At the beginning of the 20 th century, cardiovascular diseases accounted for less than 10% of the deaths in the world. At the end of that century, that group of diseases accounted for approximately half of the deaths in the developed countries and 25% of the deaths in developing countries. In 2020, cardiovascular diseases are estimated to ount for 25 million deaths per year, and ischemic heart diseases will surpass infectious diseases as the first cause of death in the world 1 .In Brazil, cardiovascular diseases lead the causes of death and hospitalization, accounting for 32.6% of the deaths with a determined cause. From 1996 to 1999, cardiovascular diseases accounted for 9% of the hospitalizations via SUS (Sistema Único de Saúde -the Brazilian public health system), being the major cause of hospitalization in the population aged 40 to 59 years (17%) and in the population aged 60 or above (29%). Ischemic cardiac diseases accounted for 29.6% of the deaths due to cardiovascular diseases, the mean mortality rate of this group of diseases being 46.4 deaths per 100,000 inhabitants/year in the period 2 .Mortality due to ischemic heart diseases varies widely among countries and among regions in the same country. Recent data from the MONICA Project 3 relative to a 10-year period of study with 37 different populations indicate a reduction in ischemic cardiac events and related mortality rates in most countries. Multiple aspects have contributed to this favorable tendency, including the reduction in the prevalence of risk factors, the improvement in health care and the increase in access to it, and new methods of diagnosis and treatment 4,5 .The number of myocardial revascularization surgeries increased 227% in the United States from 1979States from to 1997States from , and, in 1997,000 patients underwent this surgical procedure. In that country, approximately 1 in every 1,000 individuals undergoes myocardial revascularization surgery per year, which results in costs of $ 50 billion an-