Congestive heart failure develops if there is sufficient death of heart muscle (myocardial infarction) and subsequent inability of the remaining normal heart tissue to pump enough blood to the body. Tissues that die obviously cannot contract, but there are also areas around the infarction, called the peri-infacrtion area, that are in shock and may not be able to contract because blood flow to them is not sufficiently compromised to kill them. They may eventually recover if blood flow can be re-established.