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Echo features of aortic stenosis. Sayed Abou Elsoud ,MD SBCC. Agenda. Assessement of valve morphology Quantification of stenosis severity Prognosis provided by Echo. Normal aortic valve. Tricuspid (three leaflets ) valve Three comissures Normal AVA = 3-4CM2
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Echo features of aortic stenosis SayedAbouElsoud ,MD SBCC
Agenda • Assessement of valve morphology • Quantification of stenosis severity • Prognosis provided by Echo
Normal aortic valve • Tricuspid (three leaflets ) valve • Threecomissures • Normal AVA =3-4CM2 • Laminar transvalvular flow • Peak velocity <2m2 /s
Assessement of valve morphology • Site of LV outflow obstruction (types of AS) • Valvular ( most common) • Subvalvular • Fixed • Discrete membrane • Muscular band • Dynamic • Hypertophic obstructive CM • supravavular
Assessement of valve morphology • Valvular AS aetiology • Calcific (degenerative) • Congenital • rheumatic
Bicuspid AV LT/RT configurationfusion of RT&NONCOR commissures
Moderate AS • AVA = 3.14x1x1 x 33 / 73 = 1.4 cm2 • Dimensionless index = 0.47 • MAX G =58 mmhg • MEAN G = 30 mmhg
PEAK G= 127 MMHG • MEAN G= 76 MMHG • DIMENSIONLESS INDEX = 15% • AREA = 0.8 CM2