Effects of adrenergic drugs on the coronary circulation of Atlantic salmon (Salmo salar)

Abstract
Spontaneously beating hearts from Atlantic salmon (Salmo salar) were used to examine the adrenergic regulation of the perfused coronary circulation. Excitatory α-adrenoceptors (vasoconstriction) dominated over inhibitory β-adrenoceptors (vasodilatation). Increased heart rate via β-adrenergic stimulation was possible with drug injections into the coronary artery. The heart rate effects followed the vasoactive effect by approximately 2 min.

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