Why do most heart attacks happen in the morning?

Answer 1

Here is a simple answer:
Studies show the most common time for a heart attack to occur is Monday morning. Saturday morning ranks second. Another common time is during the early morning hours when the platelets are stickier.
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Answer 2

Statistics indicate most heart attacks happen in the morning. Dr Halle explains:
"In the early morning, there is a surge of chemicals called catacolamines or adrenaline-like substances and that is similar to ordinary stress that occurs just preparing a person the way the good lord rigged a person so that when they get up in the morning they have a surge of these hormones and that may provoke a heart attack. And you will therefore find that many people will have heart attacks in their sleep. And that will typically happen in the early morning hours, and I mean by that five or six in the morning. "

Answer 3

probably because after gettin up from a full nights rest where the hearts oxygen supply is low, upon wakenin and startin our daily activities our hearts oxygen demand increases and sometimes our bodies cant immediately compensate the increasing oxygen demands, so it leads to a heart attack.