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The ECG Characteristics of Patients With Isolated Hypomagnesemia

Electrocardiographic (ECG) characteristics of patients with isolated hypomagnesemia are not well defined. We aimed to investigate these ECG characteristics in order to define clearly the features of isolated hypomagnesemia. Lower serum magnesium could affect ECG parameters after excluding potential...

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Published in:Frontiers in physiology 2021-01, Vol.11, p.617374-617374
Main Authors: Yang, Yiheng, Chen, Cheng, Duan, Penghong, Thapaliya, Suman, Gao, Lianjun, Dong, Yingxue, Yin, Xiaomeng, Yang, Xiaolei, Zhang, Rongfeng, Tan, Ruopeng, Hui, Simei, Wang, Yue, Sutton, Richard, Xia, Yunlong
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container_title Frontiers in physiology
container_volume 11
creator Yang, Yiheng
Chen, Cheng
Duan, Penghong
Thapaliya, Suman
Gao, Lianjun
Dong, Yingxue
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Tan, Ruopeng
Hui, Simei
Wang, Yue
Sutton, Richard
Xia, Yunlong
description Electrocardiographic (ECG) characteristics of patients with isolated hypomagnesemia are not well defined. We aimed to investigate these ECG characteristics in order to define clearly the features of isolated hypomagnesemia. Lower serum magnesium could affect ECG parameters after excluding potential confounders. This retrospective study was of patients with low serum magnesium
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We aimed to investigate these ECG characteristics in order to define clearly the features of isolated hypomagnesemia. Lower serum magnesium could affect ECG parameters after excluding potential confounders. This retrospective study was of patients with low serum magnesium &lt;0.65 mmol/L compared with the same patients after restoration to normal serum magnesium. Patients with hypokalemia, hypocalcemia and other electrolyte disturbances were excluded. ECG parameters manually determined and analyzed were P wave dispersion, PR interval, QRS duration, ST-T changes, T wave amplitude, T peak-to-end interval (Tpe), corrected Tpe (Tpec), QT, corrected QT (QTc), QT peak corrected (QTpc) and Tpe dispersion, Tpe/QT ratio. Two-hundred-and-fourteen patients with isolated hypomagnesemia were identified with 50 of them (56.9 ± 13.6 years; 25 males) being eligible for final analysis from 270,997 patients presenting April 2011-October 2017. In the period of isolated hypomagnesemia, P wave duration was found prolonged ( ≤ 0.02); as was QTc (439 ± 27 vs. 433 ± 22, p = 0.01). Tpec (122 ± 24vs. 111 ± 22, = 0.000) and Tpe/QT ratio (0.29 ± 0.05 vs. 0.27 ± 0.05, = 0.000) were increased. QTpc decreased during hypomagnesemia (334 ± 28 vs. 342 ± 21, = 0.02). However, no significant differences were found in PR interval, QRS duration (85 ± 12 ms vs. 86 ± 12 ms, = 0.122) and ST-T segments between the patients and their own controls. In patients with isolated hypomagnesemia, P wave duration, QTc, Tpec, and Tpe/QT ratio suggesting atrial depolarization and ventricular repolarization dispersion were significantly increased compared with normal magnesium levels in the same patients after restoration to normal levels.</description><identifier>ISSN: 1664-042X</identifier><identifier>EISSN: 1664-042X</identifier><identifier>DOI: 10.3389/fphys.2020.617374</identifier><identifier>PMID: 33584338</identifier><language>eng</language><publisher>Switzerland: Frontiers Media S.A</publisher><subject>electrocardiogram ; Physiology ; repolarization dispersion ; serum magnesium ; sudden cardiac death ; ventricular arrhythmia</subject><ispartof>Frontiers in physiology, 2021-01, Vol.11, p.617374-617374</ispartof><rights>Copyright © 2021 Yang, Chen, Duan, Thapaliya, Gao, Dong, Yin, Yang, Zhang, Tan, Hui, Wang, Sutton and Xia.