Viral infection has always been a significant challenge to human health. Transplant recipients, including those who have undergone solid organ transplantation and allogeneic hematopoietic stem cell transplantation, are at high risk of viral infection due to their weak immune function under immunosuppressive therapy. Unlike the general population, transplant recipients are prone to pneumonia and even severe pneumonia after respiratory viral infection, which requires close attention from clinicians. Therefore, this article reviews the clinical characteristics and special management of viral infection in this population, focusing on the epidemiological features of common respiratory viral infection in transplant recipients, early diagnosis and intervention after infection, severe warning signs and drug treatment strategies, for the reference of clinical colleagues.

This article summarizes the new progress in the diagnosis and treatment strategies on drug-resistant cytomegalovirus(CMV)infections in organ transplant recipients, including the prevention and treatment medications for CMV infection, the diagnosis and treatment strategies, and the immunological treatment regimen for drug-resistant CMV infection.The article is aimed to provide references for the prevention and treatment of drug-resistant CMV infection in organ transplant recipients.

Background: and Purpose To examine the clinical and safety outcomes after endovascular treatment (EVT) for acute basilar artery occlusion (BAO) with different anesthetic modalities. Methods: This was a retrospective analysis using data from the Endovascular Treatment for Acute Basilar Artery Occlusion (ATTENTION) registry. Patients were divided into two groups defined by anesthetic modality performed during EVT: general anesthesia (GA) or non-general anesthesia (non-GA). The association between anesthetic management and clinical outcomes was evaluated in a propensity score matched (PSM) cohort and an inverse probability of treatment weighting (IPTW) cohort to adjust for imbalances between the two groups. Results: Our analytic sample included 1,672 patients from 48 centers. The anesthetic modality was GA in 769 (46.0%) and non-GA in 903 (54.0%) patients. In our primary analysis with the PSM-based cohort, non-GA was comparable to GA concerning the primary outcome (adjusted common odds ratio [acOR], 1.01; 95% confidence interval [CI], 0.82 to 1.25; P=0.91). Mortality at 90 days was 38.4% in the GA group and 35.8% in the non-GA group (adjusted risk ratio, 0.95; 95% CI, 0.83 to 1.08; P=0.44). In our secondary analysis with the IPTW-based cohort, the anesthetic modality was significantly associated with the distribution of modified Rankin Scale at 90 days (acOR: 1.45 [95% CI: 1.20 to 1.75]). Conclusion In this nationally-representative observational study, acute ischemic stroke patients due to BAO undergoing EVT without GA had similar clinical and safety outcomes compared with patients treated with GA. These findings provide the basis for large-scale randomized controlled trials to test whether anesthetic management provides meaningful clinical effects for patients undergoing EVT.

Objective:To investigate the influencing factors for prognoses of patients with acute basilar artery occlusion (BAO) receiving bridging therapy (intravenous thrombolysis [IVT] combined with endovascular treatment [EVT]).Methods:The clinical and imaging data of 404 patients with acute BAO accepted bridging therapy were collected from Endovascular Treatment for acute Basilar Artery Occlusion (ATTENTION) database. The prognoses of these patients were evaluated by modified Rankin Scale (mRS) 90 d after treatment. The differences of clinical and imaging data between patients with good prognosis and poor prognosis were compared, and the independent influencing factors for prognoses were analyzed by multivariate Logistic regression.Results:Among 404 patients with acute BAO, 156 (39%) had good prognosis and 248 (61%) had poor prognosis. Compared with the good prognosis group, the poor prognosis group had significantly higher proportions of patients older than 65 years, patients with NIHSS scores>20 on admission, and patients with thrombectomy frequency>1, significantly lower proportion of patients with successful vascular recanalization, and significantly different distribution of occlusive sites ( P<0.05). Multivariate Logistic regression analysis showed that NIHSS scores on admission>20 ( OR=0.510, 95%CI: 0.331-0.786, P=0.002), and occlusion site at the distal basilar artery ( OR=2.241, 95%CI: 1.357-3.702, P=0.002), thrombectomy frequency>1 ( OR=0.523, 95%CI: 0.339-0.807, P=0.003) and successful vascular recanalization ( OR=2.022, 95%CI: 1.032-3.961, P=0.040) were independent influencing factors for good prognosis of these patients. Conclusion:Acute BAO patients with NIHSS scores>20 on admission, thrombectomy frequency>1, non-distal BAO occlusion, and unsuccessful recanalization have poor prognosis after bridging therapy.

