{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/72313"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/72313","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"P-wave electrical alternans as an indicator of paroxysmal atrial fibrillation","abstract":"P-wave electrical alternans is a beat to beat alternation in the morphology of the P-wave, the wave in an electrocardiogram corresponding to atrial depolarization. In this investigation, software to measure p-wave alternans was developed and then tested on simulated data and on real data previously recorded from human subjects. The software consists of C programs managed by shell scripts and contains several features to minimize user interaction in data processing. 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