{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,27]],"date-time":"2025-10-27T10:47:17Z","timestamp":1761562037297},"reference-count":11,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2015,10,30]],"date-time":"2015-10-30T00:00:00Z","timestamp":1446163200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Noninvasive Electrocardiol"],"published-print":{"date-parts":[[2016,7]]},"abstract":"<jats:sec><jats:title>Background<\/jats:title><jats:p>About 30% of patients do not have an effective cardiac resynchronization therapy (CRT). Routine assessment of CRT by devices interrogation (DI) is not entirely reliable. Additional information provide detailed QRS analysis in 24\u2010hour ECG, however it is time\u2010consuming. The aim of the study was the assessment of R\/S ratio variability in lead V<jats:sub>1<\/jats:sub>between selected fragments of 24\u2010hour ECG as a predictor of incomplete biventricular pacing (BIVP) during full 24\u2010hour ECG.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The 12\u2010lead 24\u2010hour ECGs of 43 patients with sinus rhythm were studied. During 24\u2010hour ECG the 6\u2010minute walk test (6MWT) was performed. The CRT was assessed by analyzing DI and full 24\u2010hour ECG and four 1\u2010minute fragments of these ECG recordings: during the minimum and the maximum heart rate and at the 1st and last minute of 6MWT.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>During DI the effective (&gt;95%) BIVP was present in 36 patients (83.7%). Analysis of full 24\u2010hour ECG confirmed appropriate BIVP in 31 patients (72%) and suspected incomplete BIVP (\u226495%) in 12 patients (28%). In 9\/12 patients the R\/S ratio variability in lead V<jats:sub>1<\/jats:sub>was visible between selected ECG fragments of 24\u2010hour ECG. These results were not associated with the results of DI but were significantly associated with full 24\u2010hour analysis of QRS.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>R\/S variability in lead V<jats:sub>1<\/jats:sub>between selected fragments of 24\u2010hour ECG can be considered a predictor of potentially incomplete BIVP confirmed by further complete 24\u2010hour ECG analysis in patients with appropriate pacing reported during DI.<\/jats:p><\/jats:sec>","DOI":"10.1111\/anec.12326","type":"journal-article","created":{"date-parts":[[2015,10,30]],"date-time":"2015-10-30T09:48:40Z","timestamp":1446198520000},"page":"397-403","source":"Crossref","is-referenced-by-count":4,"title":["R\/S Ratio Variability in Lead V<sub>1<\/sub>Observed between Selected Four 1\u2010Minute ECG Fragments of 24\u2010Hour ECG as a Predictor of Incomplete Resynchronization during Full 24\u2010Hour ECG: Pilot Study"],"prefix":"10.1111","volume":"21","author":[{"given":"Dominika","family":"Pyszno\u2010Prokopowicz","sequence":"first","affiliation":[{"name":"Clinic of Cardiac Rehabilitation and Noninvasive Electrocardiology the Institute of Cardiology in Warsaw Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rafa\u0142","family":"Baranowski","sequence":"additional","affiliation":[{"name":"the Clinic of Heart Rhythm Disorders the Institute of Cardiology in Warsaw Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Robert","family":"Bodalski","sequence":"additional","affiliation":[{"name":"the Clinic of Heart Rhythm Disorders the Institute of Cardiology in Warsaw Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Magdalena","family":"Madej","sequence":"additional","affiliation":[{"name":"the Clinic of Heart Rhythm Disorders the Institute of Cardiology in Warsaw Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ryszard","family":"Piotrowicz","sequence":"additional","affiliation":[{"name":"Clinic of Cardiac Rehabilitation and Noninvasive Electrocardiology the Institute of Cardiology in Warsaw Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2015,10,30]]},"reference":[{"key":"e_1_2_6_2_1","first-page":"S133","article-title":"ESC\/EHRA. 2013 ESC Guidelines on cardiac pacing and cardiac resynchronization therapy. The task force on cardiac pacing and resynchronization therapy of the European Society of Cardiology (ESC). Developed in collaboration with the european heart rhythm association (EHRA)","volume":"71","author":"Brignole M","year":"2013","journal-title":"Polish Heart J"},{"key":"e_1_2_6_3_1","first-page":"48","article-title":"Cardiac resynchronization therapy in the treatment of chronic heart failure","volume":"4","author":"Wili\u0144ski J","year":"2008","journal-title":"Guide GPs"},{"key":"e_1_2_6_4_1","first-page":"1449","article-title":"ESC\/EHRA. Guidelines for cardiac pacing and cardiac resynchronization therapy. the task force for cardiac pacing and cardiac resynchronization therapy of the European Society of Cardiology. Developed in collaboration with the European Heart Rhythm Association","volume":"65","author":"Vardas PE","year":"2007","journal-title":"Polish Heart J"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jacc.2008.12.022"},{"key":"e_1_2_6_6_1","doi-asserted-by":"crossref","first-page":"404","DOI":"10.5603\/KP.a2014.0246","article-title":"Analysis of the QRS Variability in Lead V1 in 24\u2010hour ECG in patients with implanted CRT Pacemaker in the evaluation of the functioning of the device in patients with sinus rhythm\u2014a pilot study","volume":"73","author":"Pyszno\u2010Prokopowicz D","year":"2015","journal-title":"Polish Heart Journal"},{"key":"e_1_2_6_7_1","first-page":"237","article-title":"The 6\u2010Minute walking test clinical usefulness and limitations","volume":"68","author":"Wolszakiewicz J","year":"2010","journal-title":"Polish Heart J"},{"key":"e_1_2_6_8_1","first-page":"225","article-title":"SENiT. Guidelines on the implementation of long\u2010term ECG recording. The task force of the section for noninvasive electrocardiology and telemedicine of Polish Cardiac Society","volume":"71","author":"Baranowski R","year":"2013","journal-title":"Polish Heart J"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jacc.2006.05.031"},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jacc.2006.03.056"},{"key":"e_1_2_6_11_1","doi-asserted-by":"publisher","DOI":"10.1093\/europace\/eup273"},{"key":"e_1_2_6_12_1","first-page":"4","article-title":"Cardiac resynchronization and atrial fibryllation","volume":"16","author":"Ganesh SK","year":"2009","journal-title":"Cardiol J"}],"container-title":["Annals of Noninvasive Electrocardiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1111%2Fanec.12326","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1111%2Fanec.12326","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/anec.12326","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,6,12]],"date-time":"2024-06-12T03:51:30Z","timestamp":1718164290000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/anec.12326"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2015,10,30]]},"references-count":11,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2016,7]]}},"alternative-id":["10.1111\/anec.12326"],"URL":"https:\/\/doi.org\/10.1111\/anec.12326","archive":["Portico"],"relation":{},"ISSN":["1082-720X","1542-474X"],"issn-type":[{"value":"1082-720X","type":"print"},{"value":"1542-474X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2015,10,30]]}}}