In this report we describe the case of a 42-year-old woman who experienced an 
episode of near drowning during recreational swimming. A diagnosis of 
Andersen-Tawil syndrome was made based on the patient's dysmorphic features, 
characteristic T-U-wave patterns and ventricular arrhythmias. To our knowledge, 
this is the first report of a swimming-triggered cardiac event in a patient with 
Andersen-Tawil syndrome.