Key Points
- To correlate myocardial oxygen availability with electrocardiographic recordings and muscle contraction during coronary occlusion.
- Experimental model of acute regional ischemia induced by coronary branch occlusion.
- Used polarographic method to measure myocardial oxygen levels.
- Recorded epicardial electrocardiograms and muscle contraction via cinematographic techniques.
- Epicardial electrocardiogram showed insensitivity and slowness as an ischemia index.
- Notable changes in myocardial oxygen observed immediately following significant coronary obstruction.
- Pure oxygen inhalation affected experimental outcomes, and coronary vein color changed after release of arterial occlusion.
Structured PICO
PPopulationExperimental model of acute regional ischemia of the left ventricle (acute coronary branch occlusion and narrowing)
IInterventionAcute coronary branch occlusion and narrowing, and pure oxygen inhalation
OOutcomeCorrelation of myocardial oxygen availability by polarographic method with direct epicardial electrocardiogram and cinematographic records of muscle contractionsurrogate
This experimental study demonstrates that epicardial ECG changes are a relatively slow and insensitive marker of acute regional ischemia compared to direct oxygen availability and muscle contraction.