QT Dispersion Changes Following Primary Percutaneous Coronary Intervention in Acute Myocardial Infarction Comparison between Primary PCI Plus Thrombectomy and Primary PCI without Thrombectomy

Objective: The aim of this study was to compare between primary PCI plus thrombectomy and primary PCI without thrombectomy on QT dispersion in patients presented with acute STEMI. Methods: Forty-eight patients presenting with acute STEMI who underwent primary percutaneous coronary intervention (PCI) were enrolled. QTc and QTd were calculated before, and 24 hours after the procedure. Results: 48 patients (33 males, 15 females) with a mean age of 58.6 ± 11.0 years were evaluated. The results showed significant reduction in both QTd 80.60 ± 10.14 ms vs. 44.80 ± 9.46 ms; p<0.001 and QTc d 87.00 ± 7.00 vs. 40.40 ± 8.00 ms before and 24 hours after primary PCI. QTd and QTc dispersion values were decreased slightly more in PPCI plus thrombectomy group than the PPCI alone group but were not statistically significant (p value 0.067 and 0.091) respectively. Conclusion: Our Study showed that primary PCI was effective in reducing QTc and QTd after 24 h and no significant difference on QTc and QTd whether thrombectomy used or not. These findings suggest that ischemiainduced QTd and prolonged QTc are important arrhythmogenic parameters which respond to successful PPCI and may be used as markers for successful PPCI after 24 h.