Peer-reviewed veterinary case report
Dog developed dangerous heart rhythm after contrast dye during CT scan
By Tamogi, Haruka et al.·Published in The Journal of veterinary medical science·2020·Department of Veterinary Medicine, Japan·View original on PubMed →
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Original publication title: ST segment depression and ventricular fibrillation in a dog after contrast agent administration.
- Species:
- dog
Plain-English summary
An 11-year-old Toy Poodle experienced serious heart problems during a CT scan that used a contrast agent. Shortly after receiving the contrast, the dog's heart rate increased, and an abnormal heart rhythm called ventricular fibrillation developed, which can be life-threatening. Fortunately, the veterinary team was able to perform cardiopulmonary resuscitation (CPR) and restore the dog's heartbeat. The incident raised concerns about possible heart issues or an allergic reaction to the contrast agent. This case highlights the importance of monitoring heart activity closely when pets undergo procedures involving contrast agents.
People also search for: dog heart problems after anesthesia · Toy Poodle CPR · contrast agent side effects in dogs
Abstract
An 11-year-old Toy Poodle underwent a computed tomography examination with contrast (iohexol) enhancement under anesthesia. Heart rate and R-wave amplitude on electrocardiogram (ECG) increased 2.5 min after iohexol administration, and end-tidal carbon dioxide decreased to 12 mmHg. A progressive ST segment depression was observed on ECG. Subsequently, the ECG waveform changed to ventricular fibrillation. However, spontaneous circulation returned following cardiopulmonary resuscitation. Myocardial ischemia or anaphylactic shock was suspected in the dog, which explains the ST segment depression observed on ECG. When performing radiological examinations with a contrast agent, the ECG waveform changes, such as an increase in heart rate, R-wave amplitude, or ST segment depression, should be carefully monitored. This might enable early detection of cardiac dysfunction and the ensuing cardiac arrest in dogs.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/32963179/