Comparison of T-wave alternans testing during treadmill and bicycle exercise in patients with congestive heart failure

      Recent advances in signal processing have made it possible to measure T-wave alternans (TWA) during treadmill exercise (summarized in Rosenbaum et al
      • Rosenbaum D.S.
      • Albrecht P.
      • Cohen R.J.
      Predicting sudden cardiac death from T wave alternans of the surface electrocardiogram promise and pitfalls.
      ). Data can be prefiltered to suppress noise at repetitive frequencies. In addition, a sharpness criterion for the alternans peak further reduces the impact of repetitive motion artifact on the determination of alternans. Accordingly, the purpose of this report was to assess the validity of microvolt TWA testing during treadmill exercise compared with bicycle exercise.
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