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[Comparison between classical ECG and ST mapping]
Insights
ST-mapping offers enhanced evidence for diagnosing chronic ischemic heart disease compared to standard ECG. This advanced technique improves detection of repolarization disturbances and myocardial lesions, aiding in severity assessment.
Area of Science:
- Cardiology
- Medical Diagnostics
- Electrocardiography
Background:
- Chronic ischemic heart disease diagnosis relies on clinical evaluation, ECG, and coronarography.
- Classical ECG methods may have limitations in detecting subtle repolarization disturbances and localized myocardial issues.
Purpose of the Study:
- To compare the diagnostic efficacy of ST-mapping against the classical electrocardiogram (ECG) in patients with chronic ischemic heart disease.
- To assess the ability of ST-mapping to identify repolarization abnormalities and myocardial lesions more accurately.
Main Methods:
- Comparison of findings from classical ECG (resting and post-exercise) with ST-mapping in a cohort of chronic ischemic heart disease patients.
- Inclusion of diagnoses confirmed by clinic, ECG, coronarography, and myocardial infarction history.
- Analysis of repolarization disturbance maxima, their location changes under load, and ST-mapping surface area sums.
Main Results:
- ST-mapping provided increased diagnostic evidence in 32% of cases.
- 100% correspondence was observed for definitively normal and pathological findings.
- ST-mapping demonstrated higher correlation with disease severity, better differentiation of severity degrees, and more precise pre-phase judgment than standard ECG.
Conclusions:
- ST-mapping offers superior diagnostic capabilities for chronic ischemic heart disease compared to classical ECG.
- It enhances the detection of localized repolarization disturbances and improves the localization of myocardial lesions, particularly in dorsal/caudal regions.
- ST-mapping facilitates a more accurate assessment of disease severity and progression.
Abstract:
In a group of patients with chronic ischaemic heart disease whose diagnoses were ascertained by the clinic, by the electrocardiogram after resting and after work, by the coronarography and/or by the complication of the ischaemic heart disease (myocardial infarction), we compared the findings of the classical ECG with those ones of the ST-mapping. In 32% the ST-mapping brought an increased evidence. A correspondence of 100% we found in the certainly normal and certainly pathological findings. The maxima of the repolarisation disturbances withdrew from the proof of the Wilson derivations at rest at 54.8% and under submaximal strain at 79.3%, changed in 25.8% their position under load and during the load the emigrated in 16.5% out of the precordial leads after Wilson. The evaluated sums of the partial surfaces of the ST-mapping have a higher correlation to the severity of the ischaemic heart disease, permit a better differentiation between the individual degress of severity and render possible an exacter judgment of the prephase of the ischaemic heart disease than it is possible with the usual ECG. In 25.8% of all examinations after work repolarisation disturbances limited to small myocardiac areas could be proved only by means of the mapping. The localisation of lesions of the myocardium is better possible by means of the ST-mapping above all dorsally/caudally than by means of the classical ECG.