Effect of the valved stent on closure of patent ductus arteriosus in a miniswine model / 中华心血管病杂志

<p><b>OBJECTIVE</b>To evaluate the feasibility of a valved stent on closure patent ductus arteriosus in a Chinese miniswine model.</p><p><b>METHODS</b>Self-expandable nitinol stents were made of Ni-Ti shape memory alloy (9 mm in diameter). Bovine pericardium was shaped and sutured onto the stents. Fluid passing test, pre-releasing test and static test of pressure in tube were performed in all devices before use. In eight Chinese miniswine, vascular grafts (PTFE vascular prosthesis) were surgically inserted between the descending thoracic aorta and pulmonary artery for establishment of patent ductus arteriosus model. Valved stents were deployed to occlude the patent ductus arteriosus. Echocardiography was performed two hours post operation. Aortic angiography was made 30 days post operation in survived animals. Animals were then sacrificed for autopsy and electron microscopy examinations.</p><p><b>RESULTS</b>In vitro testing showed that the closure of the valved stent leaflets was satisfactory and fluid flows were not restricted in the opposite direction. The valved stents could be released through catheter, expanded completely, rapidly fixed in the tube. Closure of patent ductus arteriosus was succeeded in 6 out of 8 animals. One animal died of respiratory failure 2 hours post operation, another one died of pulmonary embolism due to valved stent displacement. Resident shunt was not evidenced by echocardiography, aortic angiography and dissection examinations in the remaining 6 animals. The new endothelial tissue fully covered the pulmonary and aortic sides of patent ductus arteriosus in 4 and 3 animals respectively. The electron microscopic observation revealed endothelial coverage of dives.</p><p><b>CONCLUSION</b>The valved stent could effectively close artificial patent ductus arteriosus in vivo with satisfactory new intima covering on both sides of patent ductus arteriosus.</p>

Changes of interleukin-1beta and tumor necrosis factor-alpha of right atrial appendages in patients with rheumatic valvular disease complicated with chronic atrial fibrillation / 中华心血管病杂志

<p><b>OBJECTIVE</b>To investigate whether atrial expression of interleukin-1beta (IL-1beta) and tumor necrosis factor-alpha (TNF-alpha) of right atrial appendages are altered in patients with rheumatic valvular disease during chronic atrial fibrillation.</p><p><b>METHODS</b>A total of 48 patients with rheumatic heart disease were included. 27 patients had no history of atrial fibrillation, 21 patients had atrial fibrillation. Atrial tissue was obtained from the right atrial appendage during open heart surgery. The protein expression of IL-1beta and TNF-alpha was detected by immunohistochemistry method. The fibrosis of right atrial appendage was detected by Masson staining.</p><p><b>RESULTS</b>The fibrosis of right atrial appendage was significantly increased in patients with chronic atrial fibrillation. The protein expression of IL-1beta and TNF-alpha were significantly increased in patients with chronic atrial fibrillation.</p><p><b>CONCLUSIONS</b>The protein expression of IL-1beta and TNF-alpha were significantly increased in patients with rheumatic valvular disease during chronic atrial fibrillation. Inflammation may be one of the mechanisms for the development and persistence of atrial fibrillation.</p>

Changes of serum cytokeratin 19 fragment in postoperative patients with non-small cell lung cancer / 中华全科医师杂志

Objective To study the clinical value of serum cytokeratin 19 fragment (CYFRA21-1) as a biomarker in evaluating its prognosis,monitoring and follow-up of the postoperative patients with non- small cell lung cancer (NSCLC).Methods Serum CYFRA21-1 was determined by radioimmunoassay for 207 patients with NSCLC before and after surgical operation at Tongji Hospital,Shanghai.Relationship between serum CYFRA21-1 and the prognosis,recurrence and metastasis of lung cancer was analyzed retrospectively.Results The patients were followed-up for 37 months in average.Preoperative serum CYFRA21-1 was positive in 42.0% (87/207) of all the cases,48.8% (60/123) of squamous cell earcinama and 34.6% (27/78) of adenocarcinoma,with statistical significance (X~2=3.901,P

A study on quality of life in patients with coronary artery bypass grafting surgery / 中华胸心血管外科杂志

Objective To assess the perioperative change in Quality of Life(QoL)in patients who underwent CABG surgery. Methods The Chinese version of the SF-36 and SAQ were sent to participants at baseline and three and six months after CABG sur- gery.Results Angina stability score,one of the five SAQ domains,was lowest and postoperative SAQ domains scores were with sig- nificant improvement from baseline.Many of the dimensions of the SF-36 in postoperative patients were better than baseline.The SF- 36 was also used to evaluate in groups ONCAB and OPCAB,but no difference of the SF-36 subscale scores between the two groups was observed.Conclusion SAQ domains scores were significantly improved in three months and increased further in six months.Many of the dimensions of the SF-36 in postoperative patients were improved than baseline.No difference of the SF-36 subscale scores between the groups of ONCAB and OPCAB was observed postoperatively.