What is the ATRIA score?

The ATRIA score is a validated stroke-risk model for patients with atrial fibrillation. It was derived from the ATRIA cohort study and uses five weighted clinical variables — age, history of stroke, diabetes, heart failure, hypertension, proteinuria, and reduced kidney function — to estimate annual stroke risk.

How does ATRIA differ from CHA₂DS₂-VASc?

Both predict stroke in AF, but ATRIA uses a weighted point system (maximum 15) and incorporates renal function and proteinuria, which CHA₂DS₂-VASc does not. Studies suggest ATRIA has similar or slightly better discriminatory performance, especially in patients with prior stroke.

What score indicates high stroke risk?

An ATRIA score of 7 to 15 indicates high risk, corresponding to an estimated annual stroke rate of approximately 2.6% or higher. Scores of 0–5 are low risk (~0.5% per year) and a score of 6 is intermediate (~1.0% per year).

Does a low ATRIA score mean no anticoagulation is needed?

A low score suggests lower stroke risk, but clinical judgment is always required. Guidelines recommend discussing risks and benefits of anticoagulation with each patient individually, considering bleeding risk alongside stroke risk.

What is proteinuria for ATRIA scoring?

Proteinuria is defined as a urine protein-to-creatinine ratio greater than 200 mg/g or equivalent dipstick result (2+ or greater). It is only scored if the patient also has a history of stroke.

ATRIA Stroke Score

Name: ATRIA Stroke Score
Availability: InStock
Author: Nham Vu

Enter patient risk factors to calculate the ATRIA stroke risk score and estimated annual stroke rate for atrial fibrillation.

Patient Risk Factors

All fields required. Score updates instantly.

Age (years)

Age carries the highest weight in the ATRIA model.

History of stroke / TIA?

Yes No

Comorbidities

Diabetes mellitus Congestive heart failure Hypertension

Fill in the patient factors and click Calculate to see the ATRIA stroke risk score.

Risk Category

out of 15

—

Annual stroke rate: —

Score Breakdown

ATRIA Risk Reference

Score	Risk	Annual Stroke Rate
0 – 5	Low	~0.5%
6	Intermediate	~1.0%
7 – 15	High	~2.6%+

This tool is for educational and clinical decision support only. It does not replace professional medical judgment. Always evaluate bleeding risk and discuss anticoagulation options with the patient.

Summary

Enter patient risk factors to calculate the ATRIA stroke risk score and estimated annual stroke rate for atrial fibrillation.

How it works

Enter the patient's age and select whether they have a history of stroke.
Indicate whether the patient has diabetes mellitus, congestive heart failure, or hypertension.
If the patient has a history of stroke, also indicate whether they have proteinuria or an eGFR below 45 mL/min.
The calculator sums the weighted risk factors to produce the ATRIA score (0–15).
The score maps to an estimated annual stroke rate: low (0–5), intermediate (6), or high (7–15) risk category.

Use cases

Stratify stroke risk in newly diagnosed atrial fibrillation patients.
Support anticoagulation therapy decisions in clinical practice.
Compare ATRIA risk category alongside CHADS₂ or CHA₂DS₂-VASc scores.
Screen patients with AF before procedures requiring anticoagulation adjustment.
Educate patients about their individual annual stroke risk percentage.
Document risk stratification in electronic health records.

Frequently Asked Questions

Last updated: 2026-06-09 · Reviewed by Nham Vu