Why there are more cases of heart attack in the morning and in toilet ?

Is there any significance between heart attack and morning.


As we get to hear of many cases where people have heart attack early morning or strange but true when person using the toilet in the morning. Is there any relation?Why there are more cases of heart attack in the morning and in toilet ?
A doc I know just told me there's a theory going around that they think one possible reason for attacks in the early AM are that people are 'dry' dehydrated from a long slumber, and not replacing fluids. Makes sense, cause alot do happen early AM. Also, alot of people pass out on the pot, but look up 'vagal response' somewhere, it may explain it to you. It's where the vagus nerve gets stimulated, and drops the heart rate and B/P and that causes people topass out. Also the same thing can happen to people 'who see blood and pass out' 'have pain and pass out' 'pass out from something stressful.'Why there are more cases of heart attack in the morning and in toilet ?
For some people, straining while they poop puts a burden on the heart. Also, early in the morning the platelets are ';stickier.';
basically it's somewhat preexisting, enzymes in the blood vessels cause a clot to be on the verge of turning loose and acidosis has built up overnite because of the slowed metabolism and diminished pulmonary function, then the strain on the throne raises the blood pressure, the clot breaks loose and that's it
It generally happens with person having constipation. In the toilet they exert more pressure to get the motion and a that time they get the heart attack.