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PVR Calculator

Pulmonary Vascular Resistance (PVR): A measure of the resistance that the right ventricle must overcome to pump blood through the pulmonary circulation. Normal PVR is typically < 250 dynes·sec/cm⁵ or < 3 Wood Units.

Hemodynamic Parameters

Guidelines & Evidence

Verified

Last Review: 2026-07-17

When to Use

When to Use

Diagnosis and classification of Pulmonary Hypertension (PH).
Differentiating Pre-capillary PH (High PVR) from Post-capillary PH (Normal/Low PVR).
Evaluation of right ventricular afterload.
Assessing reactivity during vasopressor challenge.

How it Works

Formula

PVR = (mPAP − PCWP) / CO Where mPAP = mean Pulmonary Arterial Pressure, PCWP = Pulmonary Capillary Wedge Pressure, CO = Cardiac Output.

Units

PVR is typically expressed in Wood Units (WU). To convert to dyn·s/cm⁵, multiply by 80.

Clinical Pearls

Defining PH

Per the latest guidelines, Pulmonary Hypertension is defined by an mPAP > 20 mmHg. Pre-capillary PH is further defined by a PCWP ≤ 15 mmHg AND a PVR ≥ 2 Wood Units.

Next Steps

Complementary Calculators

Fick Cardiac Output
SVR Calculator
Cardiac Output Index
MAP Calculator
Stroke Volume Index
Wood Units Calculator

The Evidence

Guideline Standard

2022 ESC/ERS Guidelines for the diagnosis and treatment of pulmonary hypertension.

Humbert M et al. • Eur Heart J.. 2022;Revised the PVR threshold from 3 Wood Units to ≥ 2 Wood Units for defining pre-capillary PH.

Last Comprehensive Review: 2026-07-17

Guidelines & Evidence

Verified

Last Review: 2026-07-17

When to Use

When to Use

Diagnosis and classification of Pulmonary Hypertension (PH).
Differentiating Pre-capillary PH (High PVR) from Post-capillary PH (Normal/Low PVR).
Evaluation of right ventricular afterload.
Assessing reactivity during vasopressor challenge.

How it Works

Formula

PVR = (mPAP − PCWP) / CO Where mPAP = mean Pulmonary Arterial Pressure, PCWP = Pulmonary Capillary Wedge Pressure, CO = Cardiac Output.

Units

PVR is typically expressed in Wood Units (WU). To convert to dyn·s/cm⁵, multiply by 80.

Clinical Pearls

Defining PH

Per the latest guidelines, Pulmonary Hypertension is defined by an mPAP > 20 mmHg. Pre-capillary PH is further defined by a PCWP ≤ 15 mmHg AND a PVR ≥ 2 Wood Units.

Next Steps

Complementary Calculators

Fick Cardiac Output
SVR Calculator
Cardiac Output Index
MAP Calculator
Stroke Volume Index
Wood Units Calculator

The Evidence

Guideline Standard

2022 ESC/ERS Guidelines for the diagnosis and treatment of pulmonary hypertension.

Humbert M et al. • Eur Heart J.. 2022;Revised the PVR threshold from 3 Wood Units to ≥ 2 Wood Units for defining pre-capillary PH.

Last Comprehensive Review: 2026-07-17

Recent Journal Updates

JAMAJul 21, 2026
Correction to Primary Composite Outcome in a Trial of Transfusion Strategy

Clinical Context

We think this might be relevant to the clinical guidance for Pulmonary Vascular Resistance (PVR).

FDA MedWatchJul 20, 2026
Early Alert: Intravascular Administration Set Issue from Baxter

Clinical Context

We think this might be relevant to the clinical guidance for Pulmonary Vascular Resistance (PVR).

FDA MedWatchJul 13, 2026
Pulmonary Valve Catheter Delivery System Recall: Medtronic Removes Harmony Delivery Catheter System (DCS)

Clinical Context

We think this might be relevant to the clinical guidance for Pulmonary Vascular Resistance (PVR).