Quick Answer. Cardiotonic drugs are substances that increase the contracting mechanism within the heart, thereby causing more blood to be pumped throughout the circulatory system. These drugs usually affect intracellular calcium levels in the heart muscle to achieve the desired increase in muscle action.
Like the name suggests, the entire CIC hearing aid fits into the ear canal. There is nothing on the outside of the ear, making it virtually unnoticeable. The CIC hearing aid is custom-made to fit into your ear canal to ensure a perfect fit.
In-The-Canal Like invisible hearing aids, In-the-Canals (ITC) are custom-fit to your unique ear, but the faceplate shows in the outer portion of the first bend. In-The-Ear In-the-Ear hearing aids (ITE) are also custom molded uniquely for you and feature a faceplate that shows in the outer portion of your ear.