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.
Miniaturized hearing aids that will fit into the ear canal. Miniaturization tech could also be used to monitor pulse, blood-pressure, glucose, ECG via wireless, be used in implants, pacemakers. February 17, 2014. Fraunhofer researchers pack a total of 19 hearing-aid components (left) into their new microsystem (right).
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.