Landmark studies in coronary heart disease epidemiology. The Framingham Heart Study after 70 years and the Seven Countries Study after 60 years

This year we celebrate anniversaries of two prospective studies that have contributed most to our understanding of the epi-demiology of coronary heart disease (CHD): the Framingham Heart Study (FHS) and the Seven Countries Study (SCS). The FHS was initiated 70 years ago and is continued in the subsequent generations using new research opportunities, including evaluation of the risk factors for chronic non-cardiovascular diseases. The SCS is now finished because the original study population are mostly deceased, and the study did not continue in the children and grandchildren of the participants. The FHS allowed identification of factors predisposing to CHD, which were referred to as "risk factors" for the first time. Based on the FHS findings, a multivariate model of the 10-year CHD risk was developed, known as the Framingham Heart Score. In addition, criteria of heart failure and risk factors for atrial fibrillation were defined. The SCS provided the first evidence for an association between nutrition and CHD and laid the foundations for recommending the Mediterranean diet for cardio-vascular disease prevention.