Atrial Fibrillation phenotype algorithm for the DNA Demonstration project. The algorithm selects cases based on atrial fibrillation but no presence of a heart transplant. Controls select for records with no evidence of atrial flutter, atrial fibrillation, or atrial tachycardia but with at least one ECG.
|
|
Diagnostic Codes? |
Text Keywords? |
Narrative Notes to search |
Other rules |
|
Cases |
Yes (Absence of codes) |
Disease only |
ECG Impression |
|
|
Possible/ Probable |
Yes |
Disease only |
ECG Impression, H&P, Discharge summary, all notes |
May require manual curation of all records |
|
Controls |
Yes(Absence of codes) |
Disease only |
ECG Impression, H&P, Discharge summary, all notes |
Must have ECG |
|
Excluded from Analysis |
Yes |
Disease only |
ECG Impression, H&P, Discharge summary, all notes |
|
Finding Atrial Fibrillation/Flutter on ECG Impressions:
When analyzing electrocardiograms at Vanderbilt, the following regular expression worked perfectly on ~100 patients reviewed:
REGEXP_LIKE(IMPRESSION,'((^|[ \.])AF($|[ \.]))|(a\w*[ .]?(fib[\w]*|flutter))','i')