Objective    To investigate the technique and efficacy of left atrial appendage (LAA) occlusion during off-pump coronary artery bypass grafting (OPCABG) in elderly patients with coronary artery disease (CAD) and atrial fibrillation (AF). Methods    From 2013 to 2018, 84 elderly patients with CAD and AF with reduced left ventricular ejection fraction (LVEF< 50%) underwent OPCABG in our department. There were 54 males and 30 females at age of 70-82 years. They were divided into a left atrial appendage (LAA) occlusion group (n=56) and a non-LAA occlusion group (n=28). Postoperative antithrombotic therapy: the LAA occlusion group was given warfarin + aspirin + clopidogrel “triple antithrombotic therapy” for 3 months after operation, then was changed to aspirin + clopidogrel “dual antiplatelet” for long-term antithrombotic; the non-LAA occlusion group was given warfarin + aspirin + clopidogrel “triple antithrombotic” for long-term antithrombotic after operation. The clinical effectiveness of the two groups was compared. Results    All patients underwent the surgery successfully. There were 56 patients in the LAA occlusion group, including 44 patients of LAA exclusion and 12 patients of LAA clip. The time of LAA occlusion was 3 to 8 minutes. There was no injury of graft vessels and anastomotic stoma. Early postoperative death occurred in 2 patients (2.4%). There was no statistical difference between the two groups in postoperative hospital stay (P=0.115). Postoperative LVEF of the two groups significantly improved compared with that before operation (P<0.05). There was no stroke or bleeding in important organs during hospitalization. During follow-up of 1 year, no cerebral infarction occurred in both groups, but the incidence of bleeding related complications in the LAA occlusion group was significantly lower than that in the non-LAA occlusion group (3.6% vs. 18.5%, P=0.036). Conclusion    For elderly patients with CAD and AF with reduced LVEF, LAA occlusion during OPCABG can effectively reduce the risk of stroke and bleeding related complications, and without increasing the risk of surgery.

Objective    To summarize the application and clinical effect of left anterior minimally invasive thoracotomy to surgical repair of subarterial ventricular septal defect (VSD) in children. Methods    From October 2015 to April 2019, 21 children with subarterial VSD underwent surgical repair via left anterior minimally invasive thoracotomy. There were 13 males and 8 females, aged 5-13 (9.1±2.2) years, and weighing 22-55 (35.6±9.5) kg. The diameter of subarterial VSD was 4-15 (9.1±3.3) mm. Eight patients had right coronary valve prolapse, and 4 aortic valve regurgitation (3 mild and 1 mild-to-moderate). The minimally invasive surgery was performed via left parasternal thoracotomy through the second or third intercostal space. The peripheral perfusion was performed with femoral arterial and venous cannulation. After aortic cross-clamp (ACC), subarterial VSD was performed with direct suture of patch closure through an incision on the root of pulmonary artery. Results    All patients successfully underwent surgical repair (patch closure, n=15; direct suture, n=6) of subarterial VSD through left anterior minimally invasive thoracotomy. The cardiopulmonary bypass time was 45-68 (57.1±6.3) min. The ACC time was 23-40 (32.6±4.7) min. The postoperative ventilation time was 5-9 (6.3±1.3) h, postoperative in-hospital time was 5-8 (5.7±1.0) d and drainage volume was 33-105 (57.5±17.7) mL in postoperative 24 h. No death, residual VSD shunt, atrioventricular block, wound infection or thoracic deformity occurred during the perioperation or follow-up. Only one patient still had trivial aortic valve regurgitation. Conclusion    Left anterior minimally invasive thoracotomy could be safely and effectively applied to surgical repair of subarterial VSD in children, with satisfactory early- and mid-term outcomes.

Objective: To summarize the safety and effect of modified surgery for hypertrophic obstructive cardiomyopathy(HOCM) with concomitantly significant mitral regurgitation(MR) through a single transaortic approach. Methods: From January 2008 to June 2018, 93 patients with HOCM and significant MR underwent modified Morrow procedure and edge-to-edge mitral valvuloplasty through a single transaortic approach. Preoperative left ventricular outflow tract pressure gradient(LVOTPG) was 51-199 mmHg(1 mmHg=0.133 kPa). Preoperative interventricular septum thickness(IVST) was 17-30 mm. All patients had significant MR with SAM phenomenon. The modified Morrow procedure and edge-to-edge mitral valvuloplasty through a single transaortic approach was performed under cardiopulmonary bypass and aortic crossclamp. Results: All patients successfully underwent the surgery of modified Morrow procedure and edge-to-edge mitral valvuloplasty through a single transaortic approach. No early death and interventricular septal perforation were occurred. In the early postoperative period, two patient(2.15%) received permanent pacemaker implantation due to the complete atrial-ventricular block. At discharge, postoperative LVOTPG(7-31 mmHg) and IVST(11-19 mm) were significantly decreased compared with the preoperative values(P<0.05). All patients had none or trivial MR. The mitral valve pressure gradient(MVPG) was 0-6 mmHg. SAM phenomenon disappeared in all patients. At a mean follow-up of(40.53±27.11) months, no patient had significant residual left ventricular outflow tract obstruction. All patients had none or trivial MR. No SAM phenomenon occurred. Conclusion Modified surgery of Morrow procedure and edge-to-edge mitral valvuloplasty through a single transaortic approach could be safely and effectively applied for patients with HOCM and concomitantly significant MR.

