Abstract
In order to provide data on the variations in ventricular weights of calf hearts at sea level, the ratio of right ventricular weight (RVW) to left ventricular weight (LVW) was determined for 21 hearts of normal calves ranging in age from 1 day to 12 months. Hearts of calves less than 5 days of age had a mean RVW LVW of 1.00 (SD = 0.136; SE = 0.078). Twelve 6-month-old calves had RVW LVW of 0.58 (SD = 0.042; SE = 0.012). Six 12-month-old specimens had a mean RVW LVW of 0.59 (SD = 0.012; SE = 0.003). At birth the RVW predominates. At the age of 6 months the adult RVW LVW ratio has been established. These data are quite similar to those previously established for the human.
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