1. What is a Pulmonary Artery MAP Calculator?

Definition: This calculator estimates the Mean Pulmonary Artery Pressure (MPAP) based on systolic (PASP) and diastolic (PADP) pulmonary artery pressures.

Purpose: It helps medical professionals assess pulmonary hemodynamics and evaluate pulmonary hypertension.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( MPAP \) — Mean Pulmonary Artery Pressure (mmHg)
• \( PASP \) — Pulmonary Artery Systolic Pressure (mmHg)
• \( PADP \) — Pulmonary Artery Diastolic Pressure (mmHg)

Explanation: The formula weights diastolic pressure twice as much as systolic pressure to account for the longer duration of diastole in the cardiac cycle.

3. Importance of MPAP Calculation

Details: MPAP is crucial for diagnosing and monitoring pulmonary hypertension (normal range: 10-20 mmHg). Values >25 mmHg at rest indicate pulmonary hypertension.

4. Using the Calculator

Tips: Enter PASP and PADP values obtained from right heart catheterization or echocardiography. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between MPAP and systemic MAP?
A: MPAP specifically measures pressure in the pulmonary artery, while systemic MAP measures arterial pressure in the systemic circulation.

Q2: How accurate is this formula?
A: This is the standard clinical formula, though direct measurement via catheterization is more accurate.

Q3: When would MPAP be elevated?
A: In pulmonary hypertension, left heart failure, chronic lung diseases, or pulmonary embolism.

Q4: Can I use echocardiography values?
A: Yes, though echo-derived pressures may slightly underestimate true catheter-measured pressures.

Q5: What's a normal PASP/PADP range?
A: Normal PASP: 15-30 mmHg, Normal PADP: 4-12 mmHg.