In a patient given a cardiac glycoside, which of the followings is/are important effects of the drug on the heart? A: Decreased atrioventricular conduction velocity B: Increased intracellular calcium C: Increased ectopic automaticity D: Increased force of contraction

which of the following effects of drugs for tachyarrhythmias is not correct. A: reduction of automaticity B: slowing down conduction of atrial ventricular node conduction C: elimination of reentry D: prolongation of ERP and APD E: acceleration of autodepolarization of pacemakers