Answers

2016-06-29T00:27:29+08:00
The heart is a specialised muscle that contracts regularly and continuously, pumping blood to the body and the lungs. The pumping action is caused by a flow of electricity through the heart that repeats itself in a cycle. If this electrical activity is disrupted – for example by a disturbance in the heart’s rhythm known as an ‘arrhythmia’– it can affect the heart’s ability to pump properly.
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