<unk>  effects (from chrono-, meaning time, and tropos, "a turn") are those that change the heart rate.<unk>  drugs may change the heart rate and rhythm by affecting the electrical conduction system of the heart and the nerves that influence it, such as by changing the rhythm produced by the sinoatrial node. Positive chronotropes increase heart rate; negative chronotropes decrease heart rate. A dromotrope affects atrioventricular node (AV node) conduction. A positive dromotrope increases AV nodal conduction, and a negative dromotrope decreases AV nodal conduction. A lusitrope is an agent that affects diastolic relaxation. Many positive inotropes affect preload and afterload. __TOC__
Chronotropic
Nootropic
Bathmotropic
Abionic
Anxiotropic
Dromotropic
Anxiogenic
Endemic 