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# Norway's ischaemic stroke fall over two decades left AF-related stroke unchanged
- URL: https://www.coios.me/norway-s-ischaemic-stroke-fall-over-two-decades-left-af/
- Published: 2026-09-20T09:33:50.000Z
- Updated: 2026-09-20T09:33:50.000Z
- Description: Norwegian national registry data on 227,575 incident strokes from 2001 to 2021 show non-AF ischaemic stroke falling from 204.4 to 130.8 per 100,000 person-years while atrial-fibrillation-related ischaemic stroke stayed flat at about 68.
- Author: Daniel Ryan
- Tags: Healthcare today, Cardiovascular disease, Norway, #peer-reviewed, #new, #item, #source-2026-09

The AFNOR study used mandatory nationwide Norwegian registry data to track first stroke hospitalisation or death in those aged 15 and over from 2001 to 2021\. Non-AF ischaemic stroke incidence fell by a third while AF-related ischaemic stroke incidence was unchanged (67.8 to 68.4 per 100,000 person-years) and rose in those aged 15 to 64; AF-related intracerebral haemorrhage rose in those aged 75 and over, concentrated among anticoagulated patients. Sixty-nine per cent of AF-related ischaemic strokes occurred in people not on anticoagulation.

*Why it is interesting: Locates the stroke burden that has stopped falling in undetected or untreated atrial fibrillation rather than in treatment failure.*

Source

[Journal of the American Heart Association, 18 September 2026](https://doi.org/10.1161/jaha.126.049696?ref=coios.me)

DOI

10.1161/jaha.126.049696

Type

Peer-reviewed article

Design

Nationwide registry cohort, Norway 2001-2021, 227 575 incident strokes

Verdict

New finding

Driver

[Cardiovascular disease](https://www.coios.me/d-cardiovascular/)