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.
You can wear hearing aids behind your ear, in your outer ear, in your ear canal , or completely implanted in the ear. The kind of hearing aid you choose depends on many things, including your degree of hearing loss, your doctor or audiologist's advice, and what kind of hearing aid you want. See a picture of different styles of external hearing aids .