Hi Debbie – Thanks for posting! This has been a hot topic as of late. Chemicals that are believed to cause disruption in the thyroid gland include chemicals like PCBs and BPT, as well as pesticides like DDT.
This is a link to a recent statement from The Endocrine Society on the subject:
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http://www.endo-society.org/journals/scientificstatements/upload/edc_scientific_statement.pdf
Hope that all goes well with the cardiologist – definitely keep us posted!