Methods
A single center retrospective study was performed. This study was approved by our institutional review board (STU00212587). Echocardiography reporting software Syngo (Siemens Healthineers, Erlangen, Germany) was utilized to identify all TTEs between October 1, 2018 and January 1, 2020 in which a venous catheter was visualized in the right atrium of the heart. Structured data fields are routinely utilized by our sonographers and echocardiographers. Each study was then reviewed in detail to determine presence of suspected RAT. The electronic medical record was reviewed to obtain demographic data and past medical history including malignancy, cardiovascular disease history, previous deep vein thromboses and thromboembolic events, and kidney disease. Laboratory values for platelets and international normalized ratio (INR) were collected when available on or shortly before the day of thrombus discovery. Details regarding the indication for the catheter as well as type, date of insertion, and location on imaging were acquired. Characteristics of the thrombus including size and attachment to the atrial wall or catheter were collected. Furthermore, subsequent imaging and management including thrombectomy, initiation of anticoagulation, and adjustment, removal, and replacement of the catheter were reviewed. Outcome was examined by determining whether the thrombus resolved on follow-up imaging and by recording any embolic events attributed to the right atrial thrombus.