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Ductal morphology grouped according to the Miller classification system in dogs and cats
| Ductal morphology | Dogs | Cats |
|---|---|---|
| IIa | 2 | — |
| IIb | 9 | 1 |
| III | 15 | 2 |
| Unavailable a | 17 | — |
Unable to access echo to confirm patent ductus arteriosus (PDA) morphology (n = 8), PDA not visualized at the time of echo (n = 7), and poor‐quality image of the ductus (n = 2).
