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The relationship between hypertrophy and dilatation in the postmortem heart
M L Murphy1, H J White, J Meade
1Cardiology Section, Veterans Administration Medical Center, Little Rock, Arkansas.
Insights
Postmortem heart examination can be confusing. This study found cardiac dilatation and hypertrophy generally occur together, except in cardiomyopathy and aortic stenosis, clarifying autopsy assessments.
Area of Science:
- Cardiovascular Pathology
- Autopsy Science
- Cardiac Morphology
Background:
- Distinguishing between cardiac dilatation and hypertrophy at autopsy can be challenging.
- Traditional methods like wall thickness measurements are often unreliable.
Purpose of the Study:
- To evaluate the relationship between ventricular dilatation and hypertrophy in postmortem hearts.
- To improve diagnostic accuracy in cardiac autopsy examinations.
Main Methods:
- Cardiac partition techniques were applied to 441 autopsy subjects.
- Ventricular weight and surface area were measured and correlated.
- Patients were categorized by disease.
Main Results:
- Ventricular surface area (dilatation index) strongly correlated with ventricular weight in most disease categories.
- Cardiomyopathy and aortic stenosis showed predominant hypertrophy, not proportional dilatation.
- Wall thickness was an unreliable indicator of hypertrophy.
Conclusions:
- Cardiac dilatation and hypertrophy are generally proportional in postmortem hearts across most diseases.
- Exceptions include cardiomyopathy and aortic stenosis where hypertrophy dominates.
- Accurate assessment of cardiac states at autopsy requires advanced techniques beyond routine methods.
Abstract:
Confusion may exist at the time of postmortem examination as to whether the diseased heart is dilated, hypertrophied, or both. Ventricular dilatation and ventricular hypertrophy were therefore evaluated by cardiac partition techniques in 441 subjects at autopsy to determine their relationship. Specific weight and surface area of each ventricle were obtained and patients were divided into categories of disease. Wall thickness measurements, a parameter routinely used in the ordinary autopsy, were found to be unreliable in defining hypertrophy. Ventricular surface area (an index of dilatation) was highly correlated with ventricular weight in most disease categories. Exceptions were cardiomyopathy and aortic stenosis, in which hypertrophy predominated. We conclude from these data that dilatation and hypertrophy occur proportionately in the postmortem heart in most disease categories except in cardiomyopathy and aortic stenosis. These findings clarify the relationship of dilatation and hypertrophy at the time of autopsy in most cases. Therefore, uncertainty as to whether cardiac dilatation or hypertrophy is present or which predominates is usually related to the inability to assess these states critically at the time of autopsy when the ordinary pathological methods are used.