PubMed · 254682
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Sudden death--how can we prevent it?. https://pubmed.ncbi.nlm.nih.gov/254682/
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Development of cardiac hypertrophy is associated with depletion of endogenous catecholamine stores and increased inotropic response to exogenous catecholamines. A biochemical basis for these changes is provided by the observation that the number of cardiac beta-adrenergic receptors - as reflected in specific [3H]dihydroalprenolol binding - is increased in hypertrophy without a change in the affinity of dihydroalprenolol for the binding sites or in the capacity of isoproterenol to displace dihydroalprenolol. This change in beta-receptor numbers may be an important adaptive mechanism for preserving the contractile performance of the hypertrophied myocardium.
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