Effects of Rbl on Action Potentials and Force of Contractionin Guinea Pig Ventricular Papillary Muscles Effects of Ligustrazine on Myocardium and Coronary Artery Effect of GBE50 on action potentials in normal and simulated ischemic guinea pig papillary muscles Effects of Cymbopogon goeringii (Steud.) A. Camus Volatile Oil on Physiologic Properties of lsolated Guinea Pig Myocardium