If symptomatic bradycardia goes untreated, it could lead to death, but that's easy enough to prevent–just go see your doctor.

The team "strongly recommends" electrocardiogram (ECG) monitoring of all such patients to look for the development of atrioventricular block and symptomatic bradycardia.

Cardiac arrhythmia, bradycardia or other serious symptoms were not observed during the process of hypothermia.