PMC3123514_01
Narrow complex tachycardia suggesting atrioventricular nodal re-entrant tachycardia
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F1
A 21-year-old female patient presented with regular narrow complex tachycardia suggesting a re-entry form of tachycardia [Figure 1].
Wenckebach phenomenon seen during a bout of palpitations
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F2
An ECG was performed which further revealed a transient train of long Wenckebach [Figure 2] where recurrent dropping of P waves was observed followed by spontaneous recovery.
Normal heart rate response during a treadmill exercise test
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F3
With peak exercise, the heart rate increased to 180 beats/minute, with no evidence of heart block or PR prolongation [Figure 3].