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[The influence of percutaneous coronary intervention on mitral apparatus function in unstable coronary heart disease]

Danuta Sorysz1, Dariusz Dudek, Jacek Legutko

  • 1II Klinika Kardiologii, Collegium Medicum Uniwersytetu Jagiellońskiego, Kraków.

Kardiologia Polska
|June 10, 2010
PubMed

Insights

Percutaneous coronary intervention (PCI) improves mitral apparatus function in coronary heart disease (CHD) patients. Unstable angina patients show significant benefits in mitral regurgitation and overall valve function after PCI.

Area of Science:

  • Cardiology
  • Cardiac Surgery
  • Interventional Cardiology

Background:

  • The mitral apparatus (MA) is crucial for proper heart function, with its integrity essential for effective valve closure during systole.
  • Coronary heart disease (CHD) negatively impacts left ventricle function, and revascularization via percutaneous coronary intervention (PCI) shows promise.
  • Long-term data on PCI's influence on MA function and mitral regurgitation (MR) in CHD patients is limited.

Purpose of the Study:

  • To compare the effects of PCI on mitral apparatus function in patients with stable versus unstable coronary heart disease.
  • To evaluate changes in mitral regurgitation and left ventricular dimensions following PCI in CHD patients.

Main Methods:

  • A study involving 55 patients with documented CHD undergoing PCI, with MA function assessed via echocardiography before and 6 months after the procedure.
  • Patients with at least grade I or II mitral regurgitation were included.
  • The study comprised a subgroup of 40 patients with stable angina and 15 patients with unstable angina.

Main Results:

  • In the unstable angina group (Group II), PCI led to a significant decrease in left ventricular end-diastolic diameter (LVEDd) and left ventricular end-systolic diameter (LVESd) (p < 0.001).
  • Ejection fraction (EF) increased by 9.21% in Group II (p = 0.004) compared to 3.71% in Group I (p = 0.006).
  • Mitral valve regurgitation (MVR) volume decreased significantly more in Group II (9.57 ml) compared to Group I (1.23 ml), with a greater increase in mitral ring presystolic dimension reduction observed in Group II (0.11, p = 0.01 vs. 0.05 in Group I).

Conclusions:

  • PCI demonstrates beneficial effects on the mechanisms underlying ischemic mitral regurgitation, with outcomes dependent on the extent of damage and revascularization.
  • PCI universally benefits mitral apparatus function in patients with unstable angina, leading to a statistically significant reduction in mitral regurgitation.
Abstract

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