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Learn About the Heart
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Registered
6. 2. 2012
ECG or Electrocardiograph
An ECG was first  invented in London. It was
first shown to be practicable at the
Middlesex Hospital, although, its discovery
is often attributed to the Dutch.

It records the electrical activity of the heart
and, therefore, has only a little to do with
the heart muscle function and the flow
down coronary arteries. Only when
these are significantly deranged will the
ECG become abnormal.

If the plumbing in a house goes really
wrong the electrics might eventually become
affected!
Patients and many doctors have an undue faith in the ECG. The
problem is that it can look normal, even in the presence of heart disease
(a so - called false negative result) and falsely abnormal when there is
nothing wrong (a false positive result).
Our Marquette ECG
Recorder
ECG waveforms