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The relation of antemortem characteristics to cardiovascular findings at necropsy--The Framingham Study
Insights
Premorbid cardiovascular risk factors like systolic blood pressure and cholesterol predict heart pathology. Earlier measurements showed stronger correlations with cardiac necropsy findings than recent ones.
Area of Science:
- Cardiovascular Disease Research
- Pathology
- Epidemiology
Background:
- Cardiovascular risk factors are routinely measured.
- Autopsy provides detailed cardiac pathology data.
- Understanding the link between clinical data and necropsy findings is crucial.
Purpose of the Study:
- To examine the relationship between premorbid cardiovascular risk attributes and cardiac necropsy findings.
- To determine which clinical measurements best predict specific cardiac pathologies.
Main Methods:
- Analysis of 127 decedents from the Framingham cohort.
- Correlating clinical data (blood pressure, cholesterol, weight, height) with necropsy findings (heart weight, LV thickness, coronary atherosclerosis).
- Clinical data were measured 1, 5, and 9 years prior to death.
Main Results:
- Systolic blood pressure correlated with heart weight and LV thickness in both sexes, and atherosclerosis in women.
- Serum cholesterol correlated with coronary luminal insufficiency in men and women (earlier measurements more significant).
- Multivariate analysis revealed independent predictors: systolic pressure for LV thickness (women), weight for heart weight, age for atherosclerosis (women), and cholesterol for atherosclerosis (men).
Conclusions:
- Premorbid cardiovascular risk factors, particularly systolic blood pressure and serum cholesterol, are associated with cardiac pathology.
- Earlier clinical measurements generally showed stronger correlations with necropsy findings than recent ones.
- Specific risk factors independently predict distinct cardiac structural changes.
Abstract:
The relation of premorbid cardiovascular risk attributes routinely measures at regular biennial examinations to cardiac necropsy findings using a special autopsy protocol was examined among 127 decedents of the Framingham cohort. Necropsy findings analyzed were: heart weight, left ventricular (LV) muscle thickness, percent luminal insufficiency of the coronary arteries, and percent intimal involvement with atherosclerosis. Clinical data analyzed included weight, height, blood pressure and serum cholesterol measured 1, 5, and 9 years prior to death. Systolic blood pressure, but not diastolic, correlated strongly with heart weight and LV muscle thickness in both sexes, and with atherosclerotic involvement in women, but not men. Serum cholesterol 1, 5, and 9 years antemortem all correlated positively with the degree of luminal insufficiency in men, while in women only cholesterol 9 years before death correlated significantly. In multivariate analysis only systolic pressure in women correlated independently with left ventricular muscle thickness and relative weight was the only independent correlate of heart weight. Only age was an independent significant correlate of the extent of coronary atherosclerosis in women. For men, coronary atherosclerotic involvement was independently correlated with only the serum cholesterol and measures of obesity were the major predictors of heart size. The degree of coronary pathology also correlated positively with heart weight in men and LV muscle thickness in women. In general clinical data measured just prior to death did not correlate as well with pathological findings as did earlier measurements.