ECG Mapping During Cardiac Ischaemia
TEMPORAL EVOLUTION OF ELECTROCARDIAC ACTIVITY DURING LAD OCCLUSION
| Control | LAD Occlusion | Reperfusion | |||||
| 0s | 60s | 120s | 180s | 240s | 60s | 300s | |
| Epicardial activation |
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| BSPM |  |
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| Full screen | Full screen | Full screen | Full screen | Full screen | Full screen | ||
| Lead V1 |  |
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| Lead II |  |
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Legend: Concurrent cardiac and body surface electro-activity during a four minute period of left anterior descending coronary artery (LAD) occlusion and five minutes of reperfusion. Epi actn: ventricular epicardial activation sequences, with red/blue denoting regions of earliest/latest excitation, respectively. BSPM: body surface potential maps (red/blue showing positive/negative potentials, respectively) at peak T of the Lead V1 ECG. Bottom: Lead II ECG. Paired maps illustrate anterior (left) and posterior (right) views of the 3D surfaces (for BSPM top: neck; bottom: abdomen).
Click the images for the full cycle animations (beware: large files!) or larger images.
SPATIO-TEMPORAL EVOLUTION OF ELECTRICAL ACTIVITY RECORDED CONCURRENTLY FROM THE EPICARDIUM AND BODY SURFACE DURING CARDIAC ISCHAEMIA IN THE ANAESTHETISED PIG
C.P. Bradley, M.P. Nash & D.J. Paterson (2001). J Physiol 533P. [Abstract]
Figure 1: Control and 240 s ischaemia ECG leads II and V1 and epicardial activation hammer maps. Circle (o) denotes regions of earliest epicardial activation and star (*) denotes regions of latest activation.
Page written by Dr Martyn Nash