• Turandot Saul, Sebastian D Siadecki, Rachel Berkowitz, Gabriel Rose, Danielle Matilsky, and Allison Sauler.
• Division of Emergency Ultrasound, Department of Emergency Medicine, Mount Sinai St. Luke's Hospital, Mount Sinai Roosevelt Hospital, New York, New York.
• J Emerg Med. 2015 Nov 1; 49 (5): 686-92.

BackgroundM-mode or "motion" mode is a form of ultrasound imaging that is of high clinical utility in the emergency department. It can be used in a variety of situations to evaluate motion and timing, and can document tissue movement in a still image when the recording of a video clip is not feasible.ObjectivesIn this article we describe several straightforward and easily performed applications for the emergency physician to incorporate M-mode into his or her practice, including the evaluation for: 1) pneumothorax, 2) left ventricular systolic function, 3) cardiac tamponade, and 4) hypertrophic cardiomyopathy.DiscussionThe emergency physician and other point-of-care ultrasound providers can use this versatile function in the evaluation of patients for a number of critical cardiopulmonary diagnoses.ConclusionA great deal of important information may be obtained with M-mode imaging through views and measurements that are relatively easy to obtain.Copyright © 2015 Elsevier Inc. All rights reserved.

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