Food Poisoning and Heart Attack, Any Relationship?

im a n older guy and an exersize freak running 4 to 5 miles daily before breakfast, believe in holistic aproach, until 19 weeks ago, when first heart attack occurred in the am controlled by nitro, second problem came 17 weeks ago.which resulted in quadruple bypass surgery same day.slow but steadilly improving rehab until three weeks ago after buffet meal( fried fish ) which caused diarrea and sweating around 5 am and need to vomit, laid on bathroom floor for a while blood pressure chek by emt showed 201 over 123,( in preceding weeks and several hours before ambulance arrived ave blood pressure aroun 120 over 72 ) giuven nitro on rout to er and a patch on arrival to continue the process,eventually admitted, blood tests confirming this stress caused a third heart attack ( im guessing ) this diagnosis has not been confirmed. given angiogram and told i need a defibrilator and to commence medical management to control BP.no further surgery has taken place and no drugs have been purchased
since discharge from hospital BP is around 120 over 72 but am scared to do anything to elevate in case my system puts me out again.