Halogenated hydrocarbons such as trichloroethylene (TCE) are among the most common water supply contaminants in the United States and abroad. Epidemiologic studies have found an association but not a cause-and-effect relation between halogenated hydrocarbon contamination and increased incidence of congenital cardiac malformations or other defective birth outcomes. Avian and rat studies demonstrated statistically significant increases in the number of congenital cardiac malformations in those treated with high doses of TCE, either via intrauterine pump or in maternal drinking water, compared with controls. This study attempts to determine if there is a threshold dose exposure to TCE above which the developing heart is more likely to be affected. Sprague-Dawley rats were randomly placed in test groups and exposed to various concentrations of TCE (2.5 ppb, 250 ppb, 1.5 ppm, 1,100 ppm) in drinking water or distilled water (control group) throughout pregnancy. The percentage of abnormal hearts in the treated groups ranged from 0 to 10.48%, with controls having 2.1% abnormal hearts, and the number of litters with fetuses with abnormal hearts ranged from 0 to 66.7%, and the control percentage was 16.4%. The data from this study indicate not only that there is a statistically significant probability overall of a dose response to increasing levels of TCE exposure, but also that this trend begins to manifest at relatively low levels of exposure (i.e., < 250 ppb). Maternal rats exposed to more than this level of TCE during pregnancy showed an associated increased incidence of cardiac malformations in their developing rat fetuses.
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http://dx.doi.org/10.1289/ehp.5125 | DOI Listing |
Int J Gynecol Cancer
January 2025
Hacettepe University, Department of Obstetrics and Gynecology, Division of Gynecologic Oncology, Faculty of Medicine, Ankara, Turkey.
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View Article and Find Full Text PDFCureus
December 2024
University of Florida Health Congenital Heart Center, University of Florida College of Medicine, Gainesville, USA.
Anomalous aortic origin of a coronary artery (AAOCA) comprises a set of rare congenital abnormalities in the origin or path of the coronary arteries with highly variable clinical implications. This is a pilot feasibility study where we investigated the influence of the anomalous coronary artery inlet architecture on coronary perfusion using coronary blood flow computational simulations to help predict the risk for coronary ischemia in patients with anomalous aortic origin of the right coronary artery (AAORCA) with these types of anomalous coronary artery inlet architectures. We developed a protocol for generating 3D models of patient coronary artery anatomies from an IRB-approved dataset of cardiac CT images of patients with AAORCA at our institution.
View Article and Find Full Text PDFNaxos disease is a rare autosomal recessive condition combining arrhythmogenic right ventricular cardiomyopathy, woolly hair, and palmoplantar keratoderma. The first identified causative variant was in the gene encoding the desmosomal protein plakoglobin. Naxos disease exhibits fibro-fatty myocardial replacement with immunohistological abnormalities in cardiac protein and signaling pathways, highlighting the role of inflammation and potential anti-inflammatory treatments.
View Article and Find Full Text PDFMalawi Med J
January 2025
Department of Paediatrics, College of Medicine, University of Nigeria Ituku/Ozalla and University of Nigeria Teaching Hospital Ituku/Ozalla, Enugu, Enugu State, Nigeria.
Background: Children with Tetralogy of Fallot (TOF) usually present with right heart abnormalities, however much is not known if these children presents with left ventricular dysfunction.
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Echocardiography
February 2025
Department of Echocardiography, Heart Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.
We reported a 3-year-old girl with cyanosis. The patient was diagnosed with an obstructive Chiari network, which is an unrecognized cause of cyanosis. Echocardiography was used to diagnose this disease and provide additional information on flow and pressure gradients.
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