Effects of 2-Nicotinamidoethyl Nitrate (SG-75) on Dog Coronary Artery and Cat Papillary Muscle

Abstract
Effects of SG-75 on isolated dog coronary artery and cat papillary muscle were investigated. SG-75 dose dependently relaxed the isolated coronary arterial strips contracted with K. Large doses of SG-75 depressed contraction of papillary muscle driven with electrical stimulation and inhibited enhancement of contraction of papillary muscle induced by Ca and isoproterenol. SG-75 may have a weak Ca2+-antagonistic action.