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Fractional Flow Reserve (FFR) Coronary Stenosis Calculator

Easily calculate and compute fractional flow reserve (ffr) coronary stenosis calculator with accurate equations, live formulas, and expert guidance.

Calculated Result
0.72 ratio

Fractional Flow Reserve Index (FFR)

Fractional Flow Reserve Index (FFR)

0.72 ratio

Simplified Pd Over Pa Ratio

0.74

Translesional Pressure Gradient Mm Hg

24

Hyperemic Agent Used

INTRAVENOUS ADENOSINE

Revascularization Recommendation

HEMODYNAMICALLY SIGNIFICANT ISCHEMIA (FFR <= 0.80: PCI Stenting Indicated)

0.72 — ratio

Calculation Breakdown

  1. Applied FormulaCalculates Fractional Flow Reserve (FFR) and instantaneous wave-free ratio (iFR) from translesional distal coronary pressure Pd and aortic pressure Pa during hyperemic catheterization to guide coronary revascularization (PCI/stenting).\text{FFR} = \frac{P_d - P_v}{P_a - P_v} \approx \frac{P_d}{P_a}, \quad \text{Stenosis Resistance } R_s = \frac{P_a - P_d}{Q_{\text{max}}}

Coronary FFR Stenosis Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.00.30.50.81.0Fractional Flow Reserve Index (FFR)

What Is the Fractional Flow Reserve (FFR) Coronary Stenosis Calculator?

This tool computes fractional flow reserve (ffr) coronary stenosis calculator with high precision arithmetic.

How Does the Fractional Flow Reserve (FFR) Coronary Stenosis Calculator Work?

Calculates Fractional Flow Reserve (FFR) and instantaneous wave-free ratio (iFR) from translesional distal coronary pressure Pd and aortic pressure Pa during hyperemic catheterization to guide coronary revascularization (PCI/stenting).

Fractional Flow Reserve (FFR) Coronary Stenosis Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

FFR=Pd−PvPa−Pv≈PdPa,Stenosis Resistance Rs=Pa−PdQmax\text{FFR} = \frac{P_d - P_v}{P_a - P_v} \approx \frac{P_d}{P_a}, \quad \text{Stenosis Resistance } R_s = \frac{P_a - P_d}{Q_{\text{max}}}

Calculates Fractional Flow Reserve (FFR) and instantaneous wave-free ratio (iFR) from translesional distal coronary pressure Pd and aortic pressure Pa during hyperemic catheterization to guide coronary revascularization (PCI/stenting).

How to Use the Fractional Flow Reserve (FFR) Coronary Stenosis Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Fractional Flow Reserve (FFR) Coronary Stenosis Calculator Example

Input Values:

distalCoronaryPressurePdMmHg:68
aorticPressurePaMmHg:92
centralVenousPressureCvpMmHg:5
hyperemicAgentAdministered:1
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required ratio.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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