Congenital heart defects affect a small proportion of cats. Understanding common conditions, their welfare implications, and management options enables informed decisions for affected individuals.
Congenital heart disease welfare spans the spectrum from inconsequential to life-limiting. A cat with a small VSD that never causes clinical signs experiences no cardiac welfare deficit despite the anatomical defect. A cat with a large VSD or significant PDA experiences the exercise intolerance, respiratory compromise, and cardiac failure symptoms that constitute real welfare harm. The welfare-positive response to congenital cardiac disease begins with accurate echocardiographic assessment — the severity of the defect determines the prognosis and management approach. Surgically correctable defects like PDA have excellent outcomes when treated promptly. Long-term monitoring and eventual pharmacological management extend comfortable lives in cats with slowly progressive defects.