Aortic Stenosis Severity

Assessing the severity of aortic stenosis.

The height of the "a" wave of the apexcardiogram was evaluated as a marker for critical aortic stenosis in patients over 40. Critical aortic stenosis was defined as an aortic valve area < .75 cm2 with no more than mild aortic insufficiency. Phonocardiograms and apexcardiograms were performed on 72 patients with catheterization proven aortic stenosis and on 14 normal controls, all over age 40. T...

Valvuloarterial impedance, but not aortic stenosis severity, predicts syncope in patients with aortic stenosis.

BACKGROUND The presence of syncope in patients with aortic valve stenosis (AS) predicts a grave prognosis. However, the evaluation of AS severity has been limited to valve-specific factors such as aortic valve area and mean transaortic pressure gradient. Recently, valvuloarterial impedance (Zva) was proposed for the estimation of global left ventricular afterload. Therefore, because predictors ...

Aortic stenosis severity: do we need a new concept?

Assessment of site and severity in congenital aortic stenosis.

It has frequently been stated that congenital aortic valve stenosis cannot be distinguished with any confidence from discrete subvalvar aortic stenosis on clinical grounds, and that their separation rests on the results of hmmodynamic investigation and angiocardiography (Nadas, 1957; Ongley et al., 1958; Dotter et al., 1961; Braunwald et al., 1963; Engle and Ehlers, 1964). Our experience has le...

Aortic stenosis in children. Experience with echocardiographic prediction of severity.

Fifty-six children with aortic stenosis were investigated both by echocardiography and cardiac catheterization. The ratio of end-systolic wall thickness (Ws) to internal diameter (LVES) across the minor axis of the LV as determined by echocardiography and multiplied by a factor of 245 predicts left ventricular pressure (r = 0.83). Subtracting the arm systolic blood pressure from the predicted i...