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Myocardial ischaemia during non-cardiac surgery. A comparison of different lead systems using computerised ST segment
Insights
Computerised ST segment analysis effectively detects myocardial ischaemia. Early diagnosis of peri-operative myocardial ischaemia is possible using ST segment analysis, even when standard electrocardiograms miss changes.
Area of Science:
- Cardiology
- Medical Technology
Background:
- Myocardial ischaemia monitoring is crucial for high-risk patients.
- Standard electrocardiogram (ECG) interpretation may miss subtle ischaemic changes.
Purpose of the Study:
- To compare the frequency of ischaemia in different electrocardiographic leads (II, V5, CS5, CB5).
- To evaluate the utility of ST segment analysis for early detection of peri-operative myocardial ischaemia.
Main Methods:
- Utilized computerised ST segment analysis.
- Monitored ischaemia in electrocardiographic leads II, V5, CS5, and CB5 in 15 patients with ischaemic heart disease.
Main Results:
- Ischaemic changes were observed in 3 out of 15 patients.
- These ischaemic changes were consistently evident across all four monitored leads (II, V5, CS5, CB5).
- A single bipolar lead demonstrated potential as a substitute for a V5 lead in monitoring high-risk patients.
Conclusions:
- ST segment analysis aids in the early diagnosis of peri-operative myocardial ischaemia.
- This method can identify ischaemia missed by standard ECGs.
- Specific lead configurations may be optimized for monitoring myocardial ischaemia.
Abstract:
Computerised ST segment analysis was used to compare the frequency of ischaemia occurring in electrocardiographic leads II, V5, CS5 and CB5. Three out of 15 patients with ischaemic heart disease developed ischaemic changes, which were evident in all four leads in each patient. A single bipolar lead may be substituted for a true V5 lead when monitoring patients at increased risk of developing myocardial ischaemia. ST segment analysis facilitates the early diagnosis of peri-operative myocardial ischaemia, which may otherwise be missed on the standard electrocardiogram.