M-Mode Echocardiography
John N. Hamaty D.O.
M-Mode Echo
• Used in combination with 2-dimentional
• Rapid sampling of a region results in
placing sequential parallel data lines so
close together that individual points of
brightness appear as continuous
horizontal lines.
• 90 degrees to sample- “ice pick”
M-Mode Echo
• This narrow field allows fewer pulses with
a higher frame rate and therefore better
temporal resolution
• Factors that shorten the time required to
make a frame will act to improve temporal
Improving Temporal Resolution
Minimize depth of view
Use single focus
Narrow sector
Minimize line density
As temporal resolution improves, image
quality may degrade.
Mitral Valve Disease
M-Mode Echo
Anterior Mitral Valve Prolapse(MidLate Systole)
Mitral Stenosis
Aortic Insufficiency with fluttering
of Mitral Valve
Mitral Valve Endocarditis
Aortic Valve Disease
M-Mode Echo
Critical Aortic Stenosis
Early closure of AV due to Severe LV dysfun
St Jude Prosthetic Aortic Valve
Pulmonic Valve Disease
M-Mode Echo
Pulmonary HTN with “Flying W sign”
Left Ventricle
M-Mode Echo
Dilated Cardiomyopathy
“B” bump due to elevated EDP
Hypertrophic Cardiomyopathy
Paradoxic Septal Motion