Impact of anatomical variations of the left ventricular outflow tract on stroke volume calculation by Doppler echocardiography in aortic stenosis

2020 ◽  
Vol 37 (6) ◽  
pp. 815-821 ◽  
Author(s):  
Min Pu ◽  
Zhifeng Dong ◽  
Li Zhou ◽  
Richard B. Stacey ◽  
Karl Richardson ◽  
...  
Keyword(s):  
Aortic Stenosis ◽  
Stroke Volume ◽  
Doppler Echocardiography ◽  
Left Ventricular Outflow Tract ◽  
Anatomical Variations ◽  
Ventricular Outflow Tract ◽  
Left Ventricular ◽  
Outflow Tract ◽  
Volume Calculation ◽  
Left Ventricular Outflow

Aortic stenosis and left ventricular outflow tract obstruction

ESC CardioMed ◽  
2018 ◽  
pp. 807-810
Author(s):  
David Anderson
Keyword(s):  
Aortic Stenosis ◽  
Left Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Left Ventricular ◽  
Outflow Tract ◽  
Ventricular Outflow Tract Obstruction ◽  
Long Term Follow Up ◽  
Balloon Valvotomy ◽  
Left Ventricular Outflow

Left ventricular outflow tract obstruction can occur at subvalvar, valvar, and supravalvar levels. Severity and progression can be evaluated by echocardiography. Aortic valve stenosis can usually be relieved by balloon valvotomy, but some patients require surgery, either with valvotomy, valve replacement, or the Ross procedure. Sub- and supravalvar aortic stenosis require surgical management. Long-term follow-up of all patients is required.

scholarly journals Subaortic stenosis and mitral dysplasia in three Black Russian Terrier puppies

2012 ◽  
Vol 50 (No. 7) ◽  
pp. 321-326
Author(s):  
J. Pikula ◽  
J. Pikulova ◽  
H. Bandouchova ◽  
P. Kohout ◽  
K. Najman ◽  
...  
Keyword(s):  
Mitral Valve ◽  
Aortic Stenosis ◽  
Left Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Left Ventricular ◽  
Outflow Tract ◽  
Subaortic Stenosis ◽  
Maximum Pressure ◽  
Mitral Insufficiency ◽  
Left Ventricular Outflow

A combined congenital heart defect of aortic stenosis and mitral dysplasia was diagnosed in three Black Russian Terrier puppies two months old. The aortic stenosis component included both fixed and dynamic obstructions. The fixed obstruction was subvalvularly located at the entrance to the left ventricular outflow tract. The dynamic obstruction was caused by the septal leaflet of the mitral valve protruding into the left ventricular outflow tract. Mitral dysplasia resulted in mitral insufficiency leading to regurgitation through the mitral valve closer to the septal side. The maximum pressure gradient across the aortic valve amounting to 103 mmHg measured in one puppy was consistent with the most severe grade of stenosis. The diagnosis was confirmed by autopsy in all three puppies that were males and originated in one litter, so genetic influences are supposed.

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