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[Multipolar image of the heart in patients after myocardial infarction]
1Katedra i Zakład Patofizjologii AM, Wrocławiu.
Insights
This study found that the non-dipolarity index is elevated in patients with cardiac ischemia, particularly in those with recurrent or large myocardial infarction and angina pectoris. This index may help assess infarction severity.
Area of Science:
- Cardiology
- Medical Imaging
- Biomedical Engineering
Background:
- Cardiac ischemia, including myocardial infarction and angina pectoris, affects a significant patient population.
- Accurate assessment of infarction extent and severity is crucial for patient management and prognosis.
- Existing electrocardiographic methods may require enhancement for detailed analysis of cardiac electrical activity.
Purpose of the Study:
- To investigate the utility of a novel non-dipolarity index (km) derived from multipolar electrocardiography in evaluating cardiac ischemia.
- To correlate the non-dipolarity index with the presence and characteristics of myocardial infarction and angina pectoris.
- To explore the potential of this index in differentiating infarction severity and recurrence.
Main Methods:
- Multipolar electrocardiographic recordings were obtained from 136 cardiac ischemia patients using a multi-electrode network (diamentoid).
- Vectorcardiography was performed using the Kowarzyk method.
- The QRS complex was analyzed in 8 sectors to calculate the non-dipolarity index (km) and its graphical representation.
Main Results:
- The non-dipolarity index (km) was found to be significantly higher in patients with recurrent and large myocardial infarctions.
- An increased non-dipolarity index was also observed in patients experiencing angina pectoris.
- The index demonstrated potential as a quantitative measure reflecting the extent of cardiac electrical abnormalities.
Conclusions:
- The non-dipolarity index (km) shows promise as a valuable tool for assessing the severity of cardiac ischemia, particularly myocardial infarction.
- Elevated non-dipolarity index values correlate with more extensive infarction and the presence of angina pectoris.
- Further research may establish this index as a standard diagnostic parameter in cardiology.
Abstract:
This paper regards 136 cases of cardiac ischaemia including 93 post-infarction cases and 43 with post-effort angina pectoris. The patients with history of infarction were divided according to its electrocardiographic++ location. The groups of subjects were submitted to multipolar electrocardiographic recording from chest surface by means of a multi-electrode network (diamentoid) introduced to vectorcardiography by the Kowarzyk method. The QRS complex divided into 8 equal sectors served as the basis for calculating, among other things of the non-ipolarity index (km) and its graphical representation. The ++non-dipolarity index tends to be especially high in patients with recurrent and large infarction, it was increased in angina pectoris.