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Original Research

A Clinical Score for Predicting Atrial Fibrillation in Patients with Cryptogenic Stroke or Transient Ischemic Attack

Kwong C.a · Ling A.Y.c · Crawford M.H.e · Zhao S.X.b · Shah N.H.d

Author affiliations

aDepartment of Medicine and bDivision of Cardiology, Santa Clara Valley Medical Center, San Jose, CA, cBiomedical Informatics Training Program, Stanford University, and dCenter for Biomedical Informatics Research, Stanford University School of Medicine, Stanford, CA, and eUniversity of California San Francisco, San Francisco, CA, USA

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Cardiology 2017;138:133-140

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Article / Publication Details

First-Page Preview
Abstract of Original Research

Received: January 04, 2017
Accepted: April 25, 2017
Published online: June 28, 2017
Issue release date: Published online first (Issue-in-Progress)

Number of Print Pages: 8
Number of Figures: 3
Number of Tables: 3

ISSN: 0008-6312 (Print)
eISSN: 1421-9751 (Online)

For additional information: http://www.karger.com/CRD

Abstract

Objectives: Detection of atrial fibrillation (AF) in post-cryptogenic stroke (CS) or transient ischemic attack (TIA) patients carries important therapeutic implications. Methods: To risk stratify CS/TIA patients for later development of AF, we conducted a retrospective cohort study using data from 1995 to 2015 in the Stanford Translational Research Integrated Database Environment (STRIDE). Results: Of the 9,589 adult patients (age ≥40 years) with CS/TIA included, 482 (5%) patients developed AF post CS/TIA. Of those patients, 28.4, 26.3, and 45.3% were diagnosed with AF 1-12 months, 1-3 years, and >3 years after the index CS/TIA, respectively. Age (≥75 years), obesity, congestive heart failure, hypertension, coronary artery disease, peripheral vascular disease, and valve disease are significant risk factors, with the following respective odds ratios (95% CI): 1.73 (1.39-2.16), 1.53 (1.05-2.18), 3.34 (2.61-4.28), 2.01 (1.53-2.68), 1.72 (1.35-2.19), 1.37 (1.02-1.84), and 2.05 (1.55-2.69). A risk-scoring system, i.e., the HAVOC score, was constructed using these 7 clinical variables that successfully stratify patients into 3 risk groups, with good model discrimination (area under the curve = 0.77). Conclusions: Findings from this study support the strategy of looking longer and harder for AF in post-CS/TIA patients. The HAVOC score identifies different levels of AF risk and may be used to select patients for extended rhythm monitoring.

© 2017 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Original Research

Received: January 04, 2017
Accepted: April 25, 2017
Published online: June 28, 2017
Issue release date: Published online first (Issue-in-Progress)

Number of Print Pages: 8
Number of Figures: 3
Number of Tables: 3

ISSN: 0008-6312 (Print)
eISSN: 1421-9751 (Online)

For additional information: http://www.karger.com/CRD


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