Transcatheter Atrial Septal Defect Closure with the AMPLATZER ® Atrial Septal Occluder in 13 Dogs: Short- and Mid-Term Outcome

ArticleinJournal of Veterinary Internal Medicine 23(5):995-1002 · September 2009with25 Reads
DOI: 10.1111/j.1939-1676.2009.0365.x · Source: PubMed
Abstract
Transcatheter atrial septal defect (ASD) closure in the dog was first reported in 2005. Describe the technique and both short- and mid-term outcome of transcatheter ASD closure with the Amplatzer atrial septal occluder (ASO). Thirteen client-owned dogs with ASD. Records of the initial 13 dogs in which transcatheter ASD closure was attempted at Texas A&M University were reviewed. All dogs had hemodynamically relevant septum secundum ASD. Two dogs had concurrent congenital abnormalities. ASOs were deployed in 13 dogs and released in 12. Eleven were released by a right jugular approach and 1 by a transatrial approach through a right lateral thoracotomy. Transthoracic echocardiographic estimates of ASD size were 14.0 + or - 5.4 mm (mean + or - 1 standard deviation) with a range of 7-22 mm. Accidental right atrial release occurred in 1 dog and embolization after release occurred in 2 dogs. Transcatheter ASD closure was successful in 10 dogs. Transthoracic color Doppler echocardiography the day after ASD closure indicated complete occlusion in 5 dogs, trivial to mild residual shunting in 4 dogs, and moderate residual shunting in 1 dog. Follow-up echocardiograms (mean of 12.4 + or - 7.4 months postprocedure) were available for 9 dogs. There was no residual ASD shunting in 6 dogs. In 3 of the 5 dogs with postoperative residual shunting it was judged to be decreased and hemodynamically unimportant relative to the dogs' postoperative evaluations. The mean length of event-free survival in the 10 dogs that underwent successful transcatheter ASD closure was 22.2 + or - 10.2 months.
    • "The role of L-R shunting from ASD might in part be beneficial to reduce the LA volume and pressure overload , however, it could cause the worsening of pulmonary hypertension leading to right sided heart failure later in time. Transcatheter atrial septal defect closure with Amplatzer atrial septal occlude has been documented in dogs [9], we could not attempt because of pre-existing severe pulmonary hypertension in our case. In conclusion, this case describes a rare case of acquired ASD due to complication of DMVD in a dog. "
    Full-text · Article · Sep 2014
    • "For some secundumtype ASDs, an Amplatzer device can be an alternative to close the defect. Amplatzer devices can be deployed by a right jugular or a transatrial approach through a right lateral thoracotomy [29] . Transcatheter ASD closure was successful in 10/13 dogs. "
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