Transcatheter aortic valve replacement is an effective treatment for aortic stenosis currently, especially in elderly, surgical high-risk, and surgical procedures-intolerant patients with severe aortic stenosis. After several generations of updates in design and function, the self-expandable valves have shown significant efficacy in treating aortic stenosis patients with bicuspid aortic valve, bioprosthetic valve failure or small annulus, and superiority in terms of valve durability, and the favorable hemodynamic outcomes could translate into clinical endpoint benefit. This literature review summarizes the advantages and recent advances of the self-expandable valves in transcatheter aortic valve replacement.
Objective To evaluate the safety and efficacy of transcatheter aortic valve replacement (TAVR) using the SAPIEN 3 system. MethodsThis was a prospective, multicenter, single arm study in 4 centers in China. The clinical data of 50 patients with high-risk symptomatic severe aortic stenosis who underwent TAVR using the SAPIEN 3 system from June 2017 to June 2019 were analyzed, including 27 males and 23 females aged 76.8±6.1 years. ResultsThe Society of Thoracic Surgeon score was 6.0%±2.8%. Totally, 20.0% of patients had severe bicuspid aortic stenosis. The operation time was 41.8±16.5 min and the hospital stay time was 8.5±5.0 d. At the postoperative 30-day follow-up, no all-cause mortality occurred and the device success rate was 89.5%. Major vascular complications occurred in one (2.0%) patient, stroke in one (2.0%) patient, new pacemaker implantation in one (2.0%) patient, as well as coronary artery obstruction in one (2.0%) patient. There was no moderate or moderate/severe paravalvular leak. The aortic pressure gradient was decreased from 49.2±16.2 mm Hg before the operation to 12.4±4.6 mm Hg at the postoperative 30-day follow-up, and the valvular area was increased from 0.6±0.3 cm2 to 1.3±0.3 cm2 (P<0.01). Moreover, the New York Heart Association classification in 83.7% of the patients was improved during the follow-up. ConclusionThis pre-marketing multicenter study has demonstrated the safety and effectiveness of transfemoral TAVR with the SAPIEN 3 transcatheter valve system in Chinese aortic stenosis patients at high risk for surgery.
Objective To evaluate the application value of spiral CT virtual endoscopy and three dimensional imaging in fiberoptic bronchoscopic balloon dilation in patients with benign tracheobronchial stenosis. Methods Thirty-three cases of benign tracheobronchial stenosis from June 2004 to November 2008 were checked by spiral CT with airway tracheobronchial reconstruction. For the patients with indications, balloon dilatation was performed under fiberoptic bronchoscope. The three-dimensional reconstruction images were compared with the findings under bronchoscopy. And the preoperative and postoperative three-dimensional reconstruction images were compared for airway diameter. Results Three cases were found stenosis of middle lobe by CT virtual endoscopy and did not undergo balloon dilatation. The remaining 30 cases were confirmed by bronchoscopy findings similar to the images by tracheobronchial reconstruction with CT, with consistent rate of 100% . Immediate postoperative three-dimensional CTreconstruction of tracheal bronchus revealed that diameter of stenotic bronchus increased from ( 2. 7 ±1. 3) mm to ( 6. 9 ±1. 6) mmafter operation. Conclusion Multislice spiral CT virtual endoscopy is helpful in fiberoptic bronchoscopic balloon dilation in patients with benign tracheobronchial stenosis and postoperative follow-up.
Objective To summarize the experience of applying biliary balloon dilator to prevent rebleeding after operation for hepatolithiasis combined with hemobilia. Methods From 2003 to 2008, 11 patients were reoperated to stop from hemobilia by biliary balloon dilator’s application after operation for hepatolithiasis combined with hemobilia, and whose clinical data were collected and analyzed. Results In 11 cases, 7 were males and 4 were females. Eight cases were transferred from other hospitals. When intrahepatic duct bleeding was stopped, the biliary balloon dilator was placed at the right site under the guide of choledochoscope. Hemobilia occurred in 4 patients and biliary balloon dilator was opened to compress for 2 h, then decompress for 0.5 h alternately. In all of 4 patients, bleeding was stopped successfully, of which, 1 patient got hemobilia again 5 d after the first bleeding, and was also stopped by the same method. Conclusions After operation on hepatolithiasis combined hemobilia, rebleeding happens in some cases. Preset of biliary balloon dilator at the prebleeding site and opening it when rebleeding happens can get instant hemostasis, which may be a simple and effective treatment choice.
