Matching Pairs ECG Lead Placement MatchOnline version Test your knowledge on ECG lead placement and abnormalities with this fun matching game! by Kiera 1 V5 Lead 2 V6 Lead 3 V1 Lead 4 ST Elevation 5 V2 Lead 6 Atrial Fibrillation 7 V3 Lead 8 V4 Lead Irregular heart rhythm, no distinct P waves 5th intercostal space, anterior axillary line Indicates possible myocardial infarction 5th intercostal space, midaxillary line 4th intercostal space, right sternal border 5th intercostal space, midclavicular line Between V2 and V4 4th intercostal space, left sternal border