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).
Photo by Erica Joy. Earbuds and in-ear headphones are tiny earpieces that go inside your ears. You're probably familiar with these, as cheaper earbuds often come with music players (like the iPod). Earbuds generally sit in the bowls of your ears, while in-ear variants actually go in the ear canal, some fairly deeply.