RedactedNarrative: Operator of Vessel A was using an electric motor on a kayak.  Operator of Vessel A stopped the motor and capsized the kayak.  Operator of Vessel A had a heart condition that was aggravated by being thrown into the water and struggling to swim for life jacket (which was not worn at the time of the capsizing) and attempting to get the boat upright. Operator of Vessel A was transported to the hospital for an aggravation of his heart condition as a result of the capsizing.