PUBLIC LIBRARY / CALCULATOR

CHA₂DS₂-VASc

Estimates annual stroke and embolism risk in nonvalvular atrial fibrillation and guides oral anticoagulation indication.

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Check the population, units and version. The result shows the formula or classification; it does not make an automatic treatment decision.

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Method · Limits of application

CHA₂DS₂-VASc/Lip 2010 and CHA₂DS₂-VA/ESC 2024; maximum 9/8

Lip’s 2010 publication assessed thromboembolism stratification in patients with atrial fibrillation and described modest predictive ability for the compared schemes. Categories or rates observed in that cohort are not an individual guarantee of zero risk. The CHA2DS2-VA variant and anticoagulation decisions require the guideline and population corresponding to the edition used.

Conditions of use

Check the population, units, inclusion and exclusion criteria, and version in the original source. A result alone does not establish a diagnosis, discharge decision or prescription.

Documented parameters

Heart failure or left ventricular dysfunction
Hypertension
Age
Diabetes
Previous stroke, TIA or thromboembolism
Vascular disease (prior myocardial infarction, peripheral arterial disease, aortic plaque)
Female sex

3/3 reference cases checked. Numerical tests are not clinical validation.

Sources and documentation

Documented formula

Transcribed from the source or a recorded revision; this is not a clinical recommendation.

C (heart failure) 1 · H (hypertension) 1 · A₂ (age ≥ 75) 2 · D (diabetes) 1 · S₂ (stroke/TIA/TE) 2 · V (vascular disease) 1 · A (age 65–74) 1 · Sc (female sex) 1. Maximum: 9 points.

The CHA₂DS₂-VA (ESC 2024) is the same score without the female-sex point.

References

Identifier: cha2ds2-vasc

Original clinical content: Brazilian Portuguese.

Method version

CHA₂DS₂-VASc/Lip 2010 and CHA₂DS₂-VA/ESC 2024; maximum 9/8

cha2ds2-vasc@native-2026-10-03+a3a1f69df8a8

Source for the active edition

The bibliographic edition identifies the source. By itself, it proves neither full conformity of the formula nor clinical approval.

Synthetic cases checked (3)

Synthetic cases for checking the implementation, with no patient data.

Case 1

reference-001

Inputs

Heart failure or left ventricular dysfunction: Yes
Hypertension: Yes
Age: ≥ 75 years
Diabetes: Yes
Previous stroke, TIA or thromboembolism: Yes
Vascular disease (prior myocardial infarction, peripheral arterial disease, aortic plaque): Yes
Female sex: Yes

{
  "icc": true,
  "has": true,
  "idade": "2",
  "dm": true,
  "avc": true,
  "vasc": true,
  "fem": true
}

Expected result

{
  "score": 9,
  "va": 8
}

Actual result

{
  "score": 9,
  "va": 8
}

Case 2

reference-002

Inputs

Hypertension: Yes
Age: 65 to 74 years
Heart failure or left ventricular dysfunction: No
Diabetes: No
Previous stroke, TIA or thromboembolism: No
Vascular disease (prior myocardial infarction, peripheral arterial disease, aortic plaque): No
Female sex: No

{
  "has": true,
  "idade": "1",
  "icc": false,
  "dm": false,
  "avc": false,
  "vasc": false,
  "fem": false
}

Expected result

{
  "va": 2
}

Actual result

{
  "score": 2,
  "va": 2
}

Case 3

reference-003

Inputs

Female sex: Yes
Age: < 65 years
Heart failure or left ventricular dysfunction: No
Hypertension: No
Diabetes: No
Previous stroke, TIA or thromboembolism: No
Vascular disease (prior myocardial infarction, peripheral arterial disease, aortic plaque): No

{
  "fem": true,
  "idade": "0",
  "icc": false,
  "has": false,
  "dm": false,
  "avc": false,
  "vasc": false
}

Expected result

{
  "score": 1,
  "va": 0
}

Actual result

{
  "score": 1,
  "va": 0
}

Code and reproducibility

This tool’s code on GitHub

Download code and tests

Sources, version and reproduction instructions

The code tests are technical checks. Clinical approval and professional translation review are recorded separately.

Relationship with cancer research

General context — relationship to be defined

A resource for general clinical contexts. This edition does not assign a specific oncological relationship; selecting it for a study requires a justified question, population and purpose.