Use of a multi‐stage exercise test to assess the responsiveness of rate‐adaptive pacemakers in dogs
| Autor: | M. Faena, P. G. G. Darke, K. Langford, L. Ferasin, S. M. Henderson |
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| Rok vydání: | 2005 |
| Předmět: |
Male
Pacemaker Artificial medicine.medical_specialty Ventricular rate Exercise Tolerance business.industry Cardiac Pacing Artificial Reproducibility of Results Sensitivity and Specificity Test (assessment) Multi stage Dogs Heart Block Internal medicine Exercise Test Cardiology Physical therapy Animals Medicine Female Dog Diseases Treadmill Small Animals business Motion sensors |
| Zdroj: | Journal of Small Animal Practice. 46:115-120 |
| ISSN: | 1748-5827 0022-4510 |
| Popis: | Objectives: To assess the ventricular rate response of rate-adaptive (VVIR) pacemakers in dogs using a multi-stage exercise test. Methods: The rate-responsiveness of VVIR pacemakers was assessed in seven dogs with complete atrioventricular (AV) block and implanted with various models of pulse generators (six motion sensors and one automatic dual-sensor rate-response pacemaker). Response activity was assessed with a multi-stage exercise test on a treadmill. Atrial and ventricular rate were analysed retrospectively at the end of the test and the AV ratio was calculated after each minute of exercise. Results: During exercise, the mean (sd) AV ratio recorded in all paced dogs was 1.7 (0.5) (expected physiological ratio 1.0), although a variety of individual performances was observed. A poor response (AV ratio 2.8 [0.2]) was obtained with the automatic dual-sensor pacemaker, suggesting that this type of rate-responsive device may not be indicated for implantation in dogs with complete AV block. The overall AV ratio for the six dogs implanted with motion sensors was 1.4 (0.2), showing a better performance of these pacemakers during exercise. Clinical Significance: This multi-stage exercise test represents an easy and repeatable method for assessing the accuracy of rate-responsive sensors and offers valuable information for the correct setting of VVIR pacemakers in dogs. |
| Databáze: | OpenAIRE |
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