Fig. 1From: Left atrial enlargement and clinical considerations in patients with or without a residual interatrial shunt after closure of the left atrial appendage with the WATCHMAN™-deviceLeft atrial volume measurement by 3D transthoracic echocardiography. Left atrial volumes (LAV) were measured by freehand 3D–transthoracic echocardiography using a dedicated software for left ventricular analysis (QLAB, 8.1, Philips Deutschland GmbH, Hamburg, Germany). Care was taken to manually adjust the measurement planes appropriately and exclude the pulmonary vein ostia and the left atrial appendage from the LAV at baseline, as well as at follow up controls after the procedureBack to article page