out of the 130 70-year-olds who were on digitalis treatment , 37 % had obvious symptoms of heart disease requiring such treatment , 34 % lacked symptoms of arrhythmia and/or congestive failure but had heart volumes larger than those used as reference values in younger age groups , and 29 % had no symptoms indicating digitalis treatment .
C0018799
of heart disease
C0003811
arrhythmia