[Echo in Practice: Cardiac Ultrasound & Whole Body U/S in Critical Care Learning about echo and ultrasound? Echopraxis is a free resource for critical care ultrasound and echo enthusiasts and nerds. Training cases & loops for CICM Focused Cardiac Ultrasound requirement to DDU. Transthoracic and transoesophageal echocardiography, lung ultrasound, FAST and so much more.]