A study of the transverse diameter of the heart silhouette with prediction table based on the teleoroentgenogram

Abstract A table was devised for obtaining the predicted transverse diameter of the heart silhouette based on the teleoroentgenogram. The table is so constructed that it was found to be unnecessary to make any correction for excessive or subnormal height, or for age. It would appear that when the systolic blood pressure is below 130 mm. the transverse diameter of the heart is normal. Above that level there is a slight or definite indication of increasing hypertrophy with increasing hypertension. It is our opinion that, for the present, the predicted transverse diameter, plus 10 per cent, might be considered as the usual upper limit for the normal heart.