title: [Application of cryoablation in  minimally invasive mitral valve surgery].
abstract: OBJECTIVE
  To summarize the clinical data of patients who experienced cryoablation in minimally invasive mitral valve surgery and to explore safety and effectiveness of the surgery.
  
  
  METHODS
  We retrospectively collected the clinical data of patients who experienced cryoablation in minimally invasive mitral valve surgery in Department of Cardiovascular of Second Xiangya Hospital from August 2013 to July 2015. Through a right side (4-6 cm) thoracotomy, femoral cannulation and aortic cross-clamp by Chitwood clamper was performed, left atrium was entered from interatrial groove. Modified left and right side cryomaze followed by valve surgery was finished. The left atrial appendage was excluded by oversewing from endocardial surface. The cardiopulmonary bypass time, cross-clamp time, duration in hospital were recorded. The heart rhythm of 3 consecutive post operation days, at 7th day, 3 months, 6 months, 12 months or 18 months after the surgery was monitered by 12-leads electrical cardiogram.
  
  
  RESULTS
  No death was observed in this group. Reexploration for bleeding was conducted for one case. Operation time, CBP time and cross-clamp time was (197.4±27.2), (103.6±20.3)and (65.3±15.7) min, respectively. Duration in ICU and hospital was (1.2±0.4) and (9.2±1.6) d, respectively. The ratio of sinus rhythm restoration right after surgery was 97.1%. The ratio of sinus rhythm restoration at the time of hospital discharge was 94.3%. No motality was found in follow-up. The ratio of sinus rhythm restoration at 3, 6, 12,18 months after the surgery was 94.3%, 93.5%, 90.5%, 93.3%, respectively.
  
  
  CONCLUSIONS
  Right minimal invasive thoracoscopic-assisted cryoablation in mitral valve surgery is quite effective in the treatment of atrial fibrillation, displaying the advantages of less complications, motality and hospitalization.
authors.affiliation: Department of Cardiovascular Surgery, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: Xiaobing
authors.initials: X
authors.lastname: Li
authors.affiliation: Department of Cardiovascular Surgery, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: Limimg
authors.initials: L
authors.lastname: Liu
authors.affiliation: Department of Cardiovascular Surgery, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: Long
authors.initials: L
authors.lastname: Song
authors.affiliation: Department of Cardiovascular Surgery, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Luo
authors.affiliation: Department of Cardiovascular Surgery, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: Benli
authors.initials: B
authors.lastname: Yang
authors.affiliation: Department of Cardiovascular Surgery, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: Yuhong
authors.initials: Y
authors.lastname: Liu
mesh_terms: D001011:Aorta; D001281:Atrial Fibrillation; D006348:Cardiac Surgical Procedures; D003452:Cryosurgery; D006325:Heart Atria; D006801:Humans; D019060:Minimally Invasive Surgical Procedures; D008943:Mitral Valve; D012189:Retrospective Studies; D013525:Surgical Instruments; D013908:Thoracotomy