Monophasic action potentials, electrocardiograms and mechanical performance in normal and ischaemic epicardial segments of the pig ventricle in situ

摘要: Few studies report simultaneous electrical and mechanical recordings from the epi-cardium of intact beating hearts in situ during ischaemia. We use suction to apply transducers electrodes areas epicardium. This interferes little with its behaviour allows: i) free mobility over surface; ii) tridirectional length changes be recorded summed for an overall impression behaviour; iii) detection direction movement; iv) monophasic action potential epicardial ECG. During ischaemia we can detect impaired contraction dyskinesis a change forces. The duration shortens have noted conduction, inexitability consistent re-entry leading ventricular fibrillation.