# QP/QS Calculator

Online calculator for precise calculations of Pulmonic Blood Flow, Systemic Blood Flow, and QP/QS ratio effortlessly.

**QP/QS** estimation is crucial for patients with intra-cardiac or extra-cardiac shunts, determined through 2-D echo and spectral Doppler measurements. Our QP/QS Calculator focuses on left-to-right shunting, assessing Pulmonary Systemic Flow Ratios via conventional and simplified Doppler methods.

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**Where,**

- r = RVOT Subvalvular Velocity Time Integral
- v = Right Ventricular Outflow Tract Diameter
- l = LVOT Subvalvular Velocity Time Integral
- t = Left Ventricular Outflow Tract Diameter