Evaluation of in-hospital electrocardiography versus 24-hour Holter for rate control in dogs with atrial fibrillation

  • Gelzer A
  • Kraus M
  • Rishniw M
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OBJECTIVES: To determine if the in-clinic ECG-derived heart rate could predict the at-home Holter-derived 24-hour average heart rate (Holter24h ), and whether it is useful to identify slow versus fast atrial fibrillation in dogs. MATERIALS AND METHODS: 82 pairs of 1-minute ECGs and 24-hour Holter recordings were acquired in 34 dogs with atrial fibrillation. The initial 24-hour Holter was used to test if the ECG heart rate can identify dogs with "slow" versus "fast" atrial fibrillation based on a Holter24h threshold value of 140 bpm. RESULTS: ECG heart rate overestimated Holter24h by 26 bpm (95% CI: 3 bpm, 48 bpm; P < 0 . 015) with a 95% limit of agreement of -21 to 83 bpm. The in-clinic ECG-derived heart rate A155 bpm had a sensitivity of 73% and a specificity of 100% for identifying a Holter24h HR A140 bpm; an in-clinic ECG-derived HR

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