1/6
Answer:
LA myxoma
And for those of you who still auscultate the precordium you would have heard the elusive 'tumour plop'....of course you would.
But lets get back to the basics of M- Mode use in the PLAX view
Answer:
LA myxoma
And for those of you who still auscultate the precordium you would have heard the elusive 'tumour plop'....of course you would.
But lets get back to the basics of M- Mode use in the PLAX view
2/6
Firstly the AV:
Here is a normal m-mode image through the AV during the cardiac cycle - note:
1. How systole and diastole are identified by ECG
2. Opening of the RCC and NCC to form the 'envelope'
3. Symmetry of the envelope
4. Closure line at end syst.
Firstly the AV:
Here is a normal m-mode image through the AV during the cardiac cycle - note:
1. How systole and diastole are identified by ECG
2. Opening of the RCC and NCC to form the 'envelope'
3. Symmetry of the envelope
4. Closure line at end syst.
3/6
Compare this to m mode in severe AS where there is no identifiable opening of the cusps:
Compare this to m mode in severe AS where there is no identifiable opening of the cusps:
4/6
Now the normal MV m-mode image - m-mode through the MV leaflets:
Note
1. The movement of the AMVL during the cardiac cycle
2. Initial hump (E wave) is early diastolic filling
3. Second hump (A wave) is the flutter caused by atrial contraction
Now the normal MV m-mode image - m-mode through the MV leaflets:
Note
1. The movement of the AMVL during the cardiac cycle
2. Initial hump (E wave) is early diastolic filling
3. Second hump (A wave) is the flutter caused by atrial contraction
5/6
Follow the Anterior MV leaflet during the cycle and see if you can identify the 2 humps :
Also note that unlike the myxoma - the space in between the MV leaflets is black = blood, not white = tissue
Follow the Anterior MV leaflet during the cycle and see if you can identify the 2 humps :
Also note that unlike the myxoma - the space in between the MV leaflets is black = blood, not white = tissue
6/6
It is routinely used for LV fractional shortening as a quantification of LV systolic function:
1. C = LV end systolic internal diameter
2. B = LV end diastolic internal diameter
It is routinely used for LV fractional shortening as a quantification of LV systolic function:
1. C = LV end systolic internal diameter
2. B = LV end diastolic internal diameter
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