Left Ventricular Rapid Pacing Via the Valve Delivery Guidewire in Transcatheter Aortic Valve Replacement

ObjectivesThis study investigated whether left ventricular (LV) stimulation via a guidewire-reduced procedure duration while maintaining efficacy and safety compared with standard right ventricular (RV) stimulation.BackgroundRapid ventricular pacing is necessary to ensure cardiac standstill during transcatheter aortic valve replacement (TAVR).MethodsThis is a prospective, multicenter, single-blinded, superiority, randomized controlled trial. Patients undergoing transfemoral TAVR with a SAPIEN valve (Edwards Lifesciences, Irvine, California) were allocated to LV or RV stimulation. The primary endpoint was procedure duration. Secondary endpoints included efficacy, safety, and cost at 30 days.ResultsBetween May 2017 and May 2018, 307 patients were randomized, but 4 were excluded because they did not receive the intended treatment: 303 patients were analyzed in the LV (n = 151) or RV (n = 152) stimulation groups. Mean procedure duration was significantly shorter in the LV stimulation group (48.4 ± 16.9 min vs. 55.6 ± 26.9 min; p = 0.0013), with a difference of –0.12 (95% confidence interval: –0.20 to –0.05) in the log-transformed procedure duration (p = 0.0012). Effective stimulation was similar in the LV and RV stimulation groups: 124 (84.9%) versus 128 (87.1%) (p = 0.60). Safety of stimulation was also similar in the LV and RV stimulation groups: procedural success occurred in 151 (100%) versus 151 (99.3%) patients (p = 0.99); 30-day MACE-TAVR (major adverse cardiovascular event-transcatheter aortic valve replacement) occurred in 21 (13.9%) versus 26 (17.1%) patients (p = 0.44); fluoroscopy time (min) was lower in the LV stimulation group (13.48 ± 5.98 vs. 14.60 ± 5.59; p = 0.02), as was cost (€18,807 ± 1,318 vs. €19,437 ± 2,318; p = 0.001).ConclusionsCompared with RV stimulation, LV stimulation during TAVR was associated with significantly reduced procedure duration, fluoroscopy time, and cost, with similar efficacy and safety. (Direct Left Ventricular Rapid Pacing Via the Valve Delivery Guide-wire in TAVR [EASY TAVI]; NCT02781896)     

上颌窦内壁分隔的 CBCT 观测

目的：通过CBCT观测上颌窦内壁间隔的解剖特点及分布规律。方法：调取苏州口腔医院放射科接受CBCT扫描的汉族患者的CT图像资料360例。 Mimics 17．0软件对上颌窦进行三维重建。对上颌窦间隔的发生率、数目、形态、位置及双侧分布状况进行观测。结果：360例中,上颌窦间隔的人群总发生率为37．8％,双侧发生占34．6％,双侧相关系数tau值为0．357（P＜0.01）。分布位置常位于磨牙区。不同性别组、年龄组、牙列缺失缺损及牙列完整组间发生率的差异无统计学意义（P＞0．05）。结论：上颌窦间隔在汉族人具有较高的发生率,了解其解剖特点及分布规律具有重要的临床意义。     

无牙颌种植后即刻负重的临床回顾研究

目的探讨无牙颌患者种植后进行即刻负重修复技术的可行性和临床效果。方法从2012年1月至2015年3月间,共22例无牙颌患者合计140枚种植体植入后行即刻负重,均于48 h内完成种植体支持的临时义齿修复,4~6个月后行永久修复。对该修复方案下的种植体留存率、种植体边缘骨吸收情况、种植体稳固性及周围龈组织状况以及患者应用的临床效果进行观察和研究。结果 22例共140枚种植体行即刻负重,其中有3枚种植体失败,种植体留存率为97.9%。种植体负重后6个月和12个月的边缘骨吸收量分别为(0.62±0.11)mm和(0.74±0.13)mm。通过对患者的病例回顾发现共有4例发生不同程度的机械并发症,包括修复体折裂、重衬、人工牙脱落等。种植体周围龈组织健康,未出现明显的红肿。临时义齿固位良好,患者满意度高。结论选择适当的病例,应用种植外科和修复技术对无牙颌患者行即刻负重修复是可行的,可获得理想的临床效果,近期疗效可靠。     

第三磨牙即刻移植52例临床研究

目的 :观察第三磨牙即刻移植修复无法保留的第一、二磨牙的临床效果。方法 :52例病例,拍摄治疗前X线片并测量受植区间隙及骨量。第三磨牙自体移植3个月后,根据临床检查及X线检查评价疗效。结果:经随访3月~5年,40例移植牙稳固,牙周无炎症,能正常行使功能,牙根无吸收,骨质愈合良好。11例牙根有轻度吸收,1例失败,术后跟踪随访。结论:第三磨牙即刻移植修复第一、二磨牙临床效果满意。     

Minimizing Permanent Pacemaker Following Repositionable Self-Expanding Transcatheter Aortic Valve Replacement

