significant difference in the occurrence of atrial fibrillation of the 2 groups within 24 h post-operation ( 47.17% vs 69.81%, P = 0.02 ) . Logistic regression showed that intervention before operation had significant effect on the occurrence of AF( OR =0.39,95% CI: 0.17 -0.86,P =0.018) ,as well as the diameter of left atrium (LAD) ( OR= 4.28,95% CI:1.12 - 18.23, P = 0.018 ),pulmonary artery pressure(PAP) ( OR = 3.28,95% CI: 1.14 - 12.25, P = 0.01 ), duration of atrial fibrillation (AFD) (OR = 4.19,95% CI: 1.15 -14.22,P = 0.011). ROC curve showed that the best cut-off of LAD was 46.5 mm to predict AF,with sensitivity of 73% and specify of 85% ;the best cut-off of PAP was 48.5 mm Hg,with sensitivity of 75.6% and specify of 80.3% ;the best cut-off of AFD was 7. 5 months,with sensitivity of 76.1% and specify of 88.3%. Conclusion The recurrence of AF can be effectively reduced during hospitalization by the preoperational triple treatments for patients with rheumatic heart disease successfully underwent valve replacement operation , which is also beneficial for maintenance of sinus rhythm after operation.     

Mechanism of atrial fibrillation: decremental conduction, fragmentation, and ectopic activity in patients with drug resistance paroxysmal atrial fibrillation and structurally normal heart

Atrial fibrillation (AF) has been associated with premature beats and decreased atrial conduction velocity. This study examined a new index of dynamic inter-atrial conduction time (iaCT) in patients with paroxysmal AF (PAF). We compared 42 consecutive patients with paroxysmal AF (mean age = 52 +/- 16 years) without structural heart disease with 39 age-matched patients (mean age = 49 +/- 15 years) who underwent ablation of junctional tachycardias. Prior to investigation, all antiarrhythmic drugs were discontinued for an appropriate period of time. The following measurements were made: baseline iaCT (iaCTb) between high right atrium (HRA) and distal coronary sinus, iaCT during HRA pacing S1S1 600 ms (iaCTS1), maximum prolongation of iaCT during S2 and S3 delivery (iaCTS2, iaCTS3). We then derived the decremental index (DI), the maximum percent prolongation of iaCT = iaCT S3-iaCTS1/iaCTS1%. In patients with PAF, iaCTb was 81.3 +/- 24 ms versus 59.5 +/- 14 ms in controls (P = 0.0001). Atrial fibrillation was reproducibly and easily induced with a prominent increase in iaCT in 11 patients with AF. In this subgroup DI was 92 +/- 17%, compared to 45 +/- 21% in the other patients with AF (P = 0.0001) and 21 +/- 15% in the control group (P = 0.0001). Spontaneous isolated or repetitive ectopic activity was observed in 11 patients with AF (26%), and decremental atrial conduction was observed in 76% of patients with AF. This study supports the role of dynamic inter-atrial conduction disturbances in patients with lone PAF. The DI may be a new index of vulnerability to paroxysmal AF.     

心房颤动患者高凝状态研究

目的研究心房颤动(房颤)患者高凝相关指标及影响因素,探讨其临床意义。方法根据房颤患者是否有心力衰竭分为两组:房颤1组为无心力衰竭者(30例),房颤2组为有心力衰竭者(30例)。具器质性心脏病且心功能正常的窦性心律患者(40例)为窦性心律组,另选33例正常健康者为正常对照组。在慢性房颤患者、心脏病无房颤患者和健康正常人中,用酶联免疫法测定血浆D二聚体、用全自动血凝分析仪测定血浆纤维蛋白原(fibrinogen,Fg)。结果房颤1组患者D二聚体为474.5μg/L(220.0~843.9μg/L),房颤2组患者血浆D二聚体为657.9μg/L(365.8~1 448.6μg/L),明显高于窦性心律组271.6μg/L(186.6~426.2μg/L)和正常对照组179.5μg/L(131.4~235.1μg/L),(P<0.05)。房颤1组患者血浆Fg(3.74±0.76)g/L和房颤2组患者血浆Fg(4.25±0.95)g/L明显高于窦性心律组(3.26±0.80)g/L和正常对照组(2.97±0.72)g/L,(P<0.05)。与房颤1组比,房颤2组患者D二聚体、Fg显著升高(P<0.05)。与左房内径<40 mm的房颤患者比,左房内径≥40 mm的房颤患者D二聚体、Fg升高(P<0.05)。结论房颤患者存在着高凝状态,并且心力衰竭和左房扩大增加房颤的高凝状态,这些异常可能与房颤患者血栓形成和(或)栓塞事件相关。     

