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. Author manuscript; available in PMC: 2011 Jun 17.
Published in final edited form as: Ann Biomed Eng. 2010 Mar 11;38(7):2346–2357. doi: 10.1007/s10439-010-9993-6

FIGURE 3.

FIGURE 3

Example of signal processing for fish #11 ECG recorded at 3 dpa. (a) Raw signal directly recorded from sedated zebrafish using Labview at sampling rate of 1000 Hz. (b) Breakdown of raw signals into frequency segments via wavelet transform. Low frequency signals (DC to 0.49 Hz) were completely filtered. Thresholds were applied to each of the individual frequency ranges to suppress corresponding noise levels. Sub-threshold values were set to zero. Signals within frequency range from 0.98 to 7.81 Hz were reserved to ensure fidelity of T-waves. (c) Reconstructed ECG signals from processed frequency segments were shown after applying inverse wavelet transform.