Heterotopic implantation of a porcine bioprosthetic heart valve in a dog with aortic valve endocarditis

Heterotopic implantation of a porcine bioprosthetic heart valve in a dog with aortic valve endocarditis. Arai, S., Wright, B., D., Miyake, Y., Boon, J., A., & Orton, E., C. J Am Vet Med Assoc, 231(5):727-730, 2007.

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CASE DESCRIPTION: A 5-year-old male German Shepherd Dog was evaluated because of a 5-month history of progressive lethargy, weight loss, and heart failure. CLINICAL FINDINGS: On physical examination, bounding femoral pulses and systolic and diastolic murmurs were detected. Echocardiography revealed severe aortic valve insufficiency (AVI) and a large vegetative lesion on the aortic valve consistent with aortic valve endocarditis. The AVI velocity profile half-time was 130 milliseconds; the calculated peak systolic pressure gradient across the aortic valve was 64 mm Hg. Left ventricular diameter during diastole was 63.6 mm (predicted range, 40.2 to 42 mm) and during systole was 42.9 mm (predicted range, 25.4 to 27 mm). Systolic, diastolic, and mean arterial blood pressures were 120, 43, and 65 mm Hg, respectively. TREATMENT AND OUTCOME: To palliate severe AVI, the descending aorta was occluded (duration, 16.75 minutes) and heterotopic implantation of a porcine bioprosthetic heart valve in that vessel was performed. After surgery, systolic, diastolic, and mean arterial blood pressures were 115, 30, and 61 mm Hg, respectively, in the forelimb and 110, 62, and 77 mm Hg, respectively, in the hind limb. Within 6 months, the AVI velocity profile half-time had increased to 210 milliseconds, indicating diminished severity of AVI. After 24 months, the dog was able to engage in vigorous exercise; no pulmonary edema had developed since surgery. CLINICAL RELEVANCE: Heterotopic bioprosthetic heart valve implantation into the descending aorta during brief aortic occlusion appears feasible in dogs and may provide substantial palliation for dogs with severe AVI.

@article{
 title = {Heterotopic implantation of a porcine bioprosthetic heart valve in a dog with aortic valve endocarditis},
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 year = {2007},
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 keywords = {Animals,Aortic Valve/*transplantation,Blood Pressure/physiology,Dog Diseases/*surgery,Dogs,Endocarditis/surgery/*veterinary,Heart Valve Diseases/surgery/*veterinary,Male,Swine,Treatment Outcome},
 pages = {727-730},
 volume = {231},
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 notes = {<m:note>Arai, Shiori<m:linebreak/>Wright, Bonnie D<m:linebreak/>Miyake, Yukari<m:linebreak/>Boon, June A<m:linebreak/>Orton, E Christopher<m:linebreak/>Case Reports<m:linebreak/>United States<m:linebreak/>Journal of the American Veterinary Medical Association<m:linebreak/>J Am Vet Med Assoc. 2007 Sep 1;231(5):727-30.</m:note>},
 abstract = {CASE DESCRIPTION: A 5-year-old male German Shepherd Dog was evaluated because of a 5-month history of progressive lethargy, weight loss, and heart failure. CLINICAL FINDINGS: On physical examination, bounding femoral pulses and systolic and diastolic murmurs were detected. Echocardiography revealed severe aortic valve insufficiency (AVI) and a large vegetative lesion on the aortic valve consistent with aortic valve endocarditis. The AVI velocity profile half-time was 130 milliseconds; the calculated peak systolic pressure gradient across the aortic valve was 64 mm Hg. Left ventricular diameter during diastole was 63.6 mm (predicted range, 40.2 to 42 mm) and during systole was 42.9 mm (predicted range, 25.4 to 27 mm). Systolic, diastolic, and mean arterial blood pressures were 120, 43, and 65 mm Hg, respectively. TREATMENT AND OUTCOME: To palliate severe AVI, the descending aorta was occluded (duration, 16.75 minutes) and heterotopic implantation of a porcine bioprosthetic heart valve in that vessel was performed. After surgery, systolic, diastolic, and mean arterial blood pressures were 115, 30, and 61 mm Hg, respectively, in the forelimb and 110, 62, and 77 mm Hg, respectively, in the hind limb. Within 6 months, the AVI velocity profile half-time had increased to 210 milliseconds, indicating diminished severity of AVI. After 24 months, the dog was able to engage in vigorous exercise; no pulmonary edema had developed since surgery. CLINICAL RELEVANCE: Heterotopic bioprosthetic heart valve implantation into the descending aorta during brief aortic occlusion appears feasible in dogs and may provide substantial palliation for dogs with severe AVI.},
 bibtype = {article},
 author = {Arai, S and Wright, B D and Miyake, Y and Boon, J A and Orton, E C},
 journal = {J Am Vet Med Assoc},
 number = {5}
}

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