Assessment of Left Ventricular Function and Mitral Regurgitation Severity Early After Percutaneous Device Closure of

Mohammad Sahebjam1, Neda Toofaninejad1, Ali Ajam2,3

  • 1From the Department of Echocardiography, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran.

Insights

Percutaneous closure of atrial septal defect (ASD) does not immediately alter left ventricular (LV) systolic function but increases LV end-diastolic diameter and mitral inflow velocity. The procedure effectively reduces right ventricular pressure without worsening mitral regurgitation early on.

Area of Science:

  • Cardiology
  • Echocardiography
  • Congenital Heart Disease

Background:

  • Atrial septal defect (ASD) is a common congenital heart disease in adults.
  • ASD closure normalizes right heart volumes but has variable effects on left ventricular (LV) function and mitral regurgitation (MR).

Purpose of the Study:

  • To evaluate the immediate impact of percutaneous ASD closure on LV function and MR severity.
  • To assess early changes in LV dimensions and diastolic function post-procedure.

Main Methods:

  • Prospective study of 32 patients with ASD secundum undergoing percutaneous device closure.
  • Transthoracic and transesophageal echocardiography performed pre-procedure and 24 hours post-procedure.
  • Comparison of LV parameters, including LVEDD, LVESD, LVEF, and MR severity, before and after closure.

Main Results:

  • LV end-diastolic diameter (LVEDD) significantly increased post-closure (P < 0.001).
  • LV ejection fraction (LVEF) remained unchanged; LV end-systolic diameter (LVESD) showed insignificant increase (P = 0.063).
  • Right ventricular systolic pressure decreased significantly (12.4%, P < 0.001), and mitral E/E' increased (9.7%, P = 0.010); MR severity change was insignificant (P = 0.157).

Conclusions:

  • Percutaneous ASD closure does not acutely impair LV systolic function.
  • Immediate increases in LVEDD and E/E' are observed due to altered diastolic filling patterns.
  • The procedure positively impacts right ventricular pressure and does not worsen MR early after closure.
Abstract

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