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The impact of atrial fibrillation on transcatheter mitral valve repair outcomes: A propensity-matched analysis.
Journal of Interventional Cardiology 2018 December
BACKGROUND: The concomitant presence of atrial fibrillation (AF) in the setting of Transcatheter Mitral Valve Repair (TMVR) represents a clinical challenge. Despite the high AF burden in patients presenting for the TMVR procedure, there are no studies that evaluate the impact of AF on in-hospital outcomes of TMVR in a nationally representative United States sample reflecting real practice. Therefore, we sought to study the outcomes of AF patients undergoing TMVR.
METHODS AND RESULTS: The study included 1026 patients from the National Inpatient Sample (NIS) registry. Patients (age ≥18 years) who had undergone TAVR as a primary procedure from 2011 to 2014 were included, using the ICD-9-CM diagnostic codes. We examined patient characteristics and in-hospital outcomes. To account for patient and hospital-level baseline differences, we performed propensity score-matched analysis. The prevalence of AF was approximately 56%. After adjusting for patient-level and hospital-level characteristics, there was no statistical difference regarding in-hospital mortality (odds ratio [OR] 0.72, 95%CI 0.29-1.80, P = 0.487), post-TMVR complications, length of stay (OR 1.15, 95%CI 0.97-1.38, P = 0.111), and cost of hospitalization (OR 1.04, 95%CI 0.94-1.14, P = 0.475) between the group with AF versus without AF. However, patients with AF were more likely to have non-routine hospital discharge (42.94% vs 35.48% P = 0.02).
CONCLUSION: AF is a frequently encountered arrhythmia among patients undergoing TMVR with MitraClip. However, TMVR can be performed safely in the vast majority of patients, irrespective of their baseline rhythm.
METHODS AND RESULTS: The study included 1026 patients from the National Inpatient Sample (NIS) registry. Patients (age ≥18 years) who had undergone TAVR as a primary procedure from 2011 to 2014 were included, using the ICD-9-CM diagnostic codes. We examined patient characteristics and in-hospital outcomes. To account for patient and hospital-level baseline differences, we performed propensity score-matched analysis. The prevalence of AF was approximately 56%. After adjusting for patient-level and hospital-level characteristics, there was no statistical difference regarding in-hospital mortality (odds ratio [OR] 0.72, 95%CI 0.29-1.80, P = 0.487), post-TMVR complications, length of stay (OR 1.15, 95%CI 0.97-1.38, P = 0.111), and cost of hospitalization (OR 1.04, 95%CI 0.94-1.14, P = 0.475) between the group with AF versus without AF. However, patients with AF were more likely to have non-routine hospital discharge (42.94% vs 35.48% P = 0.02).
CONCLUSION: AF is a frequently encountered arrhythmia among patients undergoing TMVR with MitraClip. However, TMVR can be performed safely in the vast majority of patients, irrespective of their baseline rhythm.
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