Observations on the Assessment of Cardiac Hypertrophy Utilizing a Chamber Partition Technique

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Abstract
Three hundred fifty-four adult human hearts were dissected utilizing a technique similar to those previously described by Müller 1 and Lewis. 2 A classification was synthesized on the basis of anatomic characteristics of 100 normal hearts. Presumptive evidence of either left or right ventricular overload, provided by clinical and autopsy observation, served as essential corollary data in establishing normal limits. The existence of hypertrophy was readily recognized in hearts in which one or both ventricles increased in mass sufficiently to surpass the defined upper limit. Isolated ventricular hypertrophy of mild degree was recognized as a consequence of an abnormal LV+S/RV ratio in 58 hearts in which ventricular weights were within the normal range. Factors which would be expected to result in left or right ventricular overload were demonstrable in 42 of these cases. Atrial hypertrophy correlated well with hypertrophy of the corresponding ventricle and served as an invaluable aid in recognition of mild degrees of combined ventricular hypertrophy. This classification constitutes the basis for a subsequent correlative electrocardiographic study.

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