case_images: PMC3123514_01
case_images: Narrow complex tachycardia suggesting atrioventricular nodal re-entrant tachycardia
case_images: HV-12-32-g001.jpg
case_images: PMC3123514_01_HV-12-32-g001.jpg
case_images: F1
case_images: A 21-year-old female patient presented with regular narrow complex tachycardia suggesting a re-entry form of tachycardia [Figure 1].
case_images: Wenckebach phenomenon seen during a bout of palpitations
case_images: HV-12-32-g002.jpg
case_images: PMC3123514_01_HV-12-32-g002.jpg
case_images: F2
case_images: 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.
case_images: Normal heart rate response during a treadmill exercise test
case_images: HV-12-32-g003.jpg
case_images: PMC3123514_01_HV-12-32-g003.jpg
case_images: F3
case_images: With peak exercise, the heart rate increased to 180 beats/minute, with no evidence of heart block or PR prolongation [Figure 3].