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Coronary collateral circulation: any effect on P-wave dispersion?

Halil Aslan1, Okan Turgut, Kenan Yalta

  • 1Department of Cardiology, Faculty of Medicine, Inonu University, Malatya, Turkey.

Angiology
|April 5, 2008
PubMed

Insights

Coronary collateral circulation, which impacts heart attack damage, did not significantly affect P-wave dispersion, a predictor of atrial fibrillation. This suggests collateral circulation may not reduce arrhythmia risk in patients with significant coronary artery stenosis.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Vascular Biology

Background:

  • Coronary collateral circulation (CCC) influences myocardial damage severity during ischemia.
  • Increased P-wave dispersion (PWD) is a recognized predictor of atrial fibrillation (AF).
  • The relationship between CCC and arrhythmia risk, specifically PWD, remains incompletely understood.

Purpose of the Study:

  • To investigate the effect of coronary collateral circulation on P-wave dispersion in patients with significant coronary artery stenosis.
  • To evaluate whether the presence of collateral circulation influences PWD and potentially arrhythmia risk.

Main Methods:

  • Assessed collateral grade and P-wave dispersion in 100 patients with severe stenosis (≥85% diameter) in the left anterior descending or right coronary arteries.
  • Determined left ventricular function score (LVFS) in all participants.
  • Compared PWD and LVFS between patients with and without coronary collateral circulation.

Main Results:

  • 68 out of 100 patients exhibited coronary collateral circulation (collateral grade >or=1).
  • Patients with collateral circulation (grade >or=1) had a significantly greater left ventricular function score compared to those without (grade 0, P = .048).
  • No significant difference in P-wave dispersion was observed between patients with and without coronary collateral circulation (P = .45).

Conclusions:

  • The presence of coronary collateral circulation did not demonstrate a significant beneficial effect in reducing P-wave dispersion in this patient cohort.
  • These findings suggest that while collateral circulation may preserve left ventricular function, it does not appear to mitigate PWD, a marker for atrial fibrillation risk.

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