ABSTRACT
Objective: To explore the safety and efficacy of two modeling methods of CARTO3 system for radiofrequency catheter ablation (RFCA) in paroxysmal atrial fibrillation (PAF) patients. Methods: A total of 150 PAF patients with RFCA were randomly divided into 3 groups: Group A: using conventional point-to-point mapping to guide circumferential pulmonary vein isolation; Group B, using fast anatomical modeling to guide circumferential pulmonary vein RFCA; Group C, using combined application of 2 mapping methods to guide circumferential pulmonary vein RFCA. n=50 in each group and the rest operative procedures were the same in 3 groups. The operative time, X-ray exposure time, success rate and complication rates were recorded in 3 groups; the size of left atrium and systolic function of left ventricle at pre- and 6 months post-operation were compared. Results: Compared with Group A and Group B, Group C had the shorter operative time and X-ray exposure time, P<0.05;the success rates were similar among 3 groups. No serious complication occurred in all 3 groups. Echocardiography presented that compared with pre-operative condition, the size of left atrium and LVEF were similar at 6 months post-operation. Conclusion: Combined using of two modeling methods of CARTO3 system was safe and effective for RFCA in PAF patients; it may reduce the operative time and X-ray exposure time, improve the accuracy of circumferential pulmonary vein locating and help guiding RFCA of PAF at certain degree.
ABSTRACT
<p><b>OBJECTIVE</b>To prospectively evaluate the safety and efficacy of nickel- titanium temperature-dependent memory-shape device(CAR27) for colorectal anastomosis.</p><p><b>METHODS</b>Sixty colorectal cancer patients were randomly divided into two groups and received colorectal anastomosis with CAR27 or traditional stapling device. Complications, bowel function return, and the extrusion of anastomosis ring were prospectively monitored.</p><p><b>RESULTS</b>Both CAR27 and stapler group had one case of anastomotic leakage. Other complications such as stricture or obstruction were not found. Time for anastomosis of the two groups were (10.1±1.2) minutes and (11.2±2.1) minutes respectively. Time to first flatus was(3.2±1.2) days and (3.5±1.4) days respectively. Time to food intake resumption was (4.0±1.4) days and (4.3±1.3) days respectively. The differences above between the two groups were not statistically significant(P>0.05). The ring was expelled with stool within 7-16 days. The two groups were similar in operative time and the return of bowel function.</p><p><b>CONCLUSION</b>CAR27 is safe and simple for colorectal anastomosis.</p>