Figure 1
From: Electrocardiogram artifact caused by rigors mimicking narrow complex tachycardia: a case report

Electrocardiogram taken during the rigors. Blue arrow: normal QRS complexes. Red arrows bracketed by black brackets: Noise – artifact.
From: Electrocardiogram artifact caused by rigors mimicking narrow complex tachycardia: a case report
Electrocardiogram taken during the rigors. Blue arrow: normal QRS complexes. Red arrows bracketed by black brackets: Noise – artifact.