An improved method and apparatus for assessing time-variant waveforms and identifying artifacts of interest therein. In one exemplary embodiment, an iterative interval search technique is applied to ECG waveform data in order to identify one or more artifacts (e.g., right atrial and right ventricular...http://www.google.com/patents/US7043293?utm_source=gb-gplus-sharePatent US7043293 - Method and apparatus for waveform assessment