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Coronary Revascularization Improves QT Dispersion in Patients with Chronic Coronary Artery Total Occlusion

Feng Zhang1, Xiaojian Zhang2, Xin Zhang1

  • 1The Fourth People's Hospital of Ji'nan, Ji'nan, 250031, China.

Cell Biochemistry and Biophysics
|December 26, 2014
PubMed

Insights

Coronary revascularization (CRV) significantly reduces QT interval dispersion in chronic coronary total occlusion (CTO) patients. Both percutaneous coronary intervention (PCI) and coronary artery bypass grafting (CABG) effectively improve cardiac electrophysiology.

Area of Science:

  • Cardiology
  • Cardiac Electrophysiology

Background:

  • QT interval dispersion is often irregular in patients with chronic coronary total occlusion (CTO).
  • Assessing the impact of coronary revascularization (CRV) on QT interval dispersion is crucial for understanding cardiac function recovery.

Purpose of the Study:

  • To evaluate the effect of coronary revascularization (CRV) on QT interval dispersion in patients diagnosed with chronic coronary total occlusion (CTO).

Main Methods:

  • 12-lead electrocardiograms were utilized to measure QT interval dispersion.
  • The study included 22 patients treated with percutaneous coronary intervention (PCI) and 24 patients treated with coronary artery bypass grafting (CABG).

Main Results:

  • Both PCI and CABG significantly diminished QT interval dispersion (QTd) and corrected QT dispersion (QTcd) (P < 0.01).
  • No significant differences in QT interval dispersion reduction were observed between PCI and CABG groups or within postoperative groups (P > 0.05).

Conclusions:

  • Coronary revascularization (CRV) effectively reduces QT interval dispersion in CTO patients.
  • Both PCI and CABG demonstrate comparable efficacy in improving myocardial electrophysiological functions, suggesting CRV revitalizes functional myocardium.

Keywords:
Chronic total occlusionCoronary artery bypass graftingCoronary artery diseasePercutaneous coronary interventionQT dispersion

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