ValueSet-dicom-cid-12229-EchocardiographyAreaMethod

Code	Display	Definition
125216	Proximal Isovelocity Surface Area	Utilizes aliasing velocity (by color Doppler) of flow into an orifice (often regurgitant or stenotic) to measure instantaneous flow rate, orifice area, and flow volume.The instantaneous flow rate = (2πr2vav) * (απ) where vav is the constant velocity known as aliasing velocity at radius r, vpis the peak velocity at the orifice, and α is the angle in radians of the constant velocity surface.Estimated Orifice area = Flow rate / vp, where vp is the peak velocity at the orifice and the flow rate is the PISA peak flow rate.The volume flow is then the product of the orifice area and Velocity Time Integral.
125215	Continuity Equation by Velocity Time Integral	For conduits in series ("in continuity"), volume flow is equal: A1V1 = A2V2. where V is the velocity time integral.
125214	Continuity Equation by Peak Velocity	For conduits in series ("in continuity"), volume flow is equal: A1V1 = A2V2. where V is the peak velocity.
125213	Continuity Equation by Mean Velocity	For conduits in series ("in continuity"), volume flow is equal: A1V1 = A2V2. where V is the mean velocity.
125212	Continuity Equation	For conduits in series ("in continuity"), volume flow is equal: A1V1 = A2V2. where V is the velocity.
125210	Area by Pressure Half-Time	Mitral valve area (cm2) by Pressure Half-time = 220 (cm2.ms) / PHT (ms).
125220	Planimetry	Direct measurement of an area by tracing an irregular perimeter.