I hope that the captain who suffered the heart attack makes a speedy recovery.
Incidentally, it may be of interst to note that it was thought that the primary cause of Capt Key's incapacitation during the Staines Trident 'Papa India' accident stemmed from stress induced by serious arguments with colleagues over industrial relations in the company immediately prior to flight.
An unhappy and demoralised work force is more likely to have a serious in flight incident than one a work force which enjoys harmonious relations with the company. It seems that some people can't understand this....