AI Article Synopsis
- Myocardial ischemia can cause problems with heart signals, and this study looked at how a specific heart procedure helps improve those signals in patients with stable chest pain.
- The researchers measured heart signal timings (like QRS and QT intervals) before and after the procedure using special heart test machines.
- They found that after the procedure, the spread or differences in certain heart signal timings got shorter, showing that the treatment worked well for the patients.
Article Abstract
Background: Myocardial ischemia is one of several causes of prolonged QT dispersion. The aim of this study was to evaluate the effect that percutaneous coronary intervention has on the depolarization and repolarization parameters of surface electrocardiography in patients with chronic stable angina.
Methods: We assessed the effects of full revascularization in patients with chronic stable angina and single-vessel disease who underwent percutaneous coronary intervention. Twelve-lead electrocardiograms were recorded before intervention and 24 hours subsequently. We measured parameters including QRS duration, QT and corrected QT durations, and JT and corrected JT duration in both electrocardiograms and compared the values.
Results: There were significant differences between the mean QRS interval (0.086 ± 0.01 sec vs. 0.082 ± 0.01 second; p value = 0.01), mean corrected QT dispersion (0.080 ± 0.04 sec vs. 0.068 ± 0.04 sec; p value = 0.001), and mean corrected JT dispersion (0.074 ± 0.04 sec vs. 0.063 ± 0.04 sec; p value = 0.001) before and after percutaneous coronary intervention. No significant differences were found between the other ECG parameters.
Conclusion: Our data indicate that the shortening of corrected QT dispersion and corrected JT dispersion in patients undergoing percutaneous coronary intervention is prominent.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3466863 | PMC |
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