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Education ?

Medical School
Universidad Nacional Autonoma De Mexico, Df (1977)
Foreign school

Awards & Distinctions ?

American Board of Obstetrics and Gynecology

Affiliations ?

Dr. Venegas is affiliated with 12 hospitals.

Hospital Affiliations



  • Methodist Dallas Medical Center
    3500 W Wheatland Rd, Dallas, TX 75237
    Top 25%
  • UT Southwestern University Hospital - St. Paul
    5909 Harry Hines Blvd, Dallas, TX 75235
    Top 25%
  • Methodist Medical Center
    1441 N Beckley Ave, Dallas, TX 75203
    Top 50%
  • Methodist Richardson Medical Center
    401 W Campbell Rd, Richardson, TX 75080
  • Parkland Health & Hospital System
    5201 Harry Hines Blvd, Dallas, TX 75235
  • UT Southwestern St Paul Hospital
  • University Hospital - St Paul
  • Healthsouth Surgery Center of Dallas
  • Life Care Hospital - Dallas
  • Dallas Methodist Physicians Network
  • Methodist Med Ctr, Dallas, Tx
  • Women's Specialty Center
  • Publications & Research

    Dr. Venegas has contributed to 6 publications.
    Title Zinc Supplementation and Growth of Infants Born Small for Gestational Age.
    Date September 1995
    Journal The Journal of Pediatrics

    To analyze the effect of zinc supplementation on postnatal growth of infants born small for gestational age, we selected 68 infants at birth and followed them monthly for 6 months. They were randomly assigned to a supplemented group (group S, n = 35) receiving 3 mg of Zn (acetate) per day, or to a placebo (group P, n = 33), in a double-blind study. Weight increments in group S were significantly higher than those in group P at 2 months (p < 0.003); z scores showed catch-up growth only in group S. Length increments were also greater in group S than in group P, ending at 6 months were 64.9 +/- 1.8 versus 63.4 +/- 3.5 cm (mean +/- SD; p < 0.01); changes in z scores for 6 months were -1.28 to -0.66 in group S and -1.43 to -1.47 in group P (p < 0.001). Weight-for-length improved similarly in both groups (z score, -2.2 to +0.2). The increase in weight-for-age was higher in group S girls (p < 0.034), ending at 6 months with -0.13 +/- 0.59, versus -0.52 +/- 0.62 in group S boys, -1.15 +/- 0.49 in group P girls, and -1.05 +/- 0.80 in group P boys (+/- SD). More infants in group P received cow milk-based formula before 4 months because of inadequate weight increments. An additive effect on weight increase was observed between Zn supplementation (p < 0.02), exclusive breast-feeding after 4 months of age (p < 0.001), and gender (p < 0.02). Plasma and hair Zn values showed a downward trend, less marked in group S than in group P. We conclude that Chilean infants born small for gestational age have better weight and linear growth during the first 6 months of life if they receive Zn supplementation.

    Title [bacterial Etiology of Acute Infantile Diarrhea in Autumn and Winter].
    Date August 1986
    Journal Revista Chilena De Pediatría
    Title [plasma Concentrations of Magnesium in Infants with Acute Diarrhea, Dehydration and Acidosis].
    Date August 1986
    Journal Revista Chilena De Pediatría
    Title Zinc and Copper in Hair and Plasma of Children with Chronic Diarrhea.
    Date November 1985
    Journal Acta Paediatrica Scandinavica

    Zinc and copper status was evaluated in nineteen children with chronic diarrhea. An intestinal biopsy suggested that eight of these patients had celiac disease and eleven suffered chronic diarrhea without malabsorption and had normal villi or minimal changes. They were studied for malabsorption and compared with two control groups consisting of nineteen healthy and eleven malnourished children. Plasma zinc was depressed in the celiac disease group when compared with the normal children, but was similar to that of the malnourished children. Hair zinc was also depressed for the chronic diarrhea groups (23.2 +/- 15.2 and 34.4 +/- 21.9 micrograms/g for those with or without malabsorption respectively, vs. 97.9 +/- 15.2 for the healthy group). Plasma and hair copper values were diminished in both groups with chronic diarrhea. A significant correlation was found between plasma carotene levels after oral carotene overload, and both plasma zinc and hair copper values (r = 0.62, p less than 0.01 and r = 0.56, p less than 0.05, respectively). There was also a significant correlation between plasma zinc and plasma protein (r = 0.54, p less than 0.05). Hair determinations seem to be more sensitive than plasma values to changes in zinc or copper status in chronic diarrhea. Chronic diarrhea in children is associated with lower levels of zinc and copper, especially when accompanied by malabsorption.

    Title [zinc and Copper Levels in Chilean Infants].
    Date May 1985
    Journal Archivos Latinoamericanos De Nutrición

    Zinc and copper levels were determined by atomic absorption spectrophotometry, in the hair and plasma of 81 Chilean infants of both sexes, comprised within an age range of two to 36 months, after routine clinical examination at a Peripheral Health Service. The children were eutrophic, free from chronic pathologies, and their birth weights were over 2,500 grams. The infants were distributed within seven age groups and the mineral levels found were correlated mainly with age and sex.

    Title [manometric, Histological and Histochemical Correlates in the Study of Megacolon in Children].
    Date March 1983
    Journal Revista Chilena De Pediatría

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