{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T17:45:23Z","timestamp":1787766323389,"version":"build-2784847793"},"reference-count":19,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2012,5,31]],"date-time":"2012-05-31T00:00:00Z","timestamp":1338422400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pacing Clinical Electrophis"],"published-print":{"date-parts":[[2012,8]]},"abstract":"<jats:p><jats:bold>\n            <jats:italic>Background:<\/jats:italic>\n          <\/jats:bold>\n          <jats:italic>Cardiac resynchronization therapy (CRT) has proved to be very effective in improving morbidity and mortality in patients affected with severe congestive heart failure. Its efficacy has been shown to be greater in patients with left bundle branch block (LBBB). The aim of our study was to verify if newly proposed criteria for true LBBB identify patients with a better clinical and instrumental response to CRT.<\/jats:italic><\/jats:p><jats:p><jats:bold>\n            <jats:italic>Methods:<\/jats:italic>\n          <\/jats:bold>\n          <jats:italic>Between May 2007 and April 2011, 111 patients with left ventricular ejection fraction (LVEF) \u2264 35% and LBBB morphology received a CRT device and were divided into two groups according to QRS morphology. Group 1 (61 patients) consisted of patients with \u201ctrue\u201d LBBB morphology; group 2 (50 patients) consisted of patients with \u201cfalse\u201d LBBB. The primary endpoint was the utility of criteria for true LBBB to predict a composite endpoint of all\u2010cause mortality and hospital admission with heart failure. The secondary endpoint was the utility of the same criteria to predict an absolute increase in LVEF \u2265 10%.<\/jats:italic><\/jats:p><jats:p><jats:bold>\n            <jats:italic>Results:<\/jats:italic>\n          <\/jats:bold>\n          <jats:italic>\u201cFalse\u201d LBBB morphology and a dose of bisoprolol &lt;5 mg at last follow\u2010up were the only parameters related to clinical outcome in multivariate analysis (respectively: hazard ratio [HR] 3.98, confidence interval [CI] 95% 1.51\u201310.48; HR 0.15, CI 95% 0.05\u20130.43). \u201cTrue\u201d LBBB morphology was the only variable significantly related to a greater increase in LVEF (HR 4.57, CI 95% 1.36\u20138.28).<\/jats:italic><\/jats:p><jats:p><jats:bold>\n            <jats:italic>Conclusion:<\/jats:italic>\n          <\/jats:bold>\n          <jats:italic>True LBBB morphology is related to a higher event\u2010free survival rate in CRT patients and better echocardiographic response.<\/jats:italic><\/jats:p><jats:p><jats:italic>(PACE 2012; 35:927\u2013934)<\/jats:italic><\/jats:p>","DOI":"10.1111\/j.1540-8159.2012.03427.x","type":"journal-article","created":{"date-parts":[[2012,6,1]],"date-time":"2012-06-01T03:14:19Z","timestamp":1338520459000},"page":"927-934","source":"Crossref","is-referenced-by-count":85,"title":["Electrocardiographic Criteria of True Left Bundle Branch Block: A Simple Sign to Predict a Better Clinical and Instrumental Response to CRT"],"prefix":"10.1111","volume":"35","author":[{"given":"GIOSU\u00c8","family":"MASCIOLI","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"LUIGI","family":"PADELETTI","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"BIAGIO","family":"SASSONE","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"MASSIMO","family":"ZECCHIN","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"ELENA","family":"LUCCA","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"STEFANIA","family":"SACCHI","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"GIULIO","family":"BOGGIAN","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"ANNA 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