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Safety and Efficacy of Mini-invasive left atrial appendage closure : a propensity score analysis.

BACKGROUND: Left atrial appendage closure (LAAC) for stroke prevention is validated in patients with non-valvular atrial fibrillation (NVAF) contraindicated to oral anticoagulation. General anesthesia (GA) is often used for procedural guidance by trans-oesophageal echocardiography (TEE); however, its use may be challenging in some patients. The aim of the study was to evaluate the safety and the mid-term efficacy of a mini-invasive LAAC strategy using micro-TEE under procedural sedation.

METHODS: Comparison by propensity score of two cohorts of consecutive patients who underwent LAAC: standard TEE-guided LAAC (3D-TEE under GA) and, mini-invasive LAAC strategy (micro-TEE under procedural sedation). The primary endpoint was a composite of embolic or bleeding events, significant per-procedural complication, and cardiovascular deaths within 3 months after LAAC.

RESULTS: In total, 432 patients were included (78.7±8 years old, 32.4% of women, CHA2 DS2 VASC score:4.9±1.1); 127 patients underwent mini-invasive LAAC strategy and were compared to 305 patients standard TEE-guided LAAC. The mini-invasive strategy was acheived in 122/127 (96.1%) planned patients. The primary endpoint occurred in 11.2% of patients from the mini-invasive LAAC strategy group and in 10.3% of patients from the standard TEE group (absolute difference = 0.9%[-6.4; 4.5], hazard-ratio=1.11[0.56; 2.19], p=0.76). Procedural times, fluoroscopy duration and hospital stays were shorter in the mini-invasive LAAC strategy group (p<0.001).

CONCLUSIONS: The mini-invasive LAAC strategy is safe and effective compared to the standard TEE-guided LAAC strategy. A mini-invasive LAAC strategy may also be an important tool to help physicians to treat more patients as LAAC indications evolve in the future.

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