{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T16:37:26Z","timestamp":1760027846928},"reference-count":28,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2006,9,14]],"date-time":"2006-09-14T00:00:00Z","timestamp":1158192000000},"content-version":"vor","delay-in-days":13,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pacing Clinical Electrophis"],"published-print":{"date-parts":[[2006,9]]},"abstract":"<jats:p> <jats:italic>\n            <jats:bold>Background:<\/jats:bold> Inappropriate shocks continue to be a problem for patients with implantable defibrillators (ICD). We evaluated the performance of polynomial\u2010modeled ventricular electrograms (EGM) to discriminate between supraventricular tachycardia (SVT) and ventricular tachycardia (VT).<\/jats:italic> <\/jats:p><jats:p> <jats:italic>\n            <jats:bold>Methods:<\/jats:bold> Seven sets of EGM from patients having both SVT and VT documented during a single ICD interrogation were included. The cardiac cycle was analyzed off\u2010line in two parts, QR and RQ segments, which were modeled separately using third\u2010order and sixth\u2010order polynomial equations, respectively. These segments were then analyzed to determine which polynomial coefficients were most significant for rhythm discrimination.<\/jats:italic> <\/jats:p><jats:p> <jats:italic>\n            <jats:bold>Results:<\/jats:bold> When analyzing the QR segment during arrhythmia, there were statistically significant (P &lt; 0.05) correlations in 4 of 4 (100%) of the QR coefficients when comparing normal sinus rhythm (NSR) to SVT and 2 of 4 (50%) when comparing NSR to VT or SVT to VT. When analyzing the RQ segment during arrhythmia, there were statistically significant (P &lt; 0.05) correlations in 4 of 7 (57%) of the RQ coefficients when comparing NSR to SVT, 5 of 7 (71%) when comparing NSR to VT, and 3 of 7 (43%) when comparing SVT to VT. Using a cutoff value of 50% change from NSR, the ratio of first\u2010order to zero\u2010order QR coefficient was able to completely separate VT from SVT (P = 0.03) in this series of patients.<\/jats:italic> <\/jats:p><jats:p> <jats:italic>\n            <jats:bold>Conclusion:<\/jats:bold> Our data demonstrate the feasibility of simple polynomial equations that reproduce the depolarization and repolarization phases of human ventricular shock EGM. The ratio of first\u2010order to zero\u2010order QR coefficient was able to reliably discriminate between SVT and VT while reducing the polynomial model to a first\u2010order system. The results of this pilot trial may serve as the basis for a larger prospective trial implementing a discrimination algorithm for use in low computational power implantable devices.<\/jats:italic> <\/jats:p>","DOI":"10.1111\/j.1540-8159.2006.00465.x","type":"journal-article","created":{"date-parts":[[2006,9,14]],"date-time":"2006-09-14T14:53:46Z","timestamp":1158245626000},"page":"930-939","source":"Crossref","is-referenced-by-count":7,"title":["A Pilot Study Examining the Performance of Polynomial\u2010Modeled Ventricular Shock Electrograms for Rhythm Discrimination in Implantable Devices"],"prefix":"10.1111","volume":"29","author":[{"given":"JEFFREY L.","family":"WILLIAMS","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"VLADIMIR","family":"SHUSTERMAN","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"SAMIR","family":"SABA","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2006,9,14]]},"reference":[{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1114\/1.1509453"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jtbi.2005.04.022"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa013474"},{"key":"e_1_2_6_5_2","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa043399"},{"key":"e_1_2_6_6_2","volume-title":"Personal Communication","author":"Esler J","year":"2006"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(86)90837-8"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1542-474X.2006.00115.x"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF02520024"},{"key":"e_1_2_6_10_2","article-title":"Cardiac arrhythmia classification using autoregressive modeling","volume":"1","author":"Dingfei G","year":"2002","journal-title":"BioMed Eng OnLine"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1109\/10.508543"},{"key":"e_1_2_6_12_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9149(92)90570-O"},{"key":"e_1_2_6_13_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-8159.1997.tb05430.x"},{"key":"e_1_2_6_14_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9149(91)90239-H"},{"key":"e_1_2_6_15_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-8159.1986.tb05393.x"},{"key":"e_1_2_6_16_2","doi-asserted-by":"publisher","DOI":"10.1109\/10.81581"},{"key":"e_1_2_6_17_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-8159.1999.tb00328.x"},{"key":"e_1_2_6_18_2","doi-asserted-by":"publisher","DOI":"10.1016\/0022-0736(92)90100-E"},{"key":"e_1_2_6_19_2","doi-asserted-by":"publisher","DOI":"10.3109\/03091909809010001"},{"key":"e_1_2_6_20_2","doi-asserted-by":"publisher","DOI":"10.1006\/cbmr.1998.1481"},{"key":"e_1_2_6_21_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF02513285"},{"key":"e_1_2_6_22_2","doi-asserted-by":"publisher","DOI":"10.1109\/10.736760"},{"key":"e_1_2_6_23_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF02442325"},{"key":"e_1_2_6_24_2","doi-asserted-by":"publisher","DOI":"10.1161\/CIRCULATIONAHA.104.526673"},{"key":"e_1_2_6_25_2","volume-title":"Personal Communication","author":"Graves\u2010Calhoun A","year":"2005"},{"key":"e_1_2_6_26_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-8159.1990.tb06921.x"},{"key":"e_1_2_6_27_2","doi-asserted-by":"publisher","DOI":"10.1109\/51.993190"},{"key":"e_1_2_6_28_2","doi-asserted-by":"publisher","DOI":"10.1016\/0735-1097(91)90884-C"},{"key":"e_1_2_6_29_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-8159.1998.tb00204.x"}],"container-title":["Pacing and Clinical Electrophysiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1111%2Fj.1540-8159.2006.00465.x","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/j.1540-8159.2006.00465.x","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,10,12]],"date-time":"2023-10-12T16:55:16Z","timestamp":1697129716000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/j.1540-8159.2006.00465.x"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2006,9]]},"references-count":28,"journal-issue":{"issue":"9","published-print":{"date-parts":[[2006,9]]}},"alternative-id":["10.1111\/j.1540-8159.2006.00465.x"],"URL":"https:\/\/doi.org\/10.1111\/j.1540-8159.2006.00465.x","archive":["Portico"],"relation":{},"ISSN":["0147-8389","1540-8159"],"issn-type":[{"value":"0147-8389","type":"print"},{"value":"1540-8159","type":"electronic"}],"subject":[],"published":{"date-parts":[[2006,9]]}}}