<prompt> Answer this question truthfullyWhat are the functions of echocardiography and ultrasound in diagnosing and treating Buergers disease?  <response>: <reason> Color duplex ultrasound may be helpful in the diagnosis of Buergers disease. Findings on an ultrasound suggestive of Buergers disease include corkscrew collaterals. Echocardiography transthoracic or transesophageal may be helpful in detecting the source of thromboembolism and therefore, exclude Buergers disease. 