阿托伐他汀治疗老年冠心病患者合并阵发性房颤的临床疗效

目的探讨阿托伐他汀治疗老年冠心病(CHD)患者合并心房颤动(PAF)的临床疗效。方法将102例CHD合并PAF患者按就诊及住院顺序随机分为观察组和对照组,每组51例。对照组采用胺碘酮进行治疗,观察组采用阿托伐他汀联合胺碘酮进行治疗。结果观察组3、12、24h的转复率依次为66.7%、82.4%、86.3%,对照组依次为51.0%、68.6%、74.5%,各时点转复率经比较差异均有统计学意义(χ2=4.634、4.568、4.347,P<0.05);治疗后,观察组收缩压及舒张压均较对照组均显著降低(P<0.05),2组心率及不良反应发生率经比较差异均无统计学意义(P>0.05);观察组月平均发作次数及月总发作时间分别为(1.1±1.5)次和(0.16±0.3)h,均明显少于对照组的(2.8±0.6)次和(2.8±0.6)h(P<0.05);观察组与对照组总有效率分别为82.3%和61.5%,差异有统计学意义(χ2=10.510,P<0.05)。结论在胺碘酮注射治疗的基础上,应用阿托伐他汀治疗老年CHD合并PAF患者转复率高,复发率低,安全有效,值得临床推广应用。     

风湿性心脏病患者栓塞危险因素的探讨

目的　探讨风湿性心脏病 (RHD)患者栓塞发生率及栓塞的危险因素。方法　统计了我院 14 6例RHD患者的栓塞发生率。发生栓塞者 34例及无栓塞者 112例 ,根据有无栓塞进行单因素分析 ,最后用Logistic回归分析RHD发生栓塞的危险因素。结果　自然病程 (未换瓣 )的RHD患者栓塞发生率为 2 5 .6 % ,伴心房纤颤 (Af)栓塞发生率是 30 .4 % ,窦性心律者栓塞发生率是 9.7%。栓塞组年龄、左房内径 ,伴发Af比例较无栓塞组高 (P <0 .0 1～0 .0 5 )。Logistic回归分析显示高龄、左房内径大是栓塞的独立危险因素 (P <0 .0 5 )。接受换瓣手术和抗凝治疗是栓塞的保护因素 (OR =0 .0 3)。结论　RHD患者应给予抗凝治疗。     

15例心脏瓣膜置换术同期心房颤动射频消融病人的围术期护理

总结15例心脏瓣膜置换术同期心房颤动射频消融病人的围术期护理,强调应在术前改善病人的心功能,加强心理护理,术后及时发现和处理严重的心律失常,监测循环系统及呼吸系统,并做好血管活性药物的应用、心律失常的处理及抗凝治疗的护理。     

