The aortic valve area can be calculated and measured ... 60 mm Hg and a valve area of about 0.6 cm2 calculated by the continuity equation formula. Planimetry revealed a much larger valve area ...

The velocity of blood flow across the aortic valve, as determined by continuous wave Doppler, is used to calculate the transaortic pressure gradient using the modified Bernoulli equation ...

The velocity of blood flow across the aortic valve, as determined by continuous-wave Doppler, is used to calculate the transaortic pressure gradient using the modified Bernoulli equation ...

Measurement of the stenotic valve area by continuity equation using the highest velocity ... which is manometrically measured as aortic pressure. This physical phenomenon is called "pressure ...