
Keywords: کنتراست اکوکاردیوگرافی خود به خودی; device-related thrombus; left atrial appendage; percutaneous left atrial appendage occlusion; Watchman device; AF; atrial fibrillation; LAA; left atrial appendage; SEC; spontaneous echocardiographic contrast; TEE; transesophageal echocardiography;