administration of isoproterenol ( 0.1 microm ) to perfused , electrically stimulated hearts ( 5 hz ) caused a decrease in the half-time of relaxation ( rt 1/2 ) the extent of which depended on the thyroid status , i.e . hypothyroid ( -24 % ) , euthyroid ( -19 % ) or hyperthyroid ( -8 % ) .
C0040132
thyroid
C0020676
hypothyroid