Doc Daneeka would never go swimming again; a person could swoon or suffer a mild coronary occlusion in an inch or two of water and drown to death, be carried out to sea by an undertow, or made vulnerable to poliomyelitis or meningococcus infection through chilling or over-exertion.
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The most common form of heart attack is from a clot that occludes one of the coronary arteries.
Only the fact that I was too young for a coronary occlusion saved my heart, which stopped beating for critical seconds.