An atrial appendage closure device is provided that includes an insertion rod having a first end and a second end. A closure member having an outer surface and an inner surface is connected to the first end of the insertion rod. The closure member is movable between a stowed position and a deployed position, and in the deployed position, the closure member is configured to seal between the left atrial appendage and the left atrium of the heart. A securing member is further connected to the insertion rod and is configured to slide along the insertion rod to secure the device to the left atrial appendage wall. A method of closing the left atrial appendage using a closure device is also provided.第1端部と第2端部とを有する挿入棒を備えた心耳閉鎖装置が、提供される。外面と内面とを有する閉鎖部材が挿入棒の第1端部に接続される。閉鎖部材は収納姿勢と展開姿勢との間で移動可能であり、展開姿勢において閉鎖部材は左心耳と心臓の左心房との間を密封するように構成される。固定部材が挿入棒にさらに接続され、挿入棒に沿って摺動して装置を左心耳の壁に固定するように構成される。閉鎖装置を利用して左心耳を閉鎖する方法も提供される。