{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,23]],"date-time":"2026-06-23T16:20:00Z","timestamp":1782231600141,"version":"3.54.5"},"reference-count":24,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2026,1,16]],"date-time":"2026-01-16T00:00:00Z","timestamp":1768521600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2026,1,16]],"date-time":"2026-01-16T00:00:00Z","timestamp":1768521600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Egypt Heart J"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Prolonged corrected QTcs are a frequent and potentially life-threatening finding In ICU patients, the presence of prolonged QTc is a prevalent and potentially life-threatening condition, as it increases the risk of TdP and sudden cardiac death. Risk factors include sepsis, electrolyte imbalances, and QTc-prolonging drugs. However, data from South Asian ICUs remain limited.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We conducted a 12-month prospective observational study in two tertiary care ICUs in Lahore and Karachi, enrolling 812 adult patients without pre-existing QTc abnormalities. QTc was calculated using Bazett\u2019s formula, with prolongation defined as QTc\u2009\u2265\u2009450ms (men) or QTc\u2009\u2265\u2009470 ms (women). Clinical, biochemical, and pharmacologic data were collected. Multivariate logistic regression identified independent predictors of ICU-acquired QTc prolongation.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      QTc prolongation occurred in 260 (32.0%) patients. These individuals had higher rates of sepsis (55%), acute kidney injury (45%), and electrolyte disturbances (hypokalemia 35%, hypomagnesemia 30%). QTc-prolonging medications, particularly haloperidol (22%), were more common among cases. Septic shock, coronary artery disease, renal dysfunction, and haloperidol were significant independent predictors. Prolonged QTc was associated with longer ICU stays (median 10 vs. 5 days) and higher mortality (45% vs. 18%,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>In this inaugural multicenter study conducted in Pakistan, it was observed that one-third of patients in the ICU experienced QTc prolongation, which was associated with sepsis, renal dysfunction, and the administration of specific medications. These findings underscore the importance of QTc monitoring, electrolyte management, and cautious drug selection to reduce arrhythmia-related complications.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s43044-026-00713-y","type":"journal-article","created":{"date-parts":[[2026,1,16]],"date-time":"2026-01-16T08:39:49Z","timestamp":1768552789000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["QTc interval prolongation in ICU patients: risk assessment and predictors"],"prefix":"10.1186","volume":"78","author":[{"given":"Muhammad Arsalan Sharif","family":"Awan","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bhavna","family":"Singla","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Areeba","family":"Hasan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohamed Omer W.","family":"Abdalla","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rabia","family":"Altaf","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shivam","family":"Singla","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Samia","family":"Afaq","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mian Waqar","family":"Mustafa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fahad","family":"Asim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,1,16]]},"reference":[{"key":"713_CR1","doi-asserted-by":"publisher","first-page":"115","DOI":"10.1186\/s13054-024-04879-2","volume":"28","author":"W Liu","year":"2024","unstructured":"Liu W, Shao R, Zhang S et al (2024) Characteristics, predictors and outcomes of new-onset QTc prolongation in sepsis: a multicenter retrospective study. 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Written informed consent was obtained from all participants or their legally authorized representatives before inclusion in the study. The research adhered to the ethical principles outlined in the Declaration of Helsinki.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"All authors have reviewed the manuscript and consent to its publication in the Egyptian Heart Journal. No identifying information of patients has been disclosed.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"5"}}