ISSN: 1305-385X
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M-mode Echocardiography
Dr. Berrin UMMANa
aKardiyoloji AD, İstanbul Üniversitesi İstanbul Tıp Fakültesi, ANKARA
Echocardiography is a diagnostic technique by which ultrasound is used to display anatomic and physiologic characteristics of the cardiovascular system. Basically, ultrasound energy is sent out from the transducer as an ultrasound packet that is then reflected back to the transducer. The returning ultrasound information can be displayed in amplitude mode (A-mode).or brightness mode (B-mode). Motion can be introduced by plotting the B-mode display against time.This is the basis of M-mode echocardiography. The term M-mode refers to the motion that is derived from the time component. If repetitive B-mode scan lines are produced and swept across the screen over time, the movement of the heart can be obtained as a time-motion recording providing dinamic cardiac images.
Because M-mode echocardiograhpy interrogates only along a single line, it does confer substantially higher temporal resolution than two dimensional echocardiography and in some instances may provide a higher degree of axial resolution. M-mode echocardiography is an superior modality for timing cardiac events or recording high velocity motion.
Although largely supplanted by two dimentional imaging, M-mode echocardiography remains a useful part of a complete ultrasound examination.Keywords: Cardiac imaging, M-mode echocardiographyTurkiye Klinikleri J Int Med Sci 2005, 1(42):19-25
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