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New AF Diagnosed by 30-Day Rhythm Monitoring

Am Heart J; ePub 2018 Nov 12; Farris, et al

Of patients who underwent 30-day rhythm monitoring for any indication, 3.4% were found to have a new diagnosis of atrial fibrillation (AF), with most detected automatically, a new study found. Researchers reviewed 30-day rhythm monitoring data from January 2010 to August 2015. Chart review was performed on patients that had a new or preexisting diagnosis of AF. They found:

  • Of 2,326 patients without a previous diagnosis of AF, 78 (3.4%) had a diagnosis of AF during 30-day monitoring.
  • Patients with a new diagnosis of AF (mean age 68.5 years, 56% female) had a mean CHA2DS2-VASc score of 3.2 (±1.8).
  • The median time to diagnosis was 6 days; 86% were diagnosed within 14 days.
  • In 31 (40%) patients, AF was exclusively detected automatically by the monitor.
  • The most common intervention following diagnosis of AF was initiation of oral anticoagulants.


Farris GR, Smith BG, Oates ET, Colon C, Doppalapudi H. New atrial fibrillation diagnosed by 30-day rhythm monitoring. [Published online ahead of print November 12, 2018]. Am Heart J. doi:10.1016/j.ahj.2018.11.003.