The authors have studied the weight of the heart in 740 chronic chagasic. The weight of the heart of people who died with or without congestive heart failure has varieã from 100 g to 1.075 g. The largest number (564) of those hearts were hearts with congestive heart failure and they weighed between 201 g and 800 g, but only 45 hearts which had no congestive heart failure weighed between 151 g and 500 g. The weight of the heart of people who died with or without congestive heart failure but with "megas" has varied from 100 g to 750 g. The largest number of hearts with congestive heart failure (39) and without congestive heart failure (60) weighed between 101 g and 450 g. The medium weight of chagasic hearts (740) was 453±5.6 g. On the other hand, the medium weight of chagasic hearts with or without congestive heart failure and without "megas" was 479 ±5.6 g and the medium weight of hearts with or without congestive heart failure but with "megas" was 314±12.6 g. The statistical analysis used on this purpose has shown a significant difference between the two averages. The atrophy observed in the hearts of people with "megas" and especially of megaesofagus is connected with their malnutrition state and not with their age.