The sudden and unexpected death of a swimmer, with no involuntary drowning sequence, can be difficult to ascribe to a specific cause. The possibilities may include pre-existing organic cardiac disease, pre-existing cardiac electrical abnormalities, epilepsy, hypoxic<unk> , homicide and suicide. The diagnosis may have significant legal consequences. Careful recording of observed events can improve the chances of correct diagnosis. The victim of hypoxic<unk>  may have been seen to be hyperventilating before the dive, and typically the<unk>  will have occurred some time after immersion, often without surfacing, and usually close to the surface. The victim is subsequently found unconscious or dead at the bottom of the water. Accounts of witnesses may be useful in diagnosing the cause and in the resuscitation and treatment of survivors.
Freediving blackout
Bristol heart scandal
Breast cancer survivors' dragon boating
Telenursing
Carney's triad
Angor animi
Predimed
Garland's triad