Cubic spline interpolation of consecutive isoelectric points allows for the development of a reliable beat-by-beat ST segment displacement signal in ambulatory ECG recordings.
Cubic spline interpolation provides a reliable method for correcting baseline wander and measuring beat-by-beat ST segment displacements in ambulatory ECGs.
Correction of baseline wander is one of the major problems in ambulatory ECG analysis. In this work, the isoelectric line of the ECG signal is estimated by interpolating consecutive isoelectric points with third order lines. A fiducial point is found with minimization techniques in a 100 msec window before the peak of the R wave. The definition of a continuous line permits synchronous measurements at any point of the ST segment. The technique (called cubic spline interpolation) allows the development of a reliable beat-by-beat ST segment displacement signal.
Badilini et al. (Wed,) conducted a other in Ambulatory ECG analysis. Cubic spline interpolation was evaluated on Development of a reliable beat-by-beat ST segment displacement signal. Cubic spline interpolation of consecutive isoelectric points allows for the development of a reliable beat-by-beat ST segment displacement signal in ambulatory ECG recordings.