Peer-reviewed veterinary case report
Heart rhythm problems in two dogs caused by too much thyroid medicine
By Fine, Deborah M et al.·Published in Journal of veterinary cardiology : the official journal of the European Society of Veterinary Cardiology·2010·Department of Veterinary Clinical Sciences, United States·View original on PubMed →
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Original publication title: Cardiovascular manifestations of iatrogenic hyperthyroidism in two dogs.
- Species:
- dog
Plain-English summary
Two dogs developed serious heart problems after receiving too much thyroid hormone treatment. They showed signs like rapid breathing, increased heart rate, and one even fainted. Both had existing heart issues that made their symptoms worse. Thankfully, after adjusting their thyroid medication, their heart rhythms returned to normal, and they felt better.
People also search for: dog rapid breathing · dog heart problems after thyroid treatment · dog fainting episodes · dog tachycardia treatment
Abstract
Two dogs were diagnosed with iatrogenic thyrotoxicosis (1 definitive, 1 presumptive). Both showed physical examination findings of agitation, tachypnea, and tachycardia. Sinus tachycardia with supraventricular ectopy was diagnosed in one case, and syncope and atrial flutter was present in the other. Both dogs had concurrent cardiac disease that might have contributed to the severity of their clinical signs. Excessive thyroid hormone supplementation in humans causes supraventricular arrhythmias including sinus tachycardia, supraventricular tachycardia, atrial fibrillation, and atrial flutter. Clinical signs and rhythm abnormalities resolved in both dogs with resolution of the thyrotoxicosis.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/20587373/