</rights><rights>Copyright © 2021 Yang, Chen, Duan, Thapaliya, Gao, Dong, Yin, Yang, Zhang, Tan, Hui, Wang, Sutton and Xia. 2021 Yang, Chen, Duan, Thapaliya, Gao, Dong, Yin, Yang, Zhang, Tan, Hui, Wang, Sutton and Xia</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c465t-e583961bb5aa9b81c2afa3480d20e01f693c23580512f1826dcb39c8b707c2bc3</citedby><cites>FETCH-LOGICAL-c465t-e583961bb5aa9b81c2afa3480d20e01f693c23580512f1826dcb39c8b707c2bc3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7873644/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7873644/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,885,27924,27925,53791,53793</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33584338$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Yang, Yiheng</creatorcontrib><creatorcontrib>Chen, Cheng</creatorcontrib><creatorcontrib>Duan, Penghong</creatorcontrib><creatorcontrib>Thapaliya, Suman</creatorcontrib><creatorcontrib>Gao, Lianjun</creatorcontrib><creatorcontrib>Dong, Yingxue</creatorcontrib><creatorcontrib>Yin, Xiaomeng</creatorcontrib><creatorcontrib>Yang, Xiaolei</creatorcontrib><creatorcontrib>Zhang, Rongfeng</creatorcontrib><creatorcontrib>Tan, Ruopeng</creatorcontrib><creatorcontrib>Hui, Simei</creatorcontrib><creatorcontrib>Wang, Yue</creatorcontrib><creatorcontrib>Sutton, Richard</creatorcontrib><creatorcontrib>Xia, Yunlong</creatorcontrib><title>The ECG Characteristics of Patients With Isolated Hypomagnesemia</title><title>Frontiers in physiology</title><addtitle>Front Physiol</addtitle><description>Electrocardiographic (ECG) characteristics of patients with isolated hypomagnesemia are not well defined. We aimed to investigate these ECG characteristics in order to define clearly the features of isolated hypomagnesemia. Lower serum magnesium could affect ECG parameters after excluding potential confounders. This retrospective study was of patients with low serum magnesium &lt;0.65 mmol/L compared with the same patients after restoration to normal serum magnesium. Patients with hypokalemia, hypocalcemia and other electrolyte disturbances were excluded. ECG parameters manually determined and analyzed were P wave dispersion, PR interval, QRS duration, ST-T changes, T wave amplitude, T peak-to-end interval (Tpe), corrected Tpe (Tpec), QT, corrected QT (QTc), QT peak corrected (QTpc) and Tpe dispersion, Tpe/QT ratio. Two-hundred-and-fourteen patients with isolated hypomagnesemia were identified with 50 of them (56.9 ± 13.6 years; 25 males) being eligible for final analysis from 270,997 patients presenting April 2011-October 2017. In the period of isolated hypomagnesemia, P wave duration was found prolonged ( ≤ 0.02); as was QTc (439 ± 27 vs. 433 ± 22, p = 0.01). Tpec (122 ± 24vs. 111 ± 22, = 0.000) and Tpe/QT ratio (0.29 ± 0.05 vs. 0.27 ± 0.05, = 0.000) were increased. QTpc decreased during hypomagnesemia (334 ± 28 vs. 342 ± 21, = 0.02). However, no significant differences were found in PR interval, QRS duration (85 ± 12 ms vs. 86 ± 12 ms, = 0.122) and ST-T segments between the patients and their own controls. 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In the period of isolated hypomagnesemia, P wave duration was found prolonged ( ≤ 0.02); as was QTc (439 ± 27 vs. 433 ± 22, p = 0.01). Tpec (122 ± 24vs. 111 ± 22, = 0.000) and Tpe/QT ratio (0.29 ± 0.05 vs. 0.27 ± 0.05, = 0.000) were increased. QTpc decreased during hypomagnesemia (334 ± 28 vs. 342 ± 21, = 0.02). However, no significant differences were found in PR interval, QRS duration (85 ± 12 ms vs. 86 ± 12 ms, = 0.122) and ST-T segments between the patients and their own controls. In patients with isolated hypomagnesemia, P wave duration, QTc, Tpec, and Tpe/QT ratio suggesting atrial depolarization and ventricular repolarization dispersion were significantly increased compared with normal magnesium levels in the same patients after restoration to normal levels.</abstract><cop>Switzerland</cop><pub>Frontiers Media S.A</pub><pmid>33584338</pmid><doi>10.3389/fphys.2020.617374</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record>
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subjects electrocardiogram
Physiology
repolarization dispersion
serum magnesium
sudden cardiac death
ventricular arrhythmia
title The ECG Characteristics of Patients With Isolated Hypomagnesemia
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