- artifacts can appear to be [[Ventricular Tachycardia]] - presence of spikes within an ECG trace may indicate the presence of an underlying rhythm within an altered recording - regular complexes cannot happen with polymorphic VT (which it what it often *appears* to be. Also, patients are usually sick with polymorphic VT. Wouldn’t have regular *organised* activity. - this is different from capture beats of VT > can do a POCUS ECHO to clarify or an arterial line! **Examples** 1. QRS complexes (arrows) and corresponding T waves (arrowheads) visible within the artifact at intervals that equal the cycle length of the sinus rhythm preceding the artifact. ![[Pasted image 20250209222812.png]] 2. An example of ECG artifact that is difficult to differentiate from VT. QRS complexes cannot be identified at every expected interval within the artifact. however, discrete components of the QRS complexes are visible at intervals that correspond to multiples of the baseline rhythm R-R interval. ![[Pasted image 20250209222914.png]] 3. Another example where normal complexes at regular intervals ![[Pasted image 20250209223411.png]] 4. ?atrial flutter. No, artifact. patient had tremor from PKD ![[Pasted image 20250209223922.png]]