伴非瓣膜性心房颤动急性缺血性脑卒中合并脑微出血患者发生症状性脑出血危险因素分析

目的 探讨伴非瓣膜性心房颤动的急性缺血性卒中(AIS)患者合并脑微出血(CMBs)时,发生症状性脑出血(sICH)的危险因素.方法 选取自2016年4月至2020年11月于辽宁省人民医院住院治疗的83例伴非瓣膜性心房颤动的AIS患者为研究对象,患者均行头部核磁共振常规序列扫描和头部磁敏感加权成像(SWI)序列检查.根据SWI检查结果,将患者分为无CMBs组(n=27)与CMBs组(n=56).记录并比较两组患者年龄、性别、吸烟史、饮酒史、既往病史(高血压、糖尿病、卒中)、美国国立卫生院神经功能缺损(NIHSS)评分、非瓣膜性心房颤动患者脑卒中危险评分(CHA2DS2-VASc)、出血风险评分(HAS-BLEDS)等临床资料.记录CMBs的患者的严重程度分级、发生CMBs的部位以及抗凝药的种类、剂量、服用时间等,主要终点事件为口服抗凝药90 d内发生sICH,分析CMBs患者口服抗凝剂治疗的安全性.记录本研究纳入患者出血不良事件发生情况.结果 本研究出血事件发生率为16.9％(14/83).其中,小出血10例(12.1％),包括牙龈出血、皮肤瘀斑、痰中带血、便潜血、轻微眼底出血;临床相关非大出血2例(2.4％),包括便血、严重眼底出血;大出血2例(2.4％),为脑出血.2例患者分别于口服抗凝药物后第64天和第82天发生sICH.2例患者的出血部位均与原梗塞部位无关,但出血部位既往均存在CMBs病灶.CMBs组有高血压病病史患者比例高于无CMBs组,差异有统计学意义(P<0.05).多因素分析结果显示,NIHSS评分是伴非瓣膜性心房颤动的AIS合并CMBs患者发生sICH的独立危险因素(OR=0.448,95％可信区间0.150～1.344,P=0.032).结论 伴非瓣膜性心房颤动的AIS患者有较高的CMBs的发生率,高血压病史与CMBs的发生相关.当伴非瓣膜性心房颤动的AIS患者合并CMBs时,NIHSS评分是sICH发生的独立危险因素.     

心力衰竭并发心房颤动患者不同心室率与B型脑钠肽的关系探讨

目的探讨心力衰竭并发心房颤动患者不同心室率与B型脑钠肽(BNP)的相关性。方法入选本院心血管科62例心力衰竭患者,根据是否并发心房颤动分为3组:A组(n=20),为单纯心力衰竭患者;B组(n=20),并发慢性心房颤动(心室率小于100次/min);C组(n=22),并发快速心房颤动(心室率大于100次/min)。比较3组患者一般情况、心率及血浆BNP水平。结果 C组患者心率明显高于A组和B组,差异有统计学意义(P<0.01)。C组患者血浆BNP水平明显高于A组、B组,差异有统计学意义(P<0.01);B组患者血浆BNP水平明显高于A组,差异有统计学意义(P<0.01)。结论心房颤动患者心室率的加快会导致BNP水平的升高。     

静脉应用胺碘酮治疗老年冠心病并房颤的临床观察

目的观察胺碘酮治疗老年冠心病并快速心房颤动的临床疗效。方法26例老年冠心病患者,发作时快速房颤后静脉推注胺碘酮治疗,首次3-5 mg/kg,5-10 mg/min注入,继之以微量泵维持,前6 h 1 mg/min,其后0.5 mg/min,观察24 h临床症状及心率、血压的变化情况。结果静脉应用胺碘酮后显效18例（69.2%）,有效23例（88.8%）,无严重不良反应。结论胺碘酮应用于老年冠心病并房颤患者有效率高,副反应少,尤其适用于老年患者的抢救。     

Continuous versus intermittent monitoring of ventricular rate in patients with permanent atrial fibrillation

