Acute effects of sex steroid hormones on susceptibility to cardiac arrhythmias: a simulation study.
Acute effects of sex steroid hormones likely contribute to the observation that post-pubescent males have shorter QT intervals than females. However, the specific role for hormones in modulating cardiac electrophysiological parameters and arrhythmia vulnerability is unclear. Here we use a computatio...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2010-01-01
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| Series: | PLoS Computational Biology |
| Online Access: | http://europepmc.org/articles/PMC2813260?pdf=render |
| _version_ | 1818330892386435072 |
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| author | Pei-Chi Yang Junko Kurokawa Tetsushi Furukawa Colleen E Clancy |
| author_facet | Pei-Chi Yang Junko Kurokawa Tetsushi Furukawa Colleen E Clancy |
| author_sort | Pei-Chi Yang |
| collection | DOAJ |
| description | Acute effects of sex steroid hormones likely contribute to the observation that post-pubescent males have shorter QT intervals than females. However, the specific role for hormones in modulating cardiac electrophysiological parameters and arrhythmia vulnerability is unclear. Here we use a computational modeling approach to incorporate experimentally measured effects of physiological concentrations of testosterone, estrogen and progesterone on cardiac ion channel targets. We then study the hormone effects on ventricular cell and tissue dynamics comprised of Faber-Rudy computational models. The "female" model predicts changes in action potential duration (APD) at different stages of the menstrual cycle that are consistent with clinically observed QT interval fluctuations. The "male" model predicts shortening of APD and QT interval at physiological testosterone concentrations. The model suggests increased susceptibility to drug-induced arrhythmia when estradiol levels are high, while testosterone and progesterone are apparently protective. Simulations predict the effects of sex steroid hormones on clinically observed QT intervals and reveal mechanisms of estrogen-mediated susceptibility to prolongation of QT interval. The simulations also indicate that acute effects of estrogen are not alone sufficient to cause arrhythmia triggers and explain the increased risk of females to Torsades de Pointes. Our results suggest that acute effects of sex steroid hormones on cardiac ion channels are sufficient to account for some aspects of gender specific susceptibility to long-QT linked arrhythmias. |
| first_indexed | 2024-12-13T13:11:10Z |
| format | Article |
| id | doaj.art-b40999636029409d925e6cc01484db31 |
| institution | Directory Open Access Journal |
| issn | 1553-734X 1553-7358 |
| language | English |
| last_indexed | 2024-12-13T13:11:10Z |
| publishDate | 2010-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS Computational Biology |
| spelling | doaj.art-b40999636029409d925e6cc01484db312022-12-21T23:44:42ZengPublic Library of Science (PLoS)PLoS Computational Biology1553-734X1553-73582010-01-0161e100065810.1371/journal.pcbi.1000658Acute effects of sex steroid hormones on susceptibility to cardiac arrhythmias: a simulation study.Pei-Chi YangJunko KurokawaTetsushi FurukawaColleen E ClancyAcute effects of sex steroid hormones likely contribute to the observation that post-pubescent males have shorter QT intervals than females. However, the specific role for hormones in modulating cardiac electrophysiological parameters and arrhythmia vulnerability is unclear. Here we use a computational modeling approach to incorporate experimentally measured effects of physiological concentrations of testosterone, estrogen and progesterone on cardiac ion channel targets. We then study the hormone effects on ventricular cell and tissue dynamics comprised of Faber-Rudy computational models. The "female" model predicts changes in action potential duration (APD) at different stages of the menstrual cycle that are consistent with clinically observed QT interval fluctuations. The "male" model predicts shortening of APD and QT interval at physiological testosterone concentrations. The model suggests increased susceptibility to drug-induced arrhythmia when estradiol levels are high, while testosterone and progesterone are apparently protective. Simulations predict the effects of sex steroid hormones on clinically observed QT intervals and reveal mechanisms of estrogen-mediated susceptibility to prolongation of QT interval. The simulations also indicate that acute effects of estrogen are not alone sufficient to cause arrhythmia triggers and explain the increased risk of females to Torsades de Pointes. Our results suggest that acute effects of sex steroid hormones on cardiac ion channels are sufficient to account for some aspects of gender specific susceptibility to long-QT linked arrhythmias.http://europepmc.org/articles/PMC2813260?pdf=render |
| spellingShingle | Pei-Chi Yang Junko Kurokawa Tetsushi Furukawa Colleen E Clancy Acute effects of sex steroid hormones on susceptibility to cardiac arrhythmias: a simulation study. PLoS Computational Biology |
| title | Acute effects of sex steroid hormones on susceptibility to cardiac arrhythmias: a simulation study. |
| title_full | Acute effects of sex steroid hormones on susceptibility to cardiac arrhythmias: a simulation study. |
| title_fullStr | Acute effects of sex steroid hormones on susceptibility to cardiac arrhythmias: a simulation study. |
| title_full_unstemmed | Acute effects of sex steroid hormones on susceptibility to cardiac arrhythmias: a simulation study. |
| title_short | Acute effects of sex steroid hormones on susceptibility to cardiac arrhythmias: a simulation study. |
| title_sort | acute effects of sex steroid hormones on susceptibility to cardiac arrhythmias a simulation study |
| url | http://europepmc.org/articles/PMC2813260?pdf=render |
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