Quantification of AS and AR

Abstract

Trans-esophageal echocardiography (TEE) is routinely used in valvular surgery in most institutions. The popularity of TEE stems from the fact that it can supplement or confirm information gained from other methods of evaluation or make completely independent diagnoses. Quantitative and qualitative assessment permits informed decisions regarding surgical intervention, type of intervention, correction of inadequate surgical repair and re-operation for complications. This review summarizes the various methods for quantification of aortic regurgitation and stenosis on TEE. The application of Doppler echo (pulsed wave, continuous wave and color) with two-dimensional echo allows the complete evaluation of AV lesions.

Computerized Determination Of Velocity Time Integral In Normal Subjects

“…Generally Doppler echocardiography provides accurate hemodynamic information for the diagnosis, assessment of severity and follow -up of patients with aortic stenosis and aortic regurgitation (3,13) . Also Doppler echocardiography may provide a reliable noninvasive method to determine pulmonary vascular resistance depending on the peak tricuspid regurgitant velocity and VTI of the right ventricular outflow tract (14) .…”

“…VTI is the integral of the spectral trace or the area under the Doppler waveform (it can be determined by planimetric analysis) (1,2) . VTI is utilized in the calculation of stroke volume, assessment of aortic valve diseases (aortic valve stenosis and regurgitation) (3,4,5), and in the predict of cardiac output (6) .…”