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Short-term ECG recordings for heart rate assessment in patients with chronic atrial fibrillation

Michal Chudzik1, Iwona Cygankiewicz1, Artur Klimczak1

  • 1Department of Electrocardiology, Medical University of Lodz, Poland.

Archives of Medical Science : AMS
|October 3, 2014
PubMed

Insights

For atrial fibrillation (AFib) patients, 6-hour ECG recordings best represent 24-hour heart rate control and irregularity. Short ECGs, especially those outside 11 AM-2 PM, are not reliable for prognosis.

Area of Science:

  • Cardiology
  • Medical Technology
  • Data Analysis

Background:

  • Assessing heart rate control in atrial fibrillation (AFib) lacks standardized ECG recording duration.
  • Current practices do not definitively establish optimal ECG length for accurate rate assessment.

Purpose of the Study:

  • To determine if short-term ECGs can accurately reflect 24-hour heart rate and irregularity in AFib patients.
  • To identify optimal ECG recording durations and times for reliable AFib monitoring.

Main Methods:

  • Fifty AFib patients underwent 24-hour Holter monitoring.
  • Mean heart rate (mHR) and coefficient of irregularity (CI) were analyzed from various short-term intervals (5- and 60-minute) across different times of day.

Main Results:

  • A 6-hour ECG sample showed the highest correlation for mean heart rate within 24 hours.
  • Specific 1-hour intervals (11 AM-2 PM) also demonstrated good correlation for mHR.
  • Only 6-hour intervals correlated well for coefficient of irregularity (CI), while shorter intervals did not.

Conclusions:

  • Long-term ECG recordings (6 hours) are necessary for accurate assessment of both mean heart rate and irregularity in AFib.
  • 1-hour ECGs between 11 AM and 2 PM may predict 24-hour mean heart rate.
  • Short-term CI recordings are currently insufficient for clinical prognosis of ventricular irregularity in AFib.
Abstract

Keywords:
atrial fibrillationrate irregularityventricular rate control

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