After 100 years, the 12-lead electrocardiogram (ECG) remains the most accessible ... Most ECG machines today are able to read the tracings to some degree (with varying accuracy), but it is still ...
The axis of the ECG is the major direction of the overall ... Note that lead I is at zero degrees, lead II is at +60 degrees, and lead III is at +120 degrees. Lead aVL (L for left arm) is at ...
As noted above, the precordial leads are unreliable, compromising by their inclusion calculations deriving from the set of 12 ECG leads. It appears, therefore, that using sums of data from the six ...
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