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Eur J Cardiothorac Surg 2004;26:125-128
© 2004 Elsevier Science NL

Radionuclide study of mid-term left ventricular function after endoventricular circular patch plasty

Department of Cardiovascular Surgery, Fukui Cardiovascular Center, Shinbo 2-228, Fukui city 910-0833, Japan

Received 6 October 2003; received in revised form 20 February 2004; accepted 10 March 2004.

^* Corresponding author. Tel.: +81-766-54-5660; fax: +81-766-53-2132
e-mail: h_fujii{at}bellland.or.jp

Objective: Although the early result of endoventricular circular patch plasty (EVCPP) has been reported, few are seen about the long-term results. We studied left ventricular (LV) function in the early and mid-term periods after EVCPP with electrocardiographic-gated single photon emission computed tomography (Gated SPECT). Methods: Consecutive 14 patients with LV asynergy after myocardial infarction, who had the EVCPP procedure, were studied by Gated SPECT. Mean age of patients was 67±10 years. Gated SPECT images were obtained and LV end-diastolic volume index (EDVI), LV end-systolic volume index (ESVI) and ejection fraction (EF) were studied with QGS(+) program. Gated SPECT study was performed before surgery, early (23 days) and mid-term periods (32 months) after surgery. Results: EDVI changed significantly from preoperative value to early postoperative value (107±39 to 72±37 ml/m², P<0.01). There was no significant difference between early and mid-term postoperative values. ESVI also changed significantly from preoperative value to early postoperative value, and from early value to mid-term postoperative value (78±37 to 51±34 to 47±35 ml/m², P<0.05, respectively). EF increased significantly from preoperative value to early postoperative value, and from early value to mid-term postoperative value (30±10 to 35±13 to 45±18%, P<0.05, respectively). Conclusions: Direct influence of EVCPP brought significant improvement of LV function in early period. Further decrease of ESVI and increase of EF were noticed from early period to mid-term period. This result suggest that the effect of EVCPP sustains long and yields reverse LV remodeling.

Key Words: Gated single photon emission computed tomography • Endoventricular circular patch plasty • Mid-term

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