List factors may be significantly longer and quite surprising .
Heart failure , for example . Appears to have seasonal and temporal pattens . A higher percentage of heart attack occur in cold weather , and more people experience heart failure on
Monday than on any other day of the week . In addition people are more susceptible to heart attacks in the first few hours after working . Cardiologists first a served this morning phenomenon In the mild - 1980 , and have since discovered a number
Of possible causes . An early - morning rise in blood pressure , heart rate , and concentration of heart stimulating hormones ,
Plus a reduction of blood flew to the heart , May all contribute to the higher incidence of heart attacks between the hours of
8.00 A.M. And 10.00 A.M.