The relationship between V and RVSP in the formula is described as:

The relationship between V and RVSP in the formula is described as:

• A. Linear
• B. Exponential
• C. Quadratic
• D. Logarithmic

Answer: (C)

The relationship is quadratic because the pressure difference driving flow across the tricuspid regurgitation jet follows the simplified Bernoulli equation: ΔP ≈ 4v^2. Here v is the peak velocity of the TR jet, and the right ventricular systolic pressure is estimated as RVSP ≈ 4v^2 + RAP, with RAP being the right atrial pressure. The velocity is squared, so changes in velocity produce much larger changes in pressure, illustrating a quadratic relationship. If velocity doubles, the pressure gradient goes up by a factor of four, not just two. This is why the best description is quadratic.

The relationship is quadratic because the pressure difference driving flow across the tricuspid regurgitation jet follows the simplified Bernoulli equation: ΔP ≈ 4v^2. Here v is the peak velocity of the TR jet, and the right ventricular systolic pressure is estimated as RVSP ≈ 4v^2 + RAP, with RAP being the right atrial pressure. The velocity is squared, so changes in velocity produce much larger changes in pressure, illustrating a quadratic relationship. If velocity doubles, the pressure gradient goes up by a factor of four, not just two. This is why the best description is quadratic.