Felis ISSN 2398-2950

Heart: tetralogy of fallot

Contributor(s): Serena Brownlie, Phil Fox, Penny Watson, Liz Bode

Introduction

  • About 6% of feline congenital heart defects.
  • Cause: combination of defects - pulmonic stenosis, high ventricular septal defect (VSD), dextroposition/overriding aorta; plus right ventricular hypertrophy (physiological response).
  • Signs: usually stunted and cyanotic.
  • If pulmonic stenosis is mild and VSD is left-to-right shunting, patient less severely compromised ('Pink tetralogy').
  • Diagnosis: radiographic signs of right-sided enlargement, cardiac murmur, echocardiography.
  • Treatment: none/medical therapy/cardiac surgery, depends on severity.
  • Prognosis: poor to grave.

Pathogenesis

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Diagnosis

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Treatment

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Prevention

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Outcomes

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Further Reading

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