Influence of mercury exposure on blood pressure, resting heart rate and heart rate variability in French Polynesians: a cross-sectional study
<p>Abstract</p> <p>Background</p> <p>Populations which diet is rich in seafood are highly exposed to contaminants such as mercury, which could affect cardiovascular risk factors</p> <p>Objective</p> <p>To assess the associations between mercury a...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2011-11-01
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| Series: | Environmental Health |
| Subjects: | |
| Online Access: | http://www.ehjournal.net/content/10/1/99 |
| _version_ | 1818369480652226560 |
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| author | Valera Beatriz Dewailly Éric Poirier Paul Counil Emilie Suhas Edouard |
| author_facet | Valera Beatriz Dewailly Éric Poirier Paul Counil Emilie Suhas Edouard |
| author_sort | Valera Beatriz |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>Populations which diet is rich in seafood are highly exposed to contaminants such as mercury, which could affect cardiovascular risk factors</p> <p>Objective</p> <p>To assess the associations between mercury and blood pressure (BP), resting heart rate (HR) and HR variability (HRV) among French Polynesians</p> <p>Methods</p> <p>Data were collected among 180 adults (≥ 18 years) and 101 teenagers (12-17 years). HRV was measured using a two-hour ambulatory electrocardiogram (Holter) and BP was measured using a standardized protocol. The association between mercury and HRV and BP parameters was studied using analysis of variance (ANOVA) and analysis of covariance (ANCOVA)</p> <p>Results</p> <p>Among teenagers, the high frequency (HF) decreased between the 2<sup>nd </sup>and 3<sup>rd </sup>tertile (380 vs. 204 ms<sup>2</sup>, p = 0.03) and a similar pattern was observed for the square root of the mean squared differences of successive R-R intervals (rMSSD) (43 vs. 30 ms, p = 0.005) after adjusting for confounders. In addition, the ratio low/high frequency (LF/HF) increased between the 2<sup>nd </sup>and 3<sup>rd </sup>tertile (2.3 vs. 3.0, p = 0.04). Among adults, the standard deviation of R-R intervals (SDNN) tended to decrease between the 1<sup>st </sup>and 2<sup>nd </sup>tertile (84 vs. 75 ms, p = 0.069) after adjusting for confounders. Furthermore, diastolic BP tended to increase between the 2<sup>nd </sup>and 3<sup>rd </sup>tertile (86 vs. 91 mm Hg, p = 0.09). No significant difference was observed in resting HR or pulse pressure (PP)</p> <p>Conclusions</p> <p>Mercury was associated with decreased HRV among French Polynesian teenagers while no significant association was observed with resting HR, BP, or PP among teenagers or adults</p> |
| first_indexed | 2024-12-13T23:24:31Z |
| format | Article |
| id | doaj.art-a95bac39cf46495b9022fa454a164db3 |
| institution | Directory Open Access Journal |
| issn | 1476-069X |
| language | English |
| last_indexed | 2024-12-13T23:24:31Z |
| publishDate | 2011-11-01 |
| publisher | BMC |
| record_format | Article |
| series | Environmental Health |
| spelling | doaj.art-a95bac39cf46495b9022fa454a164db32022-12-21T23:27:36ZengBMCEnvironmental Health1476-069X2011-11-011019910.1186/1476-069X-10-99Influence of mercury exposure on blood pressure, resting heart rate and heart rate variability in French Polynesians: a cross-sectional studyValera BeatrizDewailly ÉricPoirier PaulCounil EmilieSuhas Edouard<p>Abstract</p> <p>Background</p> <p>Populations which diet is rich in seafood are highly exposed to contaminants such as mercury, which could affect cardiovascular risk factors</p> <p>Objective</p> <p>To assess the associations between mercury and blood pressure (BP), resting heart rate (HR) and HR variability (HRV) among French Polynesians</p> <p>Methods</p> <p>Data were collected among 180 adults (≥ 18 years) and 101 teenagers (12-17 years). HRV was measured using a two-hour ambulatory electrocardiogram (Holter) and BP was measured using a standardized protocol. The association between mercury and HRV and BP parameters was studied using analysis of variance (ANOVA) and analysis of covariance (ANCOVA)</p> <p>Results</p> <p>Among teenagers, the high frequency (HF) decreased between the 2<sup>nd </sup>and 3<sup>rd </sup>tertile (380 vs. 204 ms<sup>2</sup>, p = 0.03) and a similar pattern was observed for the square root of the mean squared differences of successive R-R intervals (rMSSD) (43 vs. 30 ms, p = 0.005) after adjusting for confounders. In addition, the ratio low/high frequency (LF/HF) increased between the 2<sup>nd </sup>and 3<sup>rd </sup>tertile (2.3 vs. 3.0, p = 0.04). Among adults, the standard deviation of R-R intervals (SDNN) tended to decrease between the 1<sup>st </sup>and 2<sup>nd </sup>tertile (84 vs. 75 ms, p = 0.069) after adjusting for confounders. Furthermore, diastolic BP tended to increase between the 2<sup>nd </sup>and 3<sup>rd </sup>tertile (86 vs. 91 mm Hg, p = 0.09). No significant difference was observed in resting HR or pulse pressure (PP)</p> <p>Conclusions</p> <p>Mercury was associated with decreased HRV among French Polynesian teenagers while no significant association was observed with resting HR, BP, or PP among teenagers or adults</p>http://www.ehjournal.net/content/10/1/99Methymercuryblood pressureheart rate variabilityresting heart raten-3 fatty acidsFrench Polynesia |
| spellingShingle | Valera Beatriz Dewailly Éric Poirier Paul Counil Emilie Suhas Edouard Influence of mercury exposure on blood pressure, resting heart rate and heart rate variability in French Polynesians: a cross-sectional study Environmental Health Methymercury blood pressure heart rate variability resting heart rate n-3 fatty acids French Polynesia |
| title | Influence of mercury exposure on blood pressure, resting heart rate and heart rate variability in French Polynesians: a cross-sectional study |
| title_full | Influence of mercury exposure on blood pressure, resting heart rate and heart rate variability in French Polynesians: a cross-sectional study |
| title_fullStr | Influence of mercury exposure on blood pressure, resting heart rate and heart rate variability in French Polynesians: a cross-sectional study |
| title_full_unstemmed | Influence of mercury exposure on blood pressure, resting heart rate and heart rate variability in French Polynesians: a cross-sectional study |
| title_short | Influence of mercury exposure on blood pressure, resting heart rate and heart rate variability in French Polynesians: a cross-sectional study |
| title_sort | influence of mercury exposure on blood pressure resting heart rate and heart rate variability in french polynesians a cross sectional study |
| topic | Methymercury blood pressure heart rate variability resting heart rate n-3 fatty acids French Polynesia |
| url | http://www.ehjournal.net/content/10/1/99 |
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