Antiphospholipid syndrome leading to myocardial infarction in a Fontan patient 17 years after Norwood palliation.

Appropriate regimens for anticoagulation in the single ventricle population remain controversial and are usually based on individual practitioners' preferences. We present the case of a patient with a history of hypoplastic left heart syndrome and Norwood palliation who presented at 17 years of age with an acute myocardial infarction and a new diagnosis of antiphospholipid syndrome.