ObjectiveTo analyze the factors influencing the occurrence of subclinical leaflet thrombosis (SLT) after percutaneous aortic valve replacement using balloon-expandable valve (Sapien3, S3). Methods Retrospective analysis was made on 62 patients with severe aortic stenosis undergoing percutaneous aortic valve replacement using S3 in our center from September 2020 to June 2022. Patients with a history of vascular atherosclerosis or with significant increase or insignificant decrease of aortic valve flow or gradient pressure during follow-up were selected for CT examination. Results A total of 26 patients were finally included, with an average age of 70.31±8.90 years, and the male proportion was higher (n=15, 57.69%). Among them, 5 patients had SLT. Compared with the non-SLT group, patients in the SLT group were older (68.52±8.80 years vs. 77.80±4.66 years, P=0.007). The age factor (≥75 years) and the diameter of the ascending aorta were associated with SLT (both P<0.05). Conclusion The incidence of SLT is higher in the elderly patients. It is speculated that SLT is related to the characteristics of short balloon dilation valves and low blood flow dynamics of valve racks.
Objective To systematically evaluate efficacy and safety of endoscopic pneumatic dilation and endoscopic stent placement in treatment of achalasia. Methods Eligible studies comparing the pneumatic dilation and the stent placement in treatment of achalasia were identified by an electronic search of MedLine, Embase, ISI Web of Science, the Cochrane Database, China Biology Medicine and Wanfang databases from inception to December 2015. Two reviewers independently screened the literatures, extracted data, and assessed the risk of bias of included studies. Then, RevMan 5.3 software was used for meta-analysis. Results A total of 4 randomized controlled trials including 343 patients with achalasia (176 cases in the pneumatic dilation group, 167 cases in the stent placement group) were subjected to the final analysis. The results of meta-analysis showed that the postoperative short term symptom relief rate had no significant difference between the pneumatic dilation group and the stent placement group 〔RR=1.03, 95%CI (0.95, 1.12),P=0.53〕, the postoperative 2-year symptom relief rate of the stent placement group was significantly higher than that of the pneumatic dilation group 〔RR=0.77, 95%CI (0.64, 0.92),P=0.005〕, but the complications rate of the stent placement group was significantly higher as compared with the pneumatic dilation group 〔RR=0.52, 95%CI (0.40, 0.69),P<0.000 01〕 too. Conclusions Although this meta-analysis has some shortcomings, preliminary results show that short term effects of pneumatic dilation and stent placement in treatment of achalasia are effective, long term effect of stent placement in treatment of achalasia is better as compared with pneumatic dilation, but it’s complications rate is higher. So in clinical diagnosis and treatment, effect, risk, patient’s physical condition, and demand should be considered together; during treatment, we should pay attention to adverse reactions and prepare adequately in order to reducing complications. When complications occur, we should take timely symptomatic treatment.
