Klinik für Kleintiere, Justus-Liebig University Giessen, Frankfurterstr. 126, D-35392 Giessen, Germany; e-mail: firstname.lastname@example.org.
Transthoracic Echocardiographic Measurement of Patent Ductus Arteriosus in Dogs
Article first published online: 5 FEB 2008
© 2007 American College of Veterinary Internal Medicine
Journal of Veterinary Internal Medicine
Volume 21, Issue 2, pages 251–257, March 2007
How to Cite
Schneider, M., Hildebrandt, N., Schweigl, T. and Wehner, M. (2007), Transthoracic Echocardiographic Measurement of Patent Ductus Arteriosus in Dogs. Journal of Veterinary Internal Medicine, 21: 251–257. doi: 10.1111/j.1939-1676.2007.tb02957.x
- Issue published online: 5 FEB 2008
- Article first published online: 5 FEB 2008
- Submitted May 6, 2006; Revised July 30, 2006; Accepted October 2, 2006.
- Interventional therapy;
- 2-dimensional echocardiography;
Background:Patent ductus arteriosus (PDA) size and morphology influence the selection of the kind and the size of the embolization device used to effect shunt closure.
Hypothesis:That echocardiographic measurement of PDA in dogs is accurate.
Animals:Forty-five client-owned dogs with PDA.
Methods:Prospective observational study. Echocardiographic and angiographic data were compared.
Results:Measurement of the ductus in color Doppler echocardiography (CD-E) and 2-dimensional echocardiography (2D-E) was achieved from left parasternal views in 43 of 45 unsedated dogs (96%). In these 43 dogs, the angiographic minimal PDA diameter was 3.72 ± 1.59 mm, and the diameter of the PDA ampulla was 8.46 ± 3.01 mm. The CD-E minimal PDA diameter ranged from 2.3 to 9.5 mm (median, 4.0 mm). There was a significant mean difference to the angiographic measurements (1.15 ± 0.95 mm; P < .0001). An agreement in a 1-mm range was found in 21 of 43 dogs (48%). The 2D-E minimal PDA diameter was 3.73 ± 1.78 mm, and the mean difference to the angiographic measurements was not significant (0.00 ± 0.72 mm; P= .98). An agreement in a 1-mm range was found in 31 of 43 dogs (72%). The 2D-E measurement of the PDA ampulla revealed a significant mean difference to the angiographic data (1.95 ± 2.43 mm, P < .0001). An agreement in a 2-mm range was found in 21 of 43 dogs (49%).
Conclusions and Clinical Importance: The 2D-E from the left cranial parasternal view is an excellent noninvasive method to estimate the PDA minimal diameter before doing catheter intervention.