Atrial fibrillation after ischemic stroke: What risk scores illuminate and what they miss

{"Atrial":[0,26],"fibrillation":[1,38,59],"after":[2,40,52,293,334],"ischemic":[3,53,257],"stroke:":[4],"What":[5],"risk":[6,34,126,197,200,204],"scores":[7,118,143],"illuminate":[8],"and":[9,76,122,132,174,188,202,214,279,322,407,428],"what":[10],"they":[11],"missWe":[12],"read":[13],"with":[14],"interest":[15],"the":[16,23,185,193,218,226,251,326,341,392,398],"study":[17],"by":[18,347,432],"Hsu":[19,348],"et":[20,349],"al.":[21,350],"describing":[22],"Prediction":[24],"of":[25,36,268,277,340,362,391],"Fibrillation":[27],"in":[28,49,94,137,192,211,254,262,401],"Ischemic":[29],"Stroke":[30],"(PAFIS)":[31],"score":[32,187,416],"for":[33,158,238,435],"stratification":[35],"atrial":[37,58,88,169,278],"detected":[39],"stroke":[41,50,54,74,112,258,264,267,288,318],"(AFDAS)":[42],"[1].The":[43,415],"authors":[44],"address":[45],"a":[46,255,274,366],"practical":[47],"question":[48],"pathways:":[51],"without":[55,411],"previously":[56,373],"recognized":[57],"(AF),":[60],"who":[61],"deserves":[62],"intensified":[63],"rhythm":[64],"surveillance?The":[65],"issue":[66],"is":[67,130,230,250,309],"not":[68,91,109,149,222,364,422],"merely":[69],"diagnostic.Detecting":[70],"AF":[71,107,129,139,142,285,300,314,330,370,381,420],"may":[72,323,331,371,429],"reclassify":[73],"mechanism":[75],"change":[77],"secondary":[78],"prevention":[79],"when":[80],"documented,":[81,131],"whereas":[82],"empirical":[83],"anticoagulation":[84,115],"based":[85,359],"only":[86],"on":[87,360,404],"cardiopathy":[89],"has":[90],"improved":[92],"outcomes":[93],"ARCADIA":[95],"[2].These":[96],"are":[97],"distinct":[98],"clinical":[99],"questions:":[100],"PAFIS":[101,402],"was":[102,209,297,315],"developed":[103],"to":[104,110,299],"predict":[105],"delayed":[106],"documentation,":[108,363,421],"establish":[111],"causality":[113],"or":[114,153,265,289,378,426],"benefit.Conversely,":[116],"stroke-risk":[117],"such":[119],"as":[120,151,233,244,338,355,365],"CHA₂DS₂-VASc":[121],"CHA₂DS₂-VA":[123],"guide":[124,146],"thromboembolic":[125],"assessment":[127],"once":[128],"treatment":[133],"gaps":[134],"persist":[135],"even":[136],"high-risk":[138],"patients":[140],"[3].Post-stroke":[141],"should":[144,351],"therefore":[145,352,417],"surveillance":[147],"intensity,":[148],"act":[150],"causal":[152],"therapeutic":[154],"shortcuts.PAFIS":[155],"assigns":[156],"points":[157],"age":[159],"≥":[160,171],"75":[161],"years,":[162],"female":[163],"sex,":[164],"valvular":[165],"heart":[166],"disease,":[167],"left":[168],"diameter":[170],"40":[172],"mm,":[173],"tricuspid":[175],"regurgitation":[176],"peak":[177],"gradient":[178,191],"≥30":[179],"mmHg.Risk":[180],"groups":[181],"were":[182],"derived":[183],"from":[184,225],"total":[186],"observed":[189],"AFDAS":[190,208,296,308,424],"development":[194],"cohort:":[195],"low":[196],"0-1,":[198],"intermediate":[199],"2-3,":[201],"high":[203],"≥4.In":[205],"temporal":[206],"validation,":[207],"documented":[210,286,333,382],"6.8%,":[212],"8.5%,":[213],"14.0%,":[215],"respectively,":[216],"although":[217],"intermediate-risk":[219],"group":[220,228],"did":[221],"separate":[223],"significantly":[224],"low-risk":[227],"[1].PAFIS":[229],"best":[231],"viewed":[232],"an":[234,245,356],"ordinal":[235],"triage":[236],"tool":[237],"expected":[239],"monitoring":[240,414],"yield,":[241],"rather":[242,260],"than":[243,261],"absolute-risk":[246],"calculator.Its":[247],"main":[248],"strength":[249],"AFDAS-specific":[252],"derivation":[253],"broad":[256],"cohort":[259],"cryptogenic":[263],"embolic":[266,327],"undetermined":[269],"source":[270],"(ESUS).Its":[271],"variables":[272],"capture":[273],"plausible":[275],"phenotype":[276],"cardiopulmonary":[280],"remodeling.However,":[281],"\\"known":[282],"AF\\"":[283],"included":[284],"before":[287,317],"within":[290],"14":[291,384],"days":[292,385],"stroke,":[294],"while":[295],"restricted":[298],"first":[301],"recorded":[302],"thereafter":[303],"[1].This":[304],"distinction":[305],"matters":[306],"because":[307],"heterogeneous":[310],"[4-6].In":[311],"some":[312],"patients,":[313],"present":[316],"but":[319],"remained":[320],"undiagnosed":[321,374],"have":[324],"caused":[325],"event.In":[328],"others,":[329],"be":[332,353,388,430],"acute":[335,393],"brain":[336],"injury":[337],"part":[339],"stroke-heart":[342,376],"syndrome.The":[343],"14-day":[344],"threshold":[345],"used":[346],"interpreted":[354],"operational":[357],"boundary":[358],"timing":[361],"validated":[367],"mechanistic":[368],"divider.Early":[369],"reflect":[372],"AF,":[375],"syndrome,":[377],"both;":[379],"conversely,":[380],"beyond":[383],"cannot":[386],"automatically":[387],"considered":[389],"independent":[390],"stroke-related":[394],"process.Monitoring":[395],"intensity":[396],"shapes":[397],"endpoint.AF":[399],"ascertainment":[400],"relied":[403],"diagnostic":[405],"codes":[406],"routine":[408],"12-lead":[409],"electrocardiography":[410],"standardized":[412],"prolonged":[413],"predicts":[418],"routine-care":[419],"true":[423],"incidence":[425],"burden,":[427],"influenced":[431],"differential":[433],"opportunities":[434]}

