The company was originally a book seller but has expanded to sell a wide variety of consumer goods and digital media as well as its own electronic devices, such as the Kindle e-book reader, Kindle Fire tablet and Fire TV, a streaming media adapter. Amazon Web Services(AWS) is a comprehensive, evolving cloud computing platform.
URL of this page: //medlineplus.gov/ency/article/001101.htm. An arrhythmia is a disorder of the heart rate (pulse) or heart rhythm. The heart can beat too fast (tachycardia), too slow (bradycardia), or irregularly. Normally, your heart works as a pump that brings blood to the lungs and the rest of the body.
Cardiac arrhythmia, also known as cardiac dysrhythmia or irregular heartbeat, is a group of conditions in which the heartbeat is irregular, too fast, or too slow. A heart rate that is too fast â above 100 beats per minute in adults â is called tachycardia and a heart rate that is too slow â below 60 beats per minute â is called bradycardia. Many types of arrhythmia have no symptoms. When symptoms are present these may include palpitations or feeling a pause between heartbeats.