This classification is based on the way these drugs are used for the treatment of a particular condition. Inotropic, Chronotropic and Dromotropic are different types of cardiac drugs. This classification is based on the way these drugs are used for the treatment of a particular condition. Inotropic drugs affect the force of cardiac contraction. Chronotropic drugs affect the heart rate. Dromotropic drugs affect conduction velocity through the conducting tissues of the heart.
ectoparasite noun a parasite which lives on the skin or outer surface of its host but feeds by piercing the skin. Compare endoparasite
Medical Definition of ectopic. 1  1: occurring in an abnormal position an ectopic kidneyâcompare entopic. 2  2: originating in an area of the heart other than the sinoatrial node ectopic beats; also : initiating ectopic heartbeats an ectopic pacemaker.