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Acute Experimental Hyperthyroidism Does Not Affect Basal and Volume-Induced Atrial Natriuretic Peptide Secretion in Healthy Subjects
Joint Authors
Simeonidis, Nikolaos
Triposkiadis, Filippos
Stathogiannis, Evangelos
Koukoulis, George N.
Pappas, Dimitrios
Giamouzis, Gregory
Source
Cardiology Research and Practice
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2010-12-05
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
Background.
Excess circulating thyroid hormones are associated with increased cardiac atrial natriuretic peptide (ANP) secretion but the exact mechanisms involved have not been fully elucidated in vivo.
Methods.
To examine whether thyroid hormone regulation of ANP secretion is the result of a direct action on the myocardium and/or of an indirect action through alterations in the peripheral circulation, plasma ANP levels (baseline and volume expansion-induced) were evaluated in 14 healthy men, before and after triiodothyronine (T3) administration.
Results.
T3 administration was followed by a significant increase in serum T3 levels and a significant decrease in serum TSH levels, without significantly affecting ANP levels.
Systemic vascular resistance, plasma rennin activity (PRA), and aldosterone (ALDO) levels, as well as indices of left atrial function, were not significantly altered, despite a significant increase in cardiac output.
Plasma volume expansion, induced by a 1500 ml normal saline (NSal) infusion, both before and after T3 administration, was followed by a significant decrease in PRA and ALDO and a significant increase in plasma ANP levels, without significantly affecting the mean blood pressure (BP) and heart rate (HR) in each study period.
The NSal-induced response, measured as the integrated area under the curve corrected for baseline values (-AUC), was not different after T3 administration for ANP, ALDO, PRA, HR, and mean BP.
Conclusion.
In vivo thyroid hormone-induced myocardial ANP secretion is the result of an indirect action mainly through hemodynamic changes that increase atrial stretch.
American Psychological Association (APA)
Giamouzis, Gregory& Pappas, Dimitrios& Simeonidis, Nikolaos& Stathogiannis, Evangelos& Triposkiadis, Filippos& Koukoulis, George N.. 2010. Acute Experimental Hyperthyroidism Does Not Affect Basal and Volume-Induced Atrial Natriuretic Peptide Secretion in Healthy Subjects. Cardiology Research and Practice،Vol. 2011, no. 2011, pp.1-6.
https://search.emarefa.net/detail/BIM-467620
Modern Language Association (MLA)
Giamouzis, Gregory…[et al.]. Acute Experimental Hyperthyroidism Does Not Affect Basal and Volume-Induced Atrial Natriuretic Peptide Secretion in Healthy Subjects. Cardiology Research and Practice No. 2011 (2011), pp.1-6.
https://search.emarefa.net/detail/BIM-467620
American Medical Association (AMA)
Giamouzis, Gregory& Pappas, Dimitrios& Simeonidis, Nikolaos& Stathogiannis, Evangelos& Triposkiadis, Filippos& Koukoulis, George N.. Acute Experimental Hyperthyroidism Does Not Affect Basal and Volume-Induced Atrial Natriuretic Peptide Secretion in Healthy Subjects. Cardiology Research and Practice. 2010. Vol. 2011, no. 2011, pp.1-6.
https://search.emarefa.net/detail/BIM-467620
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-467620