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Mitral Stenosis: Difference between revisions
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===Pitfalls:=== | ===Pitfalls:=== | ||
In any situation where the LV diastolic pressure rises rapidly (AOI, non-compliant LV, myocardial ischemia) will give an underestimation of the severity of mitral valve stenosis. | In any situation where the LV diastolic pressure rises rapidly (AOI, non-compliant LV, myocardial ischemia) will give an underestimation of the severity of mitral valve stenosis. | ||
Immediately after balloon dilatation of the mitral valve, the method unreliable PHT | Immediately after balloon dilatation of the mitral valve, the method unreliable PHT. | ||
Tachycardia at which the A-top merges with the E-top or boezemflutter which flutter waves the E-wave deformation may overestimate the incidence of mitral stenosis. | Tachycardia at which the A-top merges with the E-top or boezemflutter which flutter waves the E-wave deformation may overestimate the incidence of mitral stenosis. | ||
Heart rates of between 60 and 90/min give best results | Heart rates of between 60 and 90/min give best results | ||
==Continuity equation== | |||
The continuity equation can be used as the flow through the mitral valve is the same as the flow through the aortic valve and pulmonary valve (mitral valvular insufficiency and aortic valve insufficiency or absence of pulmonaalklepinsufficiëntie ) . | |||
MVA = TVI ( LVOT ) x area ( LVOT ) / TVI ( MV ) | |||
==Tracing mitraalkep surface== | |||
Also, tracing of the mitral valve surface is done . The result of this determination is highly dependent on the gain setting of the ultrasound device, and if it was the smallest opening of the mitral valve is traced. The results , therefore, they are less reliable and reproducible when compared with the calculated mitral valve surface. 3D - echo is very suitable to still make a reliable route, but it is, however, strongly dependent on the picture quality. | |||
==Assess suitability mitral plastic== | |||
Echocardiography can be predicted whether a patient develops a significant mitral valvular insufficiency after balloon angioplasty. Wilkins was the first to develop a score that the risk of an unsuccessful balloon angioplasty can be estimated.<cite>2</cite> | |||
Click [http://csecho.ca/cardiomath/?eqnHD=echo&eqnDisp=mvsmgh here] for Wilkins score (also called Mitral Valvuloplasty score) | Click [http://csecho.ca/cardiomath/?eqnHD=echo&eqnDisp=mvsmgh here] for Wilkins score (also called Mitral Valvuloplasty score) | ||