the study of the anatomy, normal functions, and disorders of the heart. The medical field dedicated to diagnosing and treating diseases of the heart and cardiovascular system. See Interventional cardiology, Nuclear cardiology.. APC, or atrial premature complex (or beat) is a beat that arise in the atria of the heart from outside the normal mechanism of heartbeats. It's very common and doesn't portend any bad prognosis. It increase with age, smoking, coffee intake, alcohol intake, and stress, and also with heart and lung disease.
A nanometer is a unit of spatial measurement that is 10-9 meter, or one billionth of a meter. It is commonly used in nanotechnology, the building of extremely small machines. This was last updated in September 2005.
a nanometer nm is 1000 times smaller than a micrometer it is equal to 1 1000000 000th or one billionth of a meter when things are this small you can t see them with your eyes or a light microscopeobjects this small require a special tool called a scanning probe microscope meter is a little bit bigger than a yard a lot of things in our everyday lives are around the same size as a meter an elementary school student is approximately one meter m tall however most professional basketball players are at least 2 meters m tall shaquille o neill at 7 1 is 2 1 m tall