Objective     To explore the technique of performing minimally invasive Cox Maze Ⅳ procedure by bipolar clamp through right lateral minithoracotomy for atrial septal defect (ASD) combined with atrial fibrillation (AF) in adults. Methods     Thirty-five patients (21 males, 14 females with age ranging from 45 to 73 years) with ASD and persistent or long-standing persistent AF received minimally invasive Cox Maze Ⅳ procedure and ASD closure from August 2012 to April 2016 at Department of Cardiothoracic Surgery, Xinhua Hospital. Diameter of left atrium ranged from 39 to 60 mm and left ventricle ejection fraction (LVEF) ranged from 48% to 62%. Diameter of ASD ranged from 20 to 35 mm. Cox-maze Ⅳ procedure was performed through right minithoracotomy entirely by bipolar radiofrequency clamp. Then, mitral or tricuspid valvuloplasty and surgical ASD closure was performed through right minithoracotomy.   Results     All patients successfully underwent this minimally invasive surgery. No patient needed conversion to sternotomy. The mean cardiopulmonary bypass time was 120.1±14.1 min. The mean aortic cross-clamp time was 79.5±12.2 min. There was no early death or pacemaker implantation perioperatively. The average length of hospital stay was 10.1±2.7 d. At a mean follow-up of 22.8±12.2 months, sinus rhythm was restored in 32 patients (32/35, 91.4%). Cumulative maintenance of normal sinus rhythm without AF recurrence at 2 years postoperatively was 89.1%±6.0%. Conclusion     The minimally invasive Cox Maze Ⅳprocedure performed by bipolar clamp through right minithoracotomy is safe, feasible, and effective for adult patients with ASD combined with AF.

Objective To evaluate the outcomes achieved by using left internal mammary artery(LIMA) to radial artery (RA) total arterial composite grafts in minimally invasive direct coronary artery bypass grafting (MIDCAB) for patients with multiple vessel disease.Methods From January 2009 to September 2015, 39 patients(24 males) with multiple vessel disease underwent MIDCAB with LIMA-RA total arterial composite grafts without cardiopulmonary bypass in our hospital .MIDCAB was performed through a left anterior minithoracotomy .Results All patients successfully underwent MIDCAB with LIMA-RA total arterial composite grafts.No patient required to convert to strenotomy during the surgery.Mean operation time was(176.1 ± 14.1)min.Revascularization was performed for 2 target vessels in 11 cases, 3 target vessels in 25 cases and 4 target vessels in 3 cases.Mean postoperative ventilation time was(21.9 ±27.9) h.Mean ICU time was(2.8 ±2.1) days, and mean postoper-ative inhosptial time was(11.2 ±3.3)days.There was no early death in perioperation.At a follow-up of 6 to 86 months[aver-age(27.5 ±18.0) months], one patient died.The overall survival at 2 years postoperatively was(96.0 ±3.9)%.The paten-cy rate of LIMA was 100%.The overall patency rate of RA grafts at 2 years postoperatively was(91.8 ±4.0)%.Conclusion MIDCAB with LIMA-RA total arterial composite grafts is a safe and effective procedure with favorable early and mid-term out-comes for patients with multiple vessel disease .

Objective To report the results of lung transplantation using graft lungs from donation after citizens death.Methods The clinical data of lung transplantation between January 2016 and June 2016 were analyzed retrospectively.Results Totally 20 patients with end stage lung diseases underwent lung transplantation.Of the 20 patients,11 cases (55％) underwent single lung transplantation and 9 cases (45 ％) underwent bilateral lung transplantation.The top two diseases for lung transplantation were pulmonary fibrosis in 11 cases (55％) and emphysema in 6 cases (30％).Four cases (20％) were given intraoperative ECMO support.Median duration of postoperative intubation was 2 days:1 day for single lung transplantation and 4 days for bilateral lung transplantation,respectively.Acute rejections were diagnosed in 9 patients (45％) who were successfully treated with high-dose intravenous methylprednisolone or methylprednisolone combined with anti-human thymocyte globulin.Postoperative pneumonia episodes occurred in 16 cases (80％)and 4 of them were associated fungal pneumonia.Preoperative sputum culture showed positive bacteria in 16 donors (80％) and 17 kinds of strains were identified.Postoperative sputum culture showed positive bacteria in 19 recipients and 4 of them had the same strains as compared with the corresponding donors.One recipient died of primary graft dysfunction in early term (＜ 1 month)postoperatively,two recipients abandoned treatments and died in 1 week after the discharge,and the remaining 17 cases successfully recovered.Median hospital duration was 55 days:35 days for single lung transplantation and 67 days for bilateral lung transplantation,respectively.Conclusion LLung transplantation is an effective treatment for end-stage lung diseases.Carefully selecting donors,well protecting graft lung and proper peri-operative treatment are the key steps leading to successful lung transplantation using grafts from organ procurement organization.