Background: Ventricular rate control (VRC) is an important treatment strategy for patients with permanent atrial fibrillation (AF). We assessed the prevalence of poor VRC and the adequacy of various intermittent monitoring regimens to accurately characterize VRC during permanent AF. Methods: We retrospectively analyzed data from dual chamber implantable cardioverter defibrillator (ICD) and cardiac resynchronization therapy defibrillator (CRT‐D) patients in the Medtronic Discovery? Link having permanent AF (AF burden >23 hours/day) and ≥365 consecutive days of device data. Poor VRC was defined as a day with the mean ventricular rate during AF >100 beats/minute (bpm) for ICD patients and >90 bpm for CRT‐D patients. Intermittent monitoring regimens were simulated from continuous device data by randomly selecting subsets of days in which data were available for analysis. Assessments of poor VRC were computed after replicating 1,000 simulations. Results: ICD (n = 1,902, age = 71 ± 10) and CRT‐D (n = 3,397, age = 72 ± 9) patients were included and followed for 365 days. The prevalence of poor VRC was 24.8% among ICD patients and 28.6% among CRT‐D patients. Significantly more patients were identified as having poor VRC with continuous monitoring compared to all intermittent monitoring regimens (sensitivity range = 8%–31%). Furthermore, 11.6% of ICD patients and 17.9% of CRT‐D patients experienced ≥7 days with poor VRC, to which the sensitivities of annual 7‐ and 21‐day recordings were <7% and <20%, respectively. Conclusions: A significant proportion of permanent AF patients experience poor VRC that would be missed with random intermittent monitoring. Whether improved knowledge of VRC with continuous monitoring will lead to improved outcomes compared to intermittent monitoring requires further study. (PACE 2012;1–7)     

骨髓增生异常综合征中基质细胞衍生因子1与血管新生及细胞凋亡的相关性研究

本研究探讨骨髓增生异常综合征(MDS)中骨髓基质细胞衍生因子-1(stromal cell-derived factor-1,SDF-1)的表达,及其与骨髓CD34+细胞的凋亡和骨髓血管新生的关系。搜集40例MDS病例,根据IPSS积分分为低危和高危2组,采集患者的骨髓穿刺物和活检标本。检测骨髓血浆中SDF-1的含量,骨髓CD34+细胞的凋亡率,骨髓活检标本的微血管密度(MVD)。结果显示:SDF-1α在低危组和高危组的表达量分别为(2313±417)pg/ml,(1241±501)pg/ml,前者显著高于后者(p<0.05);且2组的表达率均显著高于健康正常者(710±153)pg/ml(p<0.05);Annexin-Ⅴ/PI双染色显示,低危MDS患者CD34+细胞的凋亡率为(54.75±14.15)%,显著高于对照组的(18.51±8.66)%和高危组的(23.96±12.20)%(p<0.05),后两者相比差异无显著性(p>0.05);相关分析显示:低危组中骨髓SDF-1含量与CD34+细胞凋亡率呈正相关(p<0.05);在高危组中骨髓SDF-1含量与MVD呈现正相关(p<0.05)。结论:骨髓SDF-1含量、CD34+细胞凋亡和MVD在MDS中存在显著异常,在不同风险度的病例中也有明显的不同,且SDF-1水平与骨髓细胞的凋亡和血管新生具有相关性。     

甲状腺功能异常与稳定性心绞痛患者心房颤动的相关性

目的探讨甲状腺功能异常与稳定性心绞痛患者心房颤动的相关性。方法将360例稳定性心绞痛患者根据是否合并房颤分为房颤组和窦性心律组,比较窦性心律组及房颤组患者高敏C反应蛋白(hs-CRP)、甲状腺素(TSH)、游离三碘甲状腺原氨酸(FT3)、游离甲状腺素(FT4)水平。结果房颤组FT4及hs-CRP水平显著高于窦性心律组(P0.05)。2组TSH及FT3比较,差异无统计学意义(P0.05)。TSH0.55 m IU/L及4.78 m IU/L组患者hs-CRP及FT4水平均显著高于0.55~4.78 m IU/L组,房颤发生率显著高于0.55~4.78 m IU/L组(P0.05)。Logistic回归分析显示,甲状腺功能异常与稳定性心绞痛患者房颤发生的比例为甲状腺功能正常者的2.5倍(OR=2.56,95%CI为0.99~6.87)。结论存在甲状腺功能异常的稳定性心绞痛患者发生房颤的概率增加。