Myocardial Infarction

Myocardial Infarction

“A complete obstruction to blood flow in a coronary artery may result in a myocardial infarction, commonly called a heart attack”(G.Tortora 2010). Infarction means death of an area of tissue because of interrupted blood supply. Because the heart tissue distal to the obstruction dies and is replaced by noncontractile scar tissue, the heart muscle loses some of its strength. Depending on the size and the location of the affected area. An infarction will cause disruption to the conduction system of the heart and possible death by triggering ventricular fibrillation.

“ Treatment for the myocardial infarction may involve an injection of a thrombolytic medication”(G. tortora2010). Also, and anticoagulant or evening performing a coronary angioplasty or coronary bypass grafting. Fortunately, heart muscle can remain alive in a resting person if it receives as little as 10-15% of its normal supply.

Congestive Heart Failure(CHF)

“In congestive Heart Failure , there is a loss of the pumping efficiency by the heart”(G.Tortora2010).” Causes of CHF include: CAD, Congenital defects, long-term high blood pressure ,and Myocardial Infarction”(G. Tortora2010). “ As the pump becomes less effective, more blood remains in the ventricles at the end of each cycle. And gradually the end diastolic volume increases. The increasing of the preload may promote an increased force of contraction.

“ Often, one side of the heart starts to fail before other. If the left ventricle fails first, it can’t pump in the lungs and causes pulmonary edema, fluid accumulation in the lungs that can cause suffocation if left is untreated”(G. Tortora2010). If the right ventricle fails first , blood then backs up the systemic veins and over time , the kidneys cause an increase in blood volume . In many cases, the resulting peripheral edema usually is most