BLOCKADE BY BURIMAMIDE OF THE RESTORATIVE EFFECT OF HISTAMINE IN TETRODOTOXIN‐TREATED HEART PREPARATIONS

Abstract
1 In isolated heart preparations in which fast sodium channels were blocked by tetrodotoxin (2–4 × 10−5 m), excitability was restored by histamine (6 × 10−6 M to 10−5 m). 2 This effect was antagonized by EDTA (2 × 10−6 m), D600 compound (0.5 μg/ml) and the H2-receptor antagonist, burimamide (2 × 10−4 m).