ASIAN CARDIOVASCULAR & THORACIC ANNALS最新文献

Aiming at encouraging young talents to become dedicated surgeon-scientists in the field of thoracic and cardiovascular surgery, an "Oriental Rising Star Award" was established at the 32nd annual meeting of the Asian Society for Cardiovascular and Thoracic Surgery ("ASCVTS 2024") which was held in Wuhan, China, on May 23-26, 2024. The winner of the First Prize was Dr. Yuanjia Zhu from Stanford University, USA. Following the conclusion of the "ASCVTS 2024," Professor Song Wan, Chairman of the Scientific Committee of the "ASCVTS 2024," conducted an interview with Dr. Zhu. Their conversation is presented below.

BackgroundThe extent of anastomotic stenosis after sleeve lobectomy (SL) remains unclear, and there are limited reports on postoperative pulmonary function. This study aimed to compare postoperative pulmonary function between SL and standard lobectomy (STL) and to evaluate anastomotic stenosis in SL.MethodsThis study included 44 SL patients and 825 STL patients from 2012 to 2023. Post- or preoperative forced expiratory volume in 1 s (FEV1.0) values (FEV1.0 preservation rate) were analyzed and compared between the SL and STL groups. The lobe expanded rate values, calculated using volumes of the lung lobe(s) distal to the bronchial anastomosis in the SL group and the corresponding lobe(s) in the STL group, measured using three-dimensional computed tomography (3D-CT), were analyzed and compared. In the SL group, the surface area of the lumen at the site corresponding to the bronchial anastomosis was measured on 3D-CT, and the postoperative/preoperative value (bronchus stenosis rate) was calculated.ResultsThe SL and STL groups significantly differed in terms of the FEV1.0 preservation rate (84.6% vs. 87.7%, p = 0.180); however, the lobe expanded rate was significantly lower in the SL group (119.1% vs. 134.6% p = 0.009). The average bronchus stenosis rate was 64.3%, with no significant difference between wedge and circumferential bronchial resection groups (63.4% vs. 66.4%, p = 0.730).ConclusionThe volume of the lung lobe(s) distal to the bronchial anastomosis after SL was lower than that after STL. However, this did not affect postoperative pulmonary function. The type of bronchoplasty did not influence the development of anastomotic stenosis.

Objective: There is little evidence regarding the most beneficial choice between a mechanical and a bioprosthetic valve in the aortic position in dialysis patients. This meta-analysis compares the survival and freedom from reintervention rates between mechanical and bioprosthetic valves in patients on dialysis undergoing aortic valve replacement surgery.

Methods: Two databases were searched, and the systematic review was performed in accordance with the recommendations of the Preferred Reporting Items for Systematic Reviews and Meta-analyses statement. We conducted one-stage and two-stage meta-analysis with Kaplan-Meier-derived individual patient data and meta-analysis with random-effects model.

Results: Eight studies were included, providing data about 1215 dialysis patients receiving mechanical valves and 1851 patients receiving bioprosthetic valves. During a mean follow-up of 43.1 months, overall survival rates were significantly improved in the mechanical valve group in comparison to the bioprosthetic one (hazard ratio [HR]: 0.76, 95% confidence interval [CI]: 0.69-0.84, p < 0.001). This was confirmed by the two-stage meta-analysis (HR: 0.72, 95% CI: 0.62-0.83, p = 0.00, I² = 17.79%). Regarding freedom from reintervention, no arm offered a statistically significant advantage, according to the two-stage generated analysis (HR: 1.025, 95% CI: 0.65-1.61, p = 0.914). Similarly, there was no evident superiority of a valve type for perioperative outcomes.

Conclusions: Mechanical valves are likely to be associated with a better survival outcome compared to bioprosthetic valves for patients on dialysis undergoing aortic valve replacement. However, freedom from reoperation rates and perioperative outcomes were comparable between the two valve types, with no arm exhibiting a statistically significant advantage.

Case report: A six-year-old child who had undergone cardiac surgery five years ago presented to us with severe mitral valve regurgitation. During her current surgery, the coronary artery was injured during the attempt to release extensive epicardial adhesion, resulting in very poor contractility that prompted a delay in the intended valve repair. The injured coronary vessels were successfully repaired, yet low cardiac output syndrome persisted during perioperative care, necessitating further investigation of the coronary problem. It was later discovered that the patient had anomalous left coronary artery from pulmonary artery (ALCAPA) syndrome.

Discussion: The presence of severe mitral regurgitation, pulmonary hypertension, and anatomical factors may have contributed to the delayed presentation and diagnosis in this case. The severity of mitral regurgitation and the most likely underlying mechanism indicates a low possibility of recovery following coronary repair alone, warranting the need for concomitant mitral surgery. Coronary and mitral repair were performed in this patient, resulting in a favorable outcome.

Conclusions: The management of ALCAPA presents unique challenges, especially in cases with delayed diagnosis. Proper diagnosis and tailored surgical approaches are crucial for achieving favorable outcomes in patients with ALCAPA.

We report a rare case of an infracardiac-type total anomalous pulmonary venous connection with nonconfluent bilateral pulmonary veins in a patient diagnosed with heterotaxy syndrome with right atrial isomerism, mitral valve atresia, a single atrium, and double-outlet right ventricle. On the fourth day of life, the patient underwent successful repair using a sutureless technique. Two years after the surgery, the patient remained well without any signs of pulmonary venous obstruction.

