Abstract
BackgroundRecent randomized trial data showed fewer strokes with left atrial appendage occlusion (LAAO) after cardiac surgery in patients with atrial fibrillation. This study developed a quality initiative to increase LAAO adoption. MethodsAmong 11,099 patients who underwent isolated coronary artery bypass grafting (CABG) between January 2019 and March 2021 at 33 hospitals in Michigan, those patients with atrial fibrillation who underwent first-time, on-pump CABG were eligible (n = 1241). A goal LAAO rate of 75% was selected as a quality improvement target through a statewide collaborative. An interrupted time series analysis evaluated the change in LAAO rate before implementation (January to December 2019) vs after implementation (January 2020 to March 2021). ResultsImplementation of the quality metric improved the LAAO rate from 61% (357 of 581) before implementation to 79% (520 of 660) after implementation (P < .001). Compared with patients who did not undergo concomitant LAAO, patients who underwent LAAO (71%; 877 of 1241) were older, more frequently male, and had a lower The Society of Thoracic Surgeons Predicted Risk of Mortality score (2.9% ± 3.5% vs 3.7% ± 5.7%; P = .003), whereas other baseline characteristics, including CHA2DS2-VASc (congestive heart failure, hypertension, age ≥75 years, diabetes mellitus, stroke or transient ischemic attack, vascular disease, age 65-74 years, female sex category) scores, were similar. Mean bypass and cross-clamp times were 7 and 6 minutes longer, respectively, in the LAAO group among patients who did not undergo concomitant ablation. Operative mortality, major morbidity, blood product administration, and thromboembolic events were similar between the groups. Interrupted time series analysis showed a significant increase in LAAO rate after implementation (P = .009). ConclusionsLAAO in patients with atrial fibrillation who underwent isolated CABG did not add operative risk vs isolated CABG without LAAO. A statewide quality improvement initiative was successful in increasing the rate of concomitant LAAO and could be further evaluated as a potential quality metric in cardiac surgery.
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