A signal averaged ECG is a diagnostic test that averages multiple QRS complexes ... activity that is not apparent on the standard 12-lead ECG. “Early afterdepolarizations” or “late ...

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 ...

Harvard Health says that a stress test can detect “abnormalities in blood pressure, heart rate or ECG or worsening physical symptoms. (It) could point to coronary artery disease (CAD): fatty ...