Congenital Heart Disease: Patent Ductus Arteriosus

Question 1

Precordial thrill

Answer 1

a vibration of the chest wall

Question 2

What is due to the failure of the ductus arteriosus to close after parturition

Answer 2

Patent Ductus Arteriosus (PDA)

Question 3

When does the Ductus arteriosus normally close?

Answer 3

The first 12 to 24 hours of life

Question 4

What happens if the ductus arteriosus remains open?

Answer 4

Blood is shunted from the aorta to the pulmonary artery and back to the lungs

Question 5

What happens eventually with a patient that has a PDA?

Answer 5

The lungs become volume overloaded. Blood will hyperperfusion the lungs and the left side will become volume overloaded

Question 6

What kind of murmur is heard in a patient with PDA?

Answer 6

Machinery murmur

Question 7

What normally happens during fetal development?

Answer 7

The ductus carries blood from the pulmonary artery to the aorta during fetal development

Question 8

What are the clinical signs and popular signalment of PDA?

Answer 8

Young female dogs
Loud murmur over the left thorax
May be asymptomatic

Question 9

How do you diagnose PDA?

Answer 9

Auscultation

ECG/Echocardiography

Question 10

What will you see on an echo?

Answer 10

Left ventricular dilation

Dilation of the aorta and pulmonary artery

Question 11

What is the treatment for PDA?

Answer 11

Surgical duct ligation

Coil or Amplatz embolization

Question 12

What is the prognosis of patients with PDA?

Answer 12

Excellent with surgical correction

Question 13

What percentage of dogs with PDA will die without surgical correction?

Answer 13

64% will die in a year