Risk Assessment Algorithms
Introduction
Atrial Fibrillation is a major risk factor for acute ischaemic stroke and whilst anticoagulation therapy significantly reduces this risk, it is associated with an increased bleeding risk. A number of algorithms have been developed to stratify the risk of stoke in patients with AF and a number of these are summarised below with links to the relevant algorithm.
The ATRIA score was developed to establish the risk of a stroke in individuals with Atrial Fibrillation [AF]
Click HERE to access the ATRIA Score.
The CHADS2 is a stroke-risk grading system that estimates the risk of stroke in patients with atrial fibrillation. A high CHADS2 score corresponds to a greater risk of stroke, whilst a low CHADS2 score corresponds to a lower risk of stroke. The CHADS2 score is simple and has been validated by many studies.
Click HERE for more information on the CHADS2 algorithm.
The CHADS2 score has been superseded by the CHA2DS2VASc score and which is designed to improve the stratification of low-risk patients. It uses the same 5 risk factors but assigns a score of ‘2’ for patients ≥75 years and in addition, includes 3 new risk factors:
1. A history of vascular disease,
2. Age
65-74 years
3.
Female sex
Click HERE for more information on the CHA2DS2VASc algorithm.
The Global Anticoagulant Registry in the FIELD-Atrial Fibrillation - GARFIELD-AF tool, is a clinical prediction algorithm that stratifies patients with Atrial Fibrillation to facilitate decisions on the potential benefits & risks of anticoagulation, based on mortality, stroke and bleeding.
Click HERE for additional information on the GARFIELD-AF tool.