tachyarrhythmia

Ajmaline (Cardiorythmine) is a class Ia anti-arrhythmic compound that is widely used for the diagnosis of Brugada syndrome and the acute treatment of atrial or ventricular tachycardia. Ajmaline inhibits cardiac Kv1.5 and Kv4.3 channels at therapeutic concentrations.

Pilsicainide HCl (SUN 1165) is a pure sodium channel blocker

Atropine (DL-Hyoscyamine) Sulfate is the sulfate salt of atropine, a naturally-occurring alkaloid isolated from the plant Atropa belladonna. Atropine functions as a sympathetic, competitive antagonist of muscarinic cholinergic receptors, thereby abolishing the effects of parasympathetic stimulation.

Atropine sulfate (Sulfatropinol) is a competitive antagonist for muscarinic acetylcholine receptor.

Nifekalant hydrochloride is an IKr potassium channel blocker with an IC50 of 10 µM. It is a Class III antiarrhythmic compound and can be used in the study of tachyarrhythmias.