Download scientific diagram | M-mode echocardiography of the left ventricle from publication: A practical approach to transthoracic echocardiography | David Oxborough describes the process of a transthoracic echocardiographic examination and presents examples of normal echocardiograms | Transthoracic Echocardiography and Echocardiography | ResearchGate, the professional network for scientists.