From April through August 1968, Eisenhower had 4 heart attacks and 14 cardiac arrests.
One of the most remarkable and fortunate things about all this is that although he was unconscious
a number of times his intellectual functions, memory, and recall and interest in current events
were not compromised. His energy reserve was low, however, so his activity was restricted to
three periods of 45 minutes out of bed each day. His morale and spirits were magnificent considering
all he had been through.
(Between his first infarction in 1955 and the April 1968 infarct, he had suffered
two additional infarcts. Thus, the August 1968 event was his seventh myocardial infarction.)