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.
The IIC and Lyric hearing aid are both designed to be fit in the second bend of the ear canal. This is a deep insertion fitting that begins where a standard CIC ends and ends only millimetres from the ear drum. The IIC is a custom molded hearing aid that is removed daily, the same as all traditional hearing aids.