What are the guidelines for the use of echocardiography in the evaluation of a cardiac source of embolism? 
The guidelines for the use of echocardiography in the evaluation of a cardiac source of embolism are outlined in the J Am Soc Echocardiogr. 2016;29:1-42 article. The article states that echocardiography should be used to identify the source of embolism in patients with embolic events, as well as to identify any associated structural cardiac abnormalities. It also provides advice on the use of various imaging modalities, such as transesophageal echocardiography and contrast-enhanced transthoracic echocardiography, to further evaluate the source of embolism. The article also discusses the utility of echocardiography in identifying intracardiac thrombi and other sources of embolism. Finally, it outlines the importance of appropriate anticoagulation management for patients with a suspected cardiac source of embolism.  