Highlights a diagnostic pitfall where a U wave during SVT can mimic a pseudo P wave, leading to misclassification as a long RP tachycardia instead of common AVNRT.
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U waves may mimic pseudo P waves in AVNRT, risking long RP misclassification; leaves open systematic validation of this ECG pitfall.
The main tool for the differentiation of supraventricular tachycardia is the 12-lead electrocardiogram (ECG). Especially differentiating the atrioventricular nodal reentrant tachycardia (AVNRT) from the atrioventricular reentrant tachycardia (AVRT) due to concealed accessory pathway or from an atrial tachycardia (AT) is very important for catheter setting and ablation approach in an electrophysiological study. In our case we saw the occurrence of a U wave during tachycardia-simulating a pseudo P wave. This mimicked a long RP-tachycardia, although it was a common type AVNRT.
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Bogossian et al. (2014) studied this question.
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