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.
Rating Newest Oldest. Best Answer: Earbuds: Go inside your ear canal (have the little foam/rubber tips) Earphones: Don't actually go INSIDE your ear, rest just outside the ear canal. Headphones: Cover your entire outer ear and either clip on or go around your head.