Canine arrhythmia (atrial fibrillation) is a serious condition in which the heart beats irregularly. It is important to work with your veterinarian to choose a tailored management plan.





| Item | BEST 1 (Supplement) | BEST 2 (Combination product) | BEST 3 (Dietary product) |
|---|---|---|---|
| Main ingredients | L-carnitine, CoQ10 | Magnesium, Potassium, Vitamin B1 | Omega-3, Antioxidants, Sodium regulation |
| Main effects | Cardiac nutritional support | Cardiac nutritional support | Nutritional support related to blood flow and inflammation |
| Administration method | 1 tablet per day (oral) | 1 tablet per day (oral) | Mixed into meals (dietary product) |
| Recommended timing | Supportive nutritional management | Adjunct to drug therapy | Long-term nutritional management |
Supplements and diets are only supportive measures; atrial fibrillation must be managed with antiarrhythmic treatment prescribed by a veterinarian. Check for possible drug interactions and always consult a veterinarian before choosing.
Caution: Potential for Drug Interactions
Dog arrhythmia management products can be used alongside medications prescribed by a veterinarian, but interactions may occur. In particular, products containing heart rhythm regulators and multiple ingredients can cause excessive reactions. Always consult your veterinarian before use and share your pet’s medication history.


A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.
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[1] Meurs KM. Genetics of Cardiac Disease in the Small Animal Patient. Vet Clin Small Anim Pract, 2010, 40:701–715.
[2] Textbook of Cardiovascular Medicine in Dogs and Cats. 2nd ed. Elsevier, 2018.
[3] Small Animal Critical Care Medicine, 3rd ed. Elsevier, 2020.