Abstract
ABSTRACTBackground: Invasive electrophysiology study (EPS) is one of the most important adjunct tests for the evaluation of arrhythmias in human medicine. However, EPS is neither well known nor widely used in veterinary medicine.Objective: To define the values for intracardiac conduction parameters determined during invasive EPS in dogs.Animals and methods: The study included 16 admitted dogs of various breeds, sex and ages and 6 control Beagles. In the Beagles, EPS was performed twice at 6-month intervals in order to verify the reproducibility of the results. Results: No significant differences were found between the results of the baseline and repeated EPS performed in the Beagles. We found retrograde conduction in 13 (59%) out of 22 dogs and including 4 (31%) animals with concomitant ‘jumps’ in the atrioventricular node conduction curve, pointing to the presence of dual conduction in this node. The mean values of the AV and retrograde VA Wenckebach points equaled to 220 and 360 ms, respectively, suggesting that the capability of the descending route is higher than that of the ascending route.Conclusion: The values determined in this study may be helpful in early detection of abnormalities in the electrical conduction system of the heart.
Highlights
Invasive electrophysiology study (EPS) is one of the adjunct tests performed routinely in humans with arrhythmia
The progress in veterinary cardiology is reflected by a growing demand for additional diagnostic tests that might be a useful tool in patients with a suspected arrhythmia in whom routine, widely available procedures, such as resting electrocardiography, Holter electrocardiography, or long-term monitoring with a loop recorder, proved insufficient
We examined 22 dogs of various breeds (6 Beagles, 12 crossbreeds, 1 German Shepherd, 1 Munsterlander, 1 Golden Retriever, 1 Fox Terrier), sex (15 females and 7 males), and body weight (6.7–31 kg, mean 16.1 § 8.9 kg)
Summary
Invasive electrophysiology study (EPS) is one of the adjunct tests performed routinely in humans with arrhythmia. Due the aforementioned factors, EPS is not routinely performed in animals with a suspected arrhythmia. The progress in veterinary cardiology is reflected by a growing demand for additional diagnostic tests that might be a useful tool in patients with a suspected arrhythmia in whom routine, widely available procedures, such as resting electrocardiography, Holter electrocardiography, or long-term monitoring with a loop recorder, proved insufficient. Invasive electrophysiology study (EPS) is one of the most important adjunct tests for the evaluation of arrhythmias in human medicine. Objective: To define the values for intracardiac conduction parameters determined during invasive EPS in dogs. Conclusion: The values determined in this study may be helpful in early detection of abnormalities in the electrical conduction system of the heart
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