. The American journal of roentgenology, radium therapy and nuclear medicine . ; diastolic pressure 84; silhouette cm.; trans, width cm.; cardiac volume766 The individual was estimated to be percent above the average weight for stature. Thevolume of the heart was per cent above the normfor stature, per cent below the norm for taken seated. Moderate inspiration. above and which were also published in theAmerican Journal of Roentgenologyfor December, 1917, are of the latter are based upon the followinggeneralizations: 828 Estimation of
. The American journal of roentgenology, radium therapy and nuclear medicine . ; diastolic pressure 84; silhouette cm.; trans, width cm.; cardiac volume766 The individual was estimated to be percent above the average weight for stature. Thevolume of the heart was per cent above the normfor stature, per cent below the norm for taken seated. Moderate inspiration. above and which were also published in theAmerican Journal of Roentgenologyfor December, 1917, are of the latter are based upon the followinggeneralizations: 828 Estimation of Cardiac Volume by Roentgenology i. There is typically an approximatelyconstant relation between size of heartand size of body. This may be expressedin terms of heart weight relative to bodyweight, of heart volume relative to bodyweight, heart volume relative to silhouettearea, and of silhouette area relative tobody weight. The following formulae arethose which I have adopted to expressthese relations: (i) H = , (2) V = 5-iW,.5187 (3) v = (4) W = A3/2. In these. Fit;. 3. Silhoi 1 of the heart of a man of average lOrtions. Surface configuration and valves sche-matically represented as outlined above. The age was22 years; stature in.; weight 1 5 2 lbs.;inspiration in.; expiration in.; thickness ofchest, inspiration in.; expiration in.; pulserate So; systolic blood pressure 108, diastolic 85;silhouette area 126 sq. cm.; trans, width em.;liac volume 750 cu. cm. The individual was esti-mated to be per cent abovi e weight Forlire. The volume of the heart was per centn for stature. per cent above norm forweight. Individual seated. Moderate inspiration. formulas H equals weight of heart in grams,\\, weight of body in kilograms, V, volumeof heart in cubic centimeters, A, area ofsilhouette in square centimeters. Theabove formulae express heart size in female heart is about 5 per cent lessin size for a given body weight. 2. F
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