Formulas Flashcards by Gayatri Acharya | Brainscape

Q

Mitral valve area

A

MVA = 220/PHT

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Q

Dimensionless index

A

Lvot TVI/ AV TVI

If less than .25, severe stenosis

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Q

Velocity of sound in soft tissue

A

1540 m/sec

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Q

Wavelength

A

Velocity/frequency

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Q

Impedance Z

A

Density*velocity

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Q

Nyquist limit = PRF/2

PRF = 1/PRP

A

PRP directly related to depth

PRF inversely related to depth

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