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Restrição materna de polifenóis e dinâmica ductal fetal na gestação normal: Um ensaio clínico aberto

Volume 101, Issue 3, September 2013, Pages 217-225
Open Access

Maternal restriction of polyphenols and fetal ductal dynamics in normal pregnancy: An open clinical trial  (Article)

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Instituto de Cardiologia, Fundação Universitária de Cardiologia, Porto Alegre, RS, Brazil 

Abstract

Background: We have recently demonstrated reversal of fetal ductal constriction after dietary maternal restriction of polyphenol-rich foods (PRF), due to its inhibitory action on prostaglandin synthesis.Objective: To test the hyphotesis that normal third trimester fetuses also improve ductus arteriosus dynamics after maternal restriction of polyphenols.Methods: Open clinical trial with 46 fetuses with gestational age (GA) ≥ 28 weeks submitted to 2 Doppler echocardiographic studies with an interval of at least 2 weeks, being the examiners blinded to maternal dietary habits. A validated food frequency questionnaire was applied and a diet based on polyphenol-poor foods (<30mg/100mg) was recommended. A control group of 26 third trimester fetuses was submitted to the same protocol. Statistics used t test for independent samples.Results: Mean GA was 33±2 weeks. Mean daily maternal estimated polyphenol intake (DMPI) was 1277mg, decreasing to 126mg after dietary orientation (p=0.0001). Significant decreases in systolic (SDV) and diastolic (DDV) ductal velocities, and RV/LV diameters ratio, as well as increase in ductal PI were observed [DSV=1.2±0.4m/s (0.7-1.6) to 0.9±0.3m/s (0.6-1.3) (p=0.018); DDV=0.21±0.09m/s (0.15-0.32) to 0.18±0.06m/s (0.11-0.25) (p=0.016); RV/LV ratio =1.3±0.2 (0.9-1.4) to 1.1±0.2 (0.8-1.3) (p=0.004); ductal PI=2.2±0.03 (2.0-2.7) to 2.4±0.4(2.2-2.9) (p=0.04)]. In the control group, with GA of 32±4 weeks, there were no significant differences in DMPI, mean SDV, DDV, PI and RV/LV ratio.Conclusion: The oriented restriction of third trimester maternal ingestion of polyphenol-rich foods for a period of 2 weeks or more improve fetal ductus arteriosus flow dynamics and right ventricular dimensions.

Author keywords

Anti-inflammatory agents; Constriction; Ductus arteriosus; Fetal heart; Polyphenols / pharmacology; Pregnancy; Prostaglandins

Indexed keywords

EMTREE drug terms: polyphenol
EMTREE medical terms: article; clinical trial; controlled study; diet restriction; Doppler echocardiography; ductus arteriosus; female; fetus; fetus heart; food frequency questionnaire; food intake; gestational age; heart ventricle size; human; nutritional assessment; open study; pregnancy; questionnaire; third trimester pregnancy
MeSH: Ductus Arteriosus; Echocardiography, Doppler; Female; Fetus; Food; Food Habits; Humans; Maternal Nutritional Physiological Phenomena; Polyphenols; Pregnancy; Pregnancy Trimester, Third; Prostaglandins; Time Factors
Medline is the source for the MeSH terms of this document.
Chemicals and CAS Registry Numbers: polyphenol, 37331-26-3
ISSN: 0066782X CODEN: ABCAASource Type: Journal Original language: English, Portuguese
DOI: 10.5935/abc.20130166 PubMed ID: 23949325Document Type: Article

  Zielinsky, P.; Av. Princesa Isabel, 370, Santana. Postal Code 90620-000, Porto Alegre, RS, Brazil; email:zielinsky.pesquisa@gmail.com
© Copyright 2013 Elsevier B.V., All rights reserved.