How is the CHA₂DS₂‑VASc score calculated?

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Last updated: October 10, 2026 • View editorial policy

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How to Calculate the CHA₂DS₂-VASc Score

The CHA₂DS₂-VASc score is calculated by assigning points for specific clinical risk factors, with a maximum possible score of 9 points. 1

Scoring Components

Based on the most recent 2024 ESC guidelines, assign points as follows 1:

C - Congestive Heart Failure (1 point)

  • Symptoms and signs of heart failure (regardless of ejection fraction—includes HFpEF, HFmrEF, and HFrEF)
  • OR asymptomatic left ventricular ejection fraction ≤40%

H - Hypertension (1 point)

  • Resting blood pressure >140/90 mmHg on at least two occasions
  • OR current antihypertensive treatment

A₂ - Age ≥75 years (2 points)

  • Two points awarded for age 75 or above

D - Diabetes Mellitus (1 point)

  • Type 1 or type 2 diabetes by current diagnostic criteria
  • OR treatment with glucose-lowering therapy

S₂ - Prior Stroke/TIA/Arterial Thromboembolism (2 points)

  • Previous stroke, transient ischemic attack, or systemic thromboembolism
  • Weighted as 2 points due to highly elevated recurrence risk

V - Vascular Disease (1 point)

  • Coronary artery disease including:
    • Prior myocardial infarction
    • Angina
    • History of coronary revascularization (surgical or percutaneous)
    • Significant CAD on angiography or cardiac imaging

A - Age 65-74 years (1 point)

  • One point for age between 65 and 74 years

Sc - Sex Category (Female) (1 point)

  • One point for female sex 2

Important Updates from 2024 Guidelines

Note that the 2024 ESC guidelines now use "CHA₂DS₂-VA" (without the sex category component), removing the female sex criterion from the scoring system. 1 This represents a significant change from prior versions that included the "Sc" component. The rationale is to provide a more equitable risk assessment that does not automatically assign higher risk based solely on biological sex.

Calculation Method

Simply add up all applicable points:

  • Minimum score: 0 points
  • Maximum score: 9 points (with sex category) or 8 points (CHA₂DS₂-VA without sex category)

Clinical Application

The score stratifies thromboembolic risk in atrial fibrillation patients 1:

  • Score of 0: Lowest risk
  • Score of 1: Elevated risk—oral anticoagulation should be considered (Class IIa recommendation)
  • Score ≥2: Higher risk—oral anticoagulation is recommended

The 2024 guidelines emphasize that a score of 1 should be considered an indicator of elevated thromboembolic risk for initiating oral anticoagulation decisions. 1

Common Pitfalls

  • Age scoring: Remember that age contributes twice—1 point for ages 65-74, then an additional 2 points (total 3) for age ≥75
  • Heart failure definition: Any symptomatic heart failure counts, regardless of ejection fraction—don't limit this to reduced EF only
  • Vascular disease: This is broader than just prior MI; includes any significant coronary disease, even if only documented on imaging
  • Hypertension: Patients on antihypertensive medication count, even if blood pressure is currently controlled
  • Version awareness: Clarify whether you're using the traditional CHA₂DS₂-VASc (with sex category) or the updated CHA₂DS₂-VA (without sex category) per 2024 guidelines 1

References

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Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.