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Hypertrophic Cardiomyopathy - Feline Cardiomyopathies (view source)
Revision as of 12:15, 3 December 2012
, 12:15, 3 December 2012→Dynamic Left Ventricular Outflow Obstruction (LVOTO)
===Dynamic Left Ventricular Outflow Obstruction (LVOTO)===
===Dynamic Left Ventricular Outflow Obstruction (LVOTO)===
This may be caused by systolic anterior motion of the mitral valve (SAM) and mid-systolic contact of the left ventricular free wall (LVFW) with the interventricular septum (IVS) during systole.
This may be caused by systolic anterior motion of the mitral valve (SAM) and mid-systolic contact of the left ventricular free wall (LVFW) with the interventricular septum (IVS) during systole - cavity obliteration.
====Systolic Anterior Motion of the Mitral Valve (SAM)====
====Systolic Anterior Motion of the Mitral Valve (SAM)====
This is where the anterior mitral valve leaflet moves towards the IVS in systole, therefore creating obstruction in the left ventricular outflow tract which interferes with the LV outflow in mid-systole. As a result of this movement, the mitral valve leaflet does not completely seal the atrioventricular annulus; this causes a secondary mitral regurgitation. The combination of turbulent blood flow in the left ventricular outflow tract and mitral regurgitation causes a systolic murmur which can be identified on auscultation.
This is where the anterior mitral valve leaflet moves towards the IVS in systole, therefore creating obstruction in the left ventricular outflow tract which interferes with the LV outflow in mid-systole. As a result of this movement, the mitral valve leaflet does not completely seal the atrioventricular annulus; this causes a secondary mitral regurgitation. The combination of turbulent blood flow in the left ventricular outflow tract and mitral regurgitation causes a systolic murmur which can be identified on auscultation.