Introduction: Postoperative atrial fibrillation is the most common arrhythmia following bypass surgery with significant morbidity, mortality and increased healthcare costs. The aim of this study is to determine the incidence and timing of atrial fibrillation, identify the risk factors covering preoperative and intraoperative periods, evaluate rate of return to sinus rhythm by disharge, and explore the impact on postoperative outcomes in a large group of patients operated in a single center by a single surgeon. Patients and Methods: Between January 2011 and January 2012, 418 patients on preoperative sinus rhythm were operated for ischemic heart disease and associated complications (left ventricle aneurysm repair and ischemic mitral insufficiency) in a single center, by a single surgeon. The preoperative, intraoperative and postoperative variables were studied. Results: The mean age of the patients were 61.92 ± 10.05, and 77.5% were male. Atrial fibrillation developed in 68 (16.3%) patients. The incidence peaked at second day. Patients with atrial fibrillation were older (p< 0.001). Gender, preoperative comorbidities, ejection fraction, left atrial diameter, preoperative beta-blocker use, leukocyte count, type of operation and intraoperative variables did not affect its occurence. Intensive care unit and hospital length of stay were longer (p< 0.05). 95.5% (n= 65) of patients were in normal sinus rhythm at discharge. Conclusion: Postoperative atrial fibrillation is a popular subject with unknowns and controversial results which may lead to wrong interpretations. We believe that every center has its own risk Yazisma Adresi/ Correspondence Dr. Ahmet Baris Durukan Umit Mahallesi 2463. Sokak No: 4/18 Yenimahalle, Ankara-Turkiye e-posta barisdurukan@yahoo.com ORIJINAL ARASTIRMA • ORIGINAL INVESTIGATION Kosuyolu Kalp Dergisi 2012;15(2):65-74 Atrial Fibrillation Following Surgical Management of Ischemic Heart Disease; One Year, Single Center, Single Surgeon Results Iskemik Kalp Hastaligi Cerrahi Tedavisi Sonrasi Gelisen Atriyal Fibrilasyon; Bir Yillik, Tek Merkez, Tek Cerrah Sonuclarimiz Kosuyolu Kalp Dergisi 2012;15(2):65-74 66 INTRODuCTION Postoperative atrial fibrillation (POAF) is the most commonly encountered rhythm disturbance following coronary artery bypass grafting (CABG) surgery with significant inhospital and future morbidity, future mortality and increased health care costs. The incidence is reported in a wide range in different studies, but POAF occurs approximately in 30% of cases following isolated CABG procedures(1-3). Despite recent advances in surgical and anesthesiological applications, its incidence has increased and is expected to rise more in future due to aging of the population. It mostly occurs within two to four days following surgery and peaks on second day(1,4). It is defined as a major morbid event due to increased incidence of minor and major thromboembolic events, hemodynamic disturbances, ventricular dysrhythmias, iatrogenic complications related to therapeutic interventions, increased intensive care unit and hospital length of stay and mortality(1). There are innumerous documented and speculated risk factors for occurence of POAF. The most consistent ones are the age, male gender, history of prior atrial fibrillation, inceased left atrial diameter, decreased ejection fraction, chronic obstructive pulmonary disease (COPD), chronic renal failure, diabetes mellitus, obesity and concomitant valvular surgery(4-6). The aim of this study is to determine the incidence and timing of POAF; identify the risk factors associated with its occurence covering the preoperative and intraoperative periods; evaluate percentage of return to sinus rhythm by discharge; and find out the impact on postoperative outcomes in a large group of patients undergoing surgery for ischemic heart disease management, in a single center, by a single surgeon. MATERIALS and METhODS Four hundred and twenty two patients were operated for ischemic heart disease and associated complications (left ventricular aneurysm and ischemic mitral insufficiency) between January 2011 and January 2012. Four patients were excluded due to preoperative existing atrial fibrillation atrial fibrillation in whom radiofrequency ablation during surgery was performed. The Hospital Ethics Committee approved the study based on retrospective data retrieval, waiving for individual consent. The patients were factors related with the population of that region. Discussion will last, but simple precautions and close monitoring will help to minimize adverse outcomes.
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