Section 8 - Drugs and Toxins Affecting the Heart

Click to edit Master title style Click to edit Master text styles Second level Third level Fourth level Fifth level Click to edit Master title style Click to edit Master text styles Second level Third level Fourth level Fifth level Principles of Pharmacology and Toxicology (BIOL3020) Cardiac Muscle Contraction At rest, the membrane potential of heart cells (myocytes) is negative (between contractions) This is maintained by Na /K ATPase Pumps Na outside keeping inside negative  Cardiac Muscle Contraction .  Cardiac Muscle Contraction 9  Drugs that affect the heart g  Other targets for heart drugs  Drugs and Toxins that affect the heart H  Toxicants that affect the heart