Effects of Aqueous Extract of Rhizoma Seu Radix Notopterygii (Notopterygium incisum Ting ex H. T. Chang) on Experimertal Arrhythmias Studies on Antiarrhythmic Effects of the Leaves of Dendropanax chevalieri (Vig.) Merr. et Chun. Antiarrhythmic Effects of Cordyceps sinensis (Berk.) Sacc. Antiarrhythmic Effects of Crebanine Advances in studies on Chinese materia medica effect on ion channels of myocardial cell