The wide complex is simply artifact from patient movement, however may be mistaken for ventricular tachycardia.

Note in lead V5 rhythm strip how the amplitude of the QRS complexes vary, however not beat to beat as would be seen in electrical alternans. This variation can occur with the respiratory cycle as ...

"We also found that the likelihood of an artifact which is due to one of the leads not being placed correctly or as firmly as it should be, was 50% less likely to occur. Having a high quality EKG ...

Ultra-High Resolution ECG makes it possible to record true pacer artifact, diagnose pacer function or malfunction, and verify pathological ST-Segment changes. This tiny, but efficient Holter ...