14371942_The_Body_Clock__Meridian
[Time] 11:00 am - 1:00 pm [Function] Palpitations may be noticed during this time and the majority of heart attacks are said to occur during the late morning. This is not a time to place the heart under additional stress by exercising or being exposed to excessive heat. A good time for meeting, talking and eating, although joy and sadness may also occur. [Meridian] 
Heart
The Body Clock
Meridian