Han Sung Lim
University of Melbourne
QRS complexInternal medicineRhythmCardiologyPR intervalElectrophysiologySinus rhythmPalpitationsQrs morphologyPrecordial examinationMedicine
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#1C. Chow (University of Melbourne)H-Index: 2
#2Om Narayan (Northern Hospital)
Last. Han Sung Lim (University of Melbourne)
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A female teenager presented with palpitations. The baseline rhythm on her ECG demonstrates sinus rhythm with normal PR interval of 120 ms, a mild degree of delta wave, RSR′ morphology in V1 with a precordial transition zone between V1 and V2. The frontal axis demonstrates normal QRS axis, in particular a positive lead III and aVF vectors, and negative aVR and aVL vectors, suggesting an overall inferior propagating QRS vector. Intermittently, however, she exhibits a different QRS morphology and a...
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