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.
Ace is the smallest Receiver In the Canal (RIC) hearing aid available. Its design makes it nearly invisible and its fitting range is appropriate for mild to severe hearing loss. The case of Ace Primax is only about 22 mm or .87 inches long. There is a trade-off for its small size.