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The endogenous NOS inhibitor asymmetric dimethylarginine (ADMA) predicts LV mass independent of afterload

Citation

Sverdlov, AL and Ngo, DTM and Nightingale, AK and Rajendran, S and Mishra, K and Heresztyn, T and Ritchie, RH and Marwick, TH and Frenneaux, MP and Horowitz, JD, The endogenous NOS inhibitor asymmetric dimethylarginine (ADMA) predicts LV mass independent of afterload, Nitric Oxide, 25, (1) pp. 41-46. ISSN 1089-8603 (2011) [Refereed Article]

Copyright Statement

Copyright 2011 Published by Elsevier Inc

DOI: doi:10.1016/j.niox.2011.04.009

Abstract

Background Nitric oxide (NO) is a modulator of left ventricular hypertrophy (LVH) and myocardial relaxation. The impact of NO availability on development of LVH has never been demonstrated in humans. We tested the hypotheses that elevation of asymmetric dimethylarginine (ADMA) concentrations (biochemical marker of decreased NO generation), and impairment of vascular responsiveness to NO donor GTN, would each predict the presence of LVH and associated LV diastolic dysfunction in a normal aging population.
Methods and results In 74 subjects aged 68 6 years, LV volumes and mass indexed to height2.7 (LVMI) were calculated from cardiac MRI. Despite the absence of clinically-defined LVH, there was a relationship (r = 0.29; p = 0.01) between systolic BP and LVMI. Both elevation of ADMA levels to the highest quartile or impairment of GTN responsiveness (determined by applanation tonometry) to the lowest quartile were determinants of LVMI independent of systolic BP (p = 0.01 and p = 0.03, respectively). Filling pressure (E/E′ ratio from echocardiography) was increased in patients with impaired vascular NO responsiveness (p < 0.05) irrespective of LVMI. ADMA remained a significant determinant of LVMI on multivariate analysis.
Conclusions These data imply that NO bioavailability within the myocardium modulates earliest stages of LVH development and facilitates development of diastolic dysfunction at a given LV mass.

Item Details

Item Type:Refereed Article
Keywords:left ventricular mass, nitric oxide, vascular function, diastolic function, asymmetric dimethylarginine
Research Division:Medical and Health Sciences
Research Group:Cardiorespiratory Medicine and Haematology
Research Field:Cardiology (incl. Cardiovascular Diseases)
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Cardiovascular System and Diseases
Author:Marwick, TH (Professor Tom Marwick)
ID Code:90927
Year Published:2011
Web of Science® Times Cited:7
Deposited By:Menzies Institute for Medical Research
Deposited On:2014-05-01
Last Modified:2014-06-05
Downloads:0

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