RELEASE OF METARAMINOL (ARAMINE) FROM THE HEART BY SYMPATHETIC NERVE STIMULATION.

Cats were injected intravenously with metaraminol, an amine which depletes norepinephrine from the sympathetic nerve endings; their hearts were then perfused in vitro. Stimulation of the sympathetic nerve supply released metaraminol from the hearts, demonstrating that a synthetic compound can replace norepinephrine and serve as a transmitter at adrenergic nerve endings