Background: Recommendations for cardiac surgery advocate for antibiotic prophylaxis for up to 48 hour after surgery. However, recent reports found a significant reduction in surgical site infection with extended duration. We evaluated the effect of the type of prophylactic antibiotics and administration durations on the postoperative surgical site infection rate following cardiac surgery in adults.

Methods: An investigator-initiated randomized controlled trial was conducted from 2018 to 2022 on adult patients undergoing cardiac surgery. Patients were randomized into four groups based on antibiotic treatment type and duration: 24 h cefazolin, 24 h cefuroxime, 48 h cefazolin, and 48 h cefuroxime. The primary outcome was the rate of surgical site infections within 90 days of surgery.

Results: A total of 568 patients were included in this study. The four groups had similar baseline characteristics, including age, sex, EuroSCORE II, and baseline HbA1c. A total of 75 patients developed infection within 90 days postoperative. The overall infection rate was not statistically different across the four groups (p = 0.193). The efficacy of cefazolin and cefuroxime in reducing infection was comparable (p = 0.901). Extended prophylaxis was associated with a significantly reduced overall infection rate within 90 days postoperatively compared to 24-h prophylaxis (10.2% vs. 16.3%; risk ratio = 0.62, 95% confidence interval: 0.40-0.96, p = 0.032).

Conclusion: Using cefazolin or cefuroxime for 48 h instead of 24 h was more effective in reducing the overall surgical site infections rate up to 90 days after surgery.

Introduction: Neurological complications pose significant risks in coronary artery bypass grafting (CABG). This study explores the potential benefits of preoperative chest computed tomography (CT) in optimizing outcomes and reducing neurological events in high-risk CABG patients.

Methods: From January 2017 to June 2023, a retrospective cohort study of CABG patients categorized groups based on preoperative chest CT use. Multivariate analysis evaluated the associations between CT imaging and patient characteristics, followed by propensity match analysis to balance preoperative features across groups.

Results: The study included 1786 patients, with 435 having undergone preoperative CT and 1351 without. Propensity matching created two well-balanced groups of 413 patients each. At multivariate analysis, CT patients were elderly (71.1 ± 8.9 years; p = 0.03) with a higher incidence of pulmonary disease (19.5%; p < 0.01), peripheral arterial disease (29.2%; p < 0.01), and previous cerebrovascular disease (23.4%; p = 0.02). In the matched CT cohort, the perioperative cerebral stroke rate was 0.7% (vs. 1.9% in without preoperative CT [WCT] cohort; p = 0.223), and the 30-day mortality rate was 0.2% (vs. 1.7% in WCT cohort; p = 0.069). Patients who had a preoperative CT study presented a higher prevalence of porcelain aorta (6.3% vs. 1.5%; p = 0.0003) and required more often a no-touch aorta procedure (20.3% vs. 14.5%; p = 0.035).

Conclusions: Patients undergoing preoperative chest CT before CABG were typically older and had systemic atherosclerosis and pulmonary disease. Propensity-matched analysis indicated low mortality and perioperative cerebral stroke rates in these high-risk patients. These findings support the integration of chest CT into preoperative evaluations for high-risk patients to develop tailored strategies in coronary artery bypass surgery.

Redo coronary artery bypass grafting after an in-situ right internal thoracic artery graft to the left anterior descending artery is challenging. For such a 52-year-old male patient with a history of mediastinitis, we performed redo bypass grafting of the right coronary artery using a saphenous vein graft and xiphoid resection via the suprasternal route with the left axillary artery as the inflow source and the graft were patent. The axillary artery is an inflow source for patients with inaccessible aorta. Combining the suprasternal route with a xiphoid resection provides a bail-out option.

Background: Fenestrated total cavopulmonary connection has gained popularity due to its capacity to reduce systemic venous pressure and enhance cardiac output. However, there is ongoing debate about the immediate and long-term advantages of fenestration in this context.

Method: A retrospective cohort study was conducted involving 97 patients who underwent extracardiac total cavopulmonary connection at Chiang Mai University Hospital between January 1999 and December 2019. The patients were initially categorized into two groups: fenestrated (n = 71) and nonfenestrated (n = 26). After exclusion and reassignment, the long-term outcomes were analyzed for the fenestrated (n = 68) and nonfenestrated (n = 25) groups. To address potential confounding factors between the two groups, propensity scores were computed using logistic regression analysis.

Results: The study found no significant differences in preoperative and operative data. Immediate postoperative outcomes showed no significant variations in major complications, intensive care unit stay, oxygen saturation, and posttotal cavopulmonary connection pressure. In the long-term assessment, the fenestrated group demonstrated significantly lower rates of mortality, protein-losing enteropathy, liver mass, and cirrhosis. However, after employing a multilevel model stratified by propensity score analysis, only long-term mortality rate was significantly lower in the fenestrated group (hazard ratio = 0.12, 95% confidence interval = 0.02-0.97). Fenestration patency closed gradually through spontaneous closure and device intervention.

Conclusion: The study found no major differences in immediate postoperative outcomes. In the fenestrated cohort, significantly lower incidences of protein-losing enteropathy, liver mass, cirrhosis, and long-term mortality were observed. However, multilevel model stratified by propensity score analysis indicated that only the lower long-term mortality demonstrated a major effect.