When assessing the quality of a photoplethysmographic PPG signal 52 measured from a patient monitor (eg, a finger sensor, etc.), multiple features of the PPG signal are extracted and analyzed to produce a PPG signal or portion thereof (eg, a heartbeat). Assigning scores is made easy. The heartbeats in the PPG signal are segmented using the simultaneously acquired electrocardiograph ECG signal 50, and a plurality of extracted features are analyzed for each heartbeat. If all extracted features meet one or more predetermined criteria for each feature, the heart rate waveform is compared to a predetermined heart rate template. If the waveform matches the template (eg, within a predetermined match percentage), the heartbeat is classified as “clean”. A heart rate is classified as “noisy” if the heart rate does not match the template, or if one or more extracted features do not meet the one or more predetermined criteria.
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