title: Conduction of the cardiac impulse. II. Summation and inhibition.
mesh_terms: D000200:Action Potentials; D000818:Animals; D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D004285:Dogs; D004558:Electric Stimulation; D004566:Electrodes; D006327:Heart Block / Q000503:physiopathology*; D006329:Heart Conduction System / Q000187:drug effects / Q000503:physiopathology*; D066298:In Vitro Techniques; D009431:Neural Conduction / Q000187:drug effects; D011188:Potassium / Q000494:pharmacology; D013610:Tachycardia / Q000503:physiopathology; D013997:Time Factors; D014693:Ventricular Fibrillation / Q000503:physiopathology
chemical_list: D011188:Potassium