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).
2) Use the proper sized ear tips. Earphones usually come with multiple sizes of ear tips. Trying all the sizes that came with the earphone will help you achieve the best combination of comfort, security, and good sound quality. Even if you have preconceived thoughts about the size of your ear/ear canal, a particular ear tip may fit better than others.