Post on 16-Jul-2015
• 4 week old male entire Cavalier King Charles Spaniel
• Presented for investigation of heart murmur
Left ventricular dilatation Turbulent flow in pulmonary artery
Visualisation of PDA
• Important part of foetal circulation • Shunt between pulmonary trunk and aorta (RL)• Allows deoxygenated blood to bypass the lungs and
enter the aorta
• When first breath is taken: Aortic pressure increases Blood flows back into ductus arteriosus Ductus arteriosus pressure increases Walls of ductus arteriosus collapse Ductus arteriosus closes
• Left sided heart failure • LV dilatation and mitral regurgitation• LV myocardial failure• LA enlargement• Atrial fibrillation
• Maltese• Pomeranian • Shetland Sheepdog • English Springer Spaniel • Bichon frise• Poodle • Yorkshire Terrier • German Shepherd
• “triple knuckle” • Cardiomegaly • Distended pulmonary vessels • +/- pulmonary oedema
• Vascular occlusion coils
• Amplatz Canine Duct Occluder (ACDO)
• Furosemide
• Pimobendan
• (ACE inhibitors)
• (Spironolactone)
• Catheter passed via femoral artery aorta ductus arteriosus• Suitable size of occluder chosen • Occluder released in DA • Encourage embolus formation ductus occlusion• Referral procedure
• Left ventricular systolic dysfunction
• Cardiomegaly/enlarged chamber size
• Mitral regurgitation
o Confirmed CHF
o Age: > 2 years old?
o Weight: >23kg ?
• Methadone
• Meloxicam
• Synulox
• Frusemide
• Pimobendan