this sympathetic hyperstimulation during the evolution of cardiac insufficiency results in many myocardial consequences : increase of the post-charge and cardiac work , depletion of the stock of neuromediator ( nor-epinephrine ) in the nerve endings of the myocardial sympathetic fibers and decrease of the number of beta-adrenergic receptors of the myocardial cell membranes .
C0018787
cardiac
C0027061
myocardial