Left atrial appendage can still cause clinical events after ligation

A Case of Cardiogenic Stroke After Thoracoscopic Left Atrial Appendectomy

Thoracoscopic left atrial appendectomy is a minimally invasive procedure for left atrial appendage occlusion in patients with non-valvular atrial fibrillation, particularly those at a great risk for both stroke and bleeding despite appropriate oral anticoagulant therapy. It serves as an alternative strategy for stroke risk reduction. Moreover, the oral anticoagulant therapy can be discontinued after the operation. However, we encountered a 74-year old male patient who developed cardiogenic stroke after thoracoscopic left atrial appendectomy. We report this case to introduce how we evaluate the risk of postoperative cardiogenic stroke by means of contrast-enhanced cardiac computed tomography (CT), and how we formulate the postoperative patient management strategy including short-term oral anticoagulation therapy by using results of cardiac CT.

Early operative comparison of two epicardial left atrial appendage occluding systems applied during off-pump coronary revascularisation in patients with persistent atrial fibrillation

Introduction

Atrial fibrillation (AF) increases long-term mortality and stroke rate in patients having coronary artery bypass grafting (CABG). Because oral anticoagulation (OAC) is associated with both a significant incidence of discontinuation and well known complication rates, left atrial appendage occlusion might be beneficial for stroke prevention. This study presents the first clinical and practical comparison of two epicardial left appendage occluders (LAAO) accruing experience in application during off-pump coronary revascularisation in patients with persistent AF.

Material and methods

Fifteen consecutive patients with persistent AF were assigned to intraoperative LAA occlusion with either TigerPaw System II (n = 8) or AtriClip (n = 7) device during off-pump CABG and concomitant left atrial epicardial ablation. Both systems were analysed in terms of ease and safety of application along with intraoperative LAA occlusion success.

Results

Surgical risk was increased in the study population (mean EuroScore II: 3.2 ± 0.3%). In all patients in the AtriClip group successful off-pump LAA occlusion confirmed by intraoperative transoesophageal echocardiography was achieved. The TigerPaw application was quicker and easier, but in 2 patients it was unsuccessful. During the hospital stay there were no bleeding or thromboembolic events recorded.

Conclusions

In a pilot cohort epicardial LAAO during off-pump CABG in patients with persistent AF was performed safely and successfully with an AtriClip device. The TigerPaw System requires technological improvement. It might be useful to adapt the use of the type of occluding device to the LAA morphologic type and target revascularisation vessels to avoid the additional use of a heart positioner or obviate coronary compression.