Mapping electrocardiac activity
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We have developed techniques to measure the epicardial activation
sequence using an elasticated sock with 127 unipolar electrodes. The
epicardial activation sequence has been fitted to an anatomically
accurate computational model of the ventricles (left: anterior; right
posterior), where blue and red show resting and depolarised tissue
respectively. [Note: the repolarisation sequence is not indicated
here.]
Using these techniques, we have characterised the epicardial
activation sequence during normal and pathological conditions. For
more information, please refer to our Ventricular Electrogram Mapping page.
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Torso ECG mapping
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We use an elasticated vest with 256 ECG electrodes to quantify
the time-varying electropotential field (red: positive; blue: negative
potentials), which is displayed on an anatomically accurate torso
surface (left: anterior view; right: posterior view; top: neck;
bottom: abdomen) during QRS of a single normal beat.
Further information regarding the electropotential patterns
recorded under normal, paced and ischemic conditions can be found at
our Body Surface ECG Mapping page.
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ECG inverse techniques and validation
We are developing electrocardiographic inverse approaches that attempt
to non-invasively reconstruct the electrical state of the heart from
remote recordings of the electrical activity at the body surface. We
are also refining our experimental techniques in order to validate the
theoretical and computational approaches to this inverse problem. For
more information, refer to our ECG Inverse
Validation page.
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