ObjectiveTo discuss outcomes of arch reintervention for post-repair recoarctation in children.MethodsFrom 2009 to 2019, 48 patients underwent reintervention for post-repair recoarctation in Shanghai Children’s Medical Center. Of the 48 patients, 22 patients had surgical repair, 25 patients had balloon angioplasty (BA), and 1 patient had a stent implantation. The clinical data were analyzed, and the difference in time-to-event distribution between the surgical group and the BA group was determined by a log-rank test.ResultsThe median age at reintervention was 15.0 months (range, 3.0 months-15.1 years). The median weight at reintervention was 9.8 kg (range, 3.0-58.0 kg). The time to reintervention after initial repair was 12.5 months (range, 2.0 months-7.8 years). One patient (2.1%) died in hospital and 1 patient (2.1%) experienced arrhythmia after surgical repair. One late mortality (2.1%) occurred after surgical reintervention. One patient (2.1%) experienced aortic dissection after BA. No patient died after BA. Freedom from residual coarctation or new recurrences was 66.7%, 61.3%, and 56.9%, respectively, at 1, 2, and 5 years after reintervention. Freedom from residual coarctation or new recurrences was 90.0%, 81.8%, and 70.1%, respectively, at 1, 2, and 5 years after surgical repair. Freedom from residual coarctation or new recurrences was 52.0%, 48.0%, and 48.0%, respectively, at 1, 2, and 5 years after BA. Compared with BA, surgery-based reintervention had a lower incidence of residual coarctation or recurrences (χ2=4.400, P=0.036).ConclusionReintervention for recoarctation has favorable early outcomes. Compared with balloon angioplasty, surgical repair has a more lasting effect in relieving the recoarctation.
ObjectiveTo evaluate the safety and efficiency of SilverHawk plaque excision in treatment of sympto-matic infrapopliteal arterial occlusive disease (IPAD). MethodsThe clinical and follow-up data of 54 consecutive patients with IPAD underwent endovascular treatment from 2011 to 2013 in this hospital were analyzed retrospectively. There were 29 males and 25 females. The age was (65.8±4.5) years, the period was (25.1±3.3) months. All the patients were Fontaine gradeⅡb-Ⅳ. The patients were divided into plaque excision group (n=9) and angioplasty group (n=45) according to the treatment method. The rates of technical success, perioperative complications, limb salvage and reintervention were observed between two groups. Results①There were no significant differences in the gender, age, complications, ankle brachial index (ABI), outflow tract score, lesion length, and other clinical data between the 2 groups (P > 0.05).②The technical success rate had no significant difference between the plaque excision group and the angioplasty group[100% (9/9) versus 86.7% (39/45), P=0.574]. Six cases were failed because the guide wire could not pass through the diseased segment in 4 cases and there were 2 cases of serious residual stenosis in the angioplasty group.③There was no significant difference in the incidence of vascular complications between the 2 groups[11.1% (1/9) versus 11.1% (5/45), P=1.000].④The follow-up results:One case was received the carotid endarterectomy on 4 months after operation because of severe carotid artery stenosis, the lower limbs had no new onset of symptoms in the plaque excision group. One patient due to myocardial infarction was death on 3 months after operation, 2 patients due to pulmonary infection and heart failure were death on 4 months and 5 months after operation respectively in the angioplasty group. The limb salvage rates and reintervention rates on 6 months and 12 months after operation had no significant differences between the 2 groups (P> 0.05). The ABI and ABI average improvement also had no significant significances between the 2 groups (P > 0.05). ConclusionPlaque excision is a safe and acceptable method to treat symptomatic IPAD, and its efficacy is better than angioplasty.
ObjectiveTo analyze the efficacy and safety of percutaneous balloon pulmonary valvuloplasty (PBPV) for pulmonary valve stenosis guided by ultrasound.MethodsFrom March 2016 to July 2019, 32 patients with pulmonary valve stenosis were treated in our hospital. There were 19 males and 13 females with an average age of 1-12 (6.2±3.1) years and weight of 7-45 (22.7±9.2) kg. The clinical efficacy of PBPV guided by transthoracic echocardiography (TTE) was evaluated.ResultsThe transvalvular pressure gradient (PG) of the patients before PBPV was 65.4±11.9 mm Hg. All patients successfully received PBPV under TTE guidance. The PG was 19.7±4.0 mm Hg immediately after operation, which was significantly decreased (P<0.001). All patients survived without any serious complications. The PG values at 3 months, 6 months and 12 months after operation were 18.4±4.0 mm Hg, 16.4±3.9 mm Hg, 15.2±3.3 mm Hg, respectively, which were significantly lower than that before the operation (P<0.001).ConclusionPBPV guided by echocardiography is safe and effective in the treatment of pulmonary valve stenosis with low complications rate.