5 - 11 Oh and colleagues 5 utilized transesophageal echocardiography in 51 critically ill individuals who had inadequate transthoracic windows and identified underlying cardiovascular abnormalities in 30 patients (59 %).
Heidenreich and colleagues 8 utilized transesophageal echocardiography to evaluate a consecutive series of 61 patients with unexplained hypotension in an MICU.