cliot (version 1.0.0)

atria_stroke_risk: ATRIA Stroke Risk Score

Description

Calculates the ATRIA (Anticoagulation and Risk Factors in Atrial Fibrillation) Stroke Risk Score. This tool estimates the risk of ischemic stroke in patients with atrial fibrillation. It was developed to improve upon the CHADS2 score by incorporating differential weighting for age, prior stroke, and including renal dysfunction variables.

Usage

atria_stroke_risk(age, prior_stroke, female_sex, diabetes, chf,
                  hypertension, proteinuria, egfr_lt_45_or_esrd)

Value

A list containing:

ATRIA_Score

The calculated risk score (Range 0-15).

Risk_Category

Classification (Low 0-5, Moderate 6, High 7-15).

Annual_Stroke_Risk

Estimated annual stroke rate.

Arguments

age

Numeric. Patient age in years. <65: 0 points. 65-74: 3 points. 75-84: 5 points. >=85: 6 points.

prior_stroke

Numeric (0 or 1). History of prior stroke. (1 = Yes, +4 points).

female_sex

Numeric (0 or 1). Patient is female. (1 = Yes, +1 point).

diabetes

Numeric (0 or 1). History of diabetes mellitus. (1 = Yes, +1 point).

chf

Numeric (0 or 1). History of Congestive Heart Failure. (1 = Yes, +1 point).

hypertension

Numeric (0 or 1). History of hypertension. (1 = Yes, +1 point).

proteinuria

Numeric (0 or 1). Presence of proteinuria. (1 = Yes, +1 point).

egfr_lt_45_or_esrd

Numeric (0 or 1). eGFR < 45 mL/min/1.73m^2 or End-Stage Renal Disease. (1 = Yes, +1 point).

References

Singer DE, Chang Y, Borowsky LH, et al. A new risk scheme to predict ischemic stroke and other thromboembolism in atrial fibrillation: the ATRIA (Anticoagulation and Risk Factors in Atrial Fibrillation) Study. J Am Heart Assoc. 2013;2(3):e000250. doi:10.1161/JAHA.113.000250

Examples

# Example 1: High Risk
# 85yo (+6), Female (+1), Prior Stroke (+4)
# Score = 11
atria_stroke_risk(85, 1, 1, 0, 0, 0, 0, 0)

# Example 2: Low Risk
# 70yo (+3), HTN (+1), No other factors
# Score = 4
atria_stroke_risk(70, 0, 0, 0, 0, 1, 0, 0)