Authors

Institutions

Publication Details

Journal
IJC Heart & Vasculature
Published
2026-08-25
DOI
https://doi.org/10.1016/j.ijcha.2026.101998
Primary Topic
Atrial Fibrillation Management and Outcomes
Type
article
Field-Weighted Citation Impact
0.00
Controls
|||
ALL TIME
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
article

Atrial fibrillation after ischemic stroke: What risk scores illuminate and what they miss

Giulia Renda, S Saraullo, Andrea Palermi
IJC Heart & Vasculature
Atrial Fibrillation Management and Outcomes
article

Atrial fibrillation after ischemic stroke: What risk scores illuminate and what they miss

Giulia Renda, S Saraullo, Andrea Palermi
article en

Abstract

Atrial fibrillation after ischemic stroke: What risk scores illuminate and what they missWe read with interest the study by Hsu et al. describing the Prediction of Atrial Fibrillation in Ischemic Stroke (PAFIS) score for risk stratification of atrial fibrillation detected after stroke (AFDAS) [1].The authors address a practical question in stroke pathways: after ischemic stroke without previously recognized atrial fibrillation (AF), who deserves intensified rhythm surveillance?The issue is not merely diagnostic.Detecting AF may reclassify stroke mechanism and change secondary prevention when documented, whereas empirical anticoagulation based only on atrial cardiopathy has not improved outcomes in ARCADIA [2].These are distinct clinical questions: PAFIS was developed to predict delayed AF documentation, not to establish stroke causality or anticoagulation benefit.Conversely, stroke-risk scores such as CHA₂DS₂-VASc and CHA₂DS₂-VA guide thromboembolic risk assessment once AF is documented, and treatment gaps persist even in high-risk AF patients [3].Post-stroke AF scores should therefore guide surveillance intensity, not act as causal or therapeutic shortcuts.PAFIS assigns points for age ≥ 75 years, female sex, valvular heart disease, left atrial diameter ≥ 40 mm, and tricuspid regurgitation peak gradient ≥30 mmHg.Risk groups were derived from the total score and observed AFDAS gradient in the development cohort: low risk 0-1, intermediate risk 2-3, and high risk ≥4.In temporal validation, AFDAS was documented in 6.8%, 8.5%, and 14.0%, respectively, although the intermediate-risk group did not separate significantly from the low-risk group [1].PAFIS is best viewed as an ordinal triage tool for expected monitoring yield, rather than as an absolute-risk calculator.Its main strength is the AFDAS-specific derivation in a broad ischemic stroke cohort rather than in cryptogenic stroke or embolic stroke of undetermined source (ESUS).Its variables capture a plausible phenotype of atrial and cardiopulmonary remodeling.However, "known AF" included AF documented before stroke or within 14 days after stroke, while AFDAS was restricted to AF first recorded thereafter [1].This distinction matters because AFDAS is heterogeneous [4-6].In some patients, AF was present before stroke but remained undiagnosed and may have caused the embolic event.In others, AF may be documented after acute brain injury as part of the stroke-heart syndrome.The 14-day threshold used by Hsu et al. should therefore be interpreted as an operational boundary based on timing of documentation, not as a validated mechanistic divider.Early AF may reflect previously undiagnosed AF, stroke-heart syndrome, or both; conversely, AF documented beyond 14 days cannot automatically be considered independent of the acute stroke-related process.Monitoring intensity shapes the endpoint.AF ascertainment in PAFIS relied on diagnostic codes and routine 12-lead electrocardiography without standardized prolonged monitoring [1].The score therefore predicts routine-care AF documentation, not true AFDAS incidence or burden, and may be influenced by differential opportunities for

IJC Heart & VasculatureVol. 66
University of Chieti-Pescara (IT)
Zero hunger
Openalex Percentile: Top 10%
Atrial Fibrillation Management and Outcomes
AI Navigator

Ask Laika to Summarize, Analyze, and Connect papers live on the map.

Summarize Papers & Methodologies

Extract key findings, datasets, and comparative methods across publications.

Benchmark Rankings & Visual Analytics

Rank top research institutions, authors, funders, topics, and journals by Field-Weighted Citation Impact (FWCI) and paper volume with instant charts.

Connect Distant Disciplines

Bridge topological clusters on the map to find hidden collaborative intersections.