ObjectivesThis study sought to minimize the risk of permanent pacemaker implantation (PPMI) with contemporary repositionable self-expanding transcatheter aortic valve replacement (TAVR).BackgroundSelf-expanding TAVR traditionally carries a high risk of PPMI. Limited data exist on the use of the repositionable devices to minimize this risk.MethodsAt NYU Langone Health, 248 consecutive patients with severe aortic stenosis underwent TAVR under conscious sedation with repositionable self-expanding TAVR with a standard approach to device implantation. A detailed analysis of multiple factors contributing to PPMI was performed; this was used to generate an anatomically guided MInimizing Depth According to the membranous Septum (MIDAS) approach to device implantation, aiming for pre-release depth in relation to the noncoronary cusp of less than the length of the membranous septum (MS).ResultsRight bundle branch block, MS length, largest device size (Evolut 34 XL; Medtronic, Minneapolis, Minnesota), and implant depth > MS length predicted PPMI. On multivariate analysis, only implant depth > MS length (odds ratio: 8.04; 95% confidence interval: 2.58 to 25.04; p < 0.001) and Evolut 34 XL (odds ratio: 4.96; 95% confidence interval: 1.68 to 14.63; p = 0.004) were independent predictors of PPMI. The MIDAS approach was applied prospectively to a consecutive series of 100 patients, with operators aiming to position the device at a depth of < MS length whenever possible; this reduced the new PPMI rate from 9.7% (24 of 248) in the standard cohort to 3.0% (p = 0.035), and the rate of new left bundle branch block from 25.8% to 9% (p < 0.001).ConclusionsUsing a patient-specific MIDAS approach to device implantation, repositionable self-expanding TAVR achieved very low and predictable rates of PPMI which are significantly lower than previously reported with self-expanding TAVR.     

冠状动脉内支架置入术对有与无心肌梗死史患者QT离散度影响的比较

探讨和比较冠心病患者经过成功冠状动脉 (简称冠脉 )内支架置入术对有与无心肌梗死史的病人QT离散度(QTd)影响的程度 ,选择术前QTd≥ 60ms者 1 0 0例 ,根据有无心肌梗死病史分为两组 ,其中无心肌梗死组 62例 ,心肌梗死组 38例 ,于术前、后 72h分别做 1 2导联同步心电图进行测量QTd和计算校正QTd(QTcd)。在无心肌梗死组中 ,支架置入术后 ,QTd、QTcd明显缩短 (分别为 51± 1 9vs 72± 34ms,54± 2 4vs 81± 37ms;P <0 .0 5) ;而在心肌梗死史组中 ,术后QTd、QTcd上无显著变化 (分别为 70± 2 6vs74± 30ms ,80± 30vs82± 32ms;P >0 .0 5)。结论 :冠脉内支架置入术显著缩短无心肌梗死史冠心病患者的QTd和QTcd ,而对有心肌梗死冠心病患者的QTd和QTcd无影响     

Coronary sinus focus acting as a trigger for atrial fibrillation in a patient with orthotopic heart transplantation

Coronary Sinus Focus Acting as a Trigger for Atrial Fibrillation. We report the case of a 46-year-old man who presented for evaluation and ablation of paroxysmal atrial fibrillation, which he developed one year prior to presentation and that was refractory to antiarrhythmic drugs. His past medical and surgical history was significant for orthotopic heart transplantation (OHTX) and idiopathic nonfamilial dilated cardiomyopathy. We present the first case of post OHTX where the coronary sinus was acting as a trigger and driver for atrial fibrillation. This illustrates an unusual role of nonpulmonary vein foci in the etiology of atrial fibrillation in patients status post OHTX.     

经皮埋置125碘籽治疗不能切除性胰腺癌

目的 研究经皮埋置^125碘籽对不能手术切除性胰腺癌的治疗价值。方法 在B超监视下，经皮穿刺注入^125碘籽入胰肿瘤内。按肿瘤大小，注入30～80粒，放射活性15～40mCi。结果 13例均为不能手术切除的进展期胰腺癌，经^125碘籽局部埋置后，69．2％的病例腹痛改善，38．5％的病例腹痛几乎完全消失；53．8％的病例肿瘤缩小；中位生存期13个月，6、12、18和24个月生存率分别为92.3％、53．8％、38．5％和15．3％。结论 经皮植入^125碘籽对病人的侵袭性小，而取得的结果与常规手术、放化疗的结果大体相似，可作为不能切除性胰腺癌的治疗手段。     

颈动脉狭窄合并认知功能障碍患者支架植入后脑血流动力学变化的初步研究

目的：探究颈动脉狭窄（CAS）合并认知功能障碍（CI）患者支架植入后脑血流动力学（CHD）变化,以及CHD改善与CI的关系。方法选择江门市中心医院神经内科一区2012年1月至2013年6月入院的CAS合并CI患者26例,所有患者均行颈动脉支架植入术,分别在术前和术后采用蒙特利尔认知估量表（Montreal cognitive assessment,MoCA）、简易精神评估量表（MMSE）评价患者的认知功能,同时以64排螺旋CT进行灌注成像显影（CTP）,统计患者狭窄血管供血区和非供血区（大脑后动脉供血区,一般选取狭窄血管同侧的枕叶）的相对脑血流量（rCBF）、相对脑血容量（rCBV）和相对达峰时间（rTTP）等CHD指标。结果患者MoCA、MMSE得分术前分别为（15.3±3.9）分、（21.0±3.4）分,术后3个月分别为（20.6±3.4）分、（25.2±3.0）分,术前术后MoCA、MMSE得分比较差异具有统计学意义（P〈0.05）;狭窄血管供血区术前rCBF、rCBV和rTTP得分分别为（0.98±0.15）分、（0.97±0.12）分和（1.05±0.11）分,而术后分别为（0.96±0.11）分、（0.97±0.14）分和（1.00±0.06）分,rCBF和rTTP术前术后差异具有统计学意义（P〈0.05）。结论支架植入手术能显著改善CAS合并CI患者的CHD,同时也能改善患者的认知功能。     

MSCT 在义齿种植术前评估中的应用简

目的 应用多层螺旋CT（MSCT）对拟种植义齿的牙槽骨区域进行扫描,对种植进行指导.方法 对我院符合入组标准需要义齿种植患者进行术前MSCT扫描.结果 32例患者均获得良好的颌骨数据,均取得良好的术前评估效果.结论 MSCT为义齿种植提供了可靠的影像评价指标,为义齿种植的成功提供了支持.