RESUMO
BACKGROUND: Patients with mitral valve disease have a higher incidence of atrial fibrillation after mitral valve replacement and mitral annuloplasty. Maze surgery is the gold standard for surgical treatment of atrial fibrillation. The effect of artificial valve and valve ring on maze surgery is not clear. OBJECTIVE: To evaluate the changes of sinus rhythm-left atrial contractive function after surgical maze ablation of valvular atrial fibrillation and whether valve replacement or valve ring implantation affects the recovery of sinus rhythm-left atrial contractive function. METHODS: From October 2013 to October 2017, 324 patients who underwent surgical maze ablation due to mitral valve lesions associated with persistent or long-term persistent atrial fibrillation in the General Hospital of Northern Theater Command were enrolled. All patients were treated with artificial valve replacement or artificial valve ring implantation after maze operation. The patients were followed up by electrocardiogram and echocardiography at discharge and 1, 3, 6, 12 and 24 months after procedure. A multivariate Cox analysis of predictive factors for left atrial contractive function recuperation was applied. This study was approved by the Medical Ethics Committee of General Hospital of Northern Theater Command (original General Hospital of Shenyang Military Region of Chinese PLA). RESULTS AND CONCLUSION: (1) Two patients (0.6%) died during the perioperative period, and the remaining 322 patients were followed up for 2 years. There were no adverse events related to artificial materials during the follow-up. (2) The recovery rate of left atrial contractive function increased gradually after procedure. The coexistence consistency of left atrial contractive function and sinus rhythm was good until 1 year after surgery (Kappa coefficient = 0.75, P 3 months) after surgical maze ablation (all P values 0.05). (4) ROC curve analysis showed that the optimal critical value of preoperative atrial fibrillation time and preoperative left atrial diameter for prediction of left arterial contractive function recovery was 36.5 months (sensitivity 90.5%, specificity 93.7%) and 60.5 mm (sensitivity 93.8%, specificity 85.0%) respectively. (5) These results suggest that the recovery of left atrial contractive function after surgical maze ablation is a dynamic improvement process. Early recovery of left atrial contractive function is beneficial to maintaining stable sinus rhythm in the future. Prolonged duration of atrial fibrillation, enlarged left atrial diameter, and cryoablation mode may have adverse effects on surgical maze ablation. Valve ring implantation or valvular replacement does not affect the efficacy of surgical maze ablation.
RESUMO
Objective To investigate the application of Haiao prosthodontics membrane in the repair of palatal fistula. Methods According to personal preference, 32 patients with palatal fistula were randomly divided into the experimental group (n=15 cases) and the control group (n=17 cases) . In the experimental group, the flap of the surrounding tissue of fistula was used as nasal layer and Haiao prosthodontics membrane was used as the oral layer for the repair of palatal fistula.In the control group, the flap of the same tissue was used as nasal layer and the flap of the ortho tissue was used as the oral layer to repair the palatal fistula. Several indexes were evaluated including the blood loss,operation time, hospitalization time, postoperative fever, postoperative complications and hospitalization expenses. Results Less blood loss, shorter operation time and shorter hospital stay were observed in the experimental group compared with the control group (P＜0.05) . The incidence of fever after operation, the temperature and the duration of the fever were significantly lower in the experimental group (P＜0.05) . The incidence of bleeding complications after operation in the experimental group were significantly lower compared with that in the control group (P＜0.05) . No significant difference of the refissure rate and hospitalization expenses was found between the two groups (P＞0.05) .Conclusion Haiao prosthodontics membrane can be used to repair some palatal fistula. Advantages include safety, reliability, mild postoperative reaction and quick recovery.