The QRS morphology is identical to that in the lower tracing, and so if they were premature atrial complexes (PACs) with aberrant conduction, then the rhythm in the lower tracing would be SVT with ...

ICMs are one-lead ECG recorders and it is not always easy to distinguish between the various forms of supraventricular tachycardia, or between ventricular tachycardia and supraventricular ...