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Histopathological study of specimens obtained by left ventricular biopsy during ventriculoplasty for idiopathic

Shinichiro Shimura1, Yoshiro Matsui, Chikao Yutani

  • 1Department of Cardiovascular Surgery, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan. shimura@is.icc.u-tokai.ac.jp

The Tokai Journal of Experimental and Clinical Medicine
|February 15, 2011
PubMed

Insights

Interstitial fibrosis in dilated cardiomyopathy (DCM) increases with age and decreases with larger left ventricular diastolic diameter (LVDd). Histopathological findings may not fully reflect clinical changes in DCM.

Area of Science:

  • Cardiology
  • Pathology
  • Medical Research

Background:

  • Idiopathic dilated cardiomyopathy (DCM) involves myocardial pathological changes.
  • Current understanding of the relationship between DCM myocardial pathology and clinical findings is limited.
  • Endomyocardial biopsy is typically used to study DCM myocardial pathology.

Purpose of the Study:

  • To investigate correlations between clinical findings and histopathological findings in left ventricular myocardium.
  • To analyze myocardial pathology in DCM patients undergoing left ventriculoplasty.

Main Methods:

  • Retrospective analysis of 20 DCM patients undergoing left ventriculoplasty.
  • Clinical data included age, NYHA classification, BNP, CTR, echocardiography (LVDd), and medical history.
  • Histopathological analysis assessed myocardial hypertrophy, attenuation, vacuolation, and fibrosis.

Main Results:

  • A significant positive correlation was observed between patient age and interstitial fibrosis.
  • A significant inverse correlation was found between left ventricular diastolic diameter (LVDd) and interstitial fibrosis.
  • No other significant relationships were identified between histopathological scores and clinical findings.

Conclusions:

  • Interstitial fibrosis in DCM increases with aging and is inversely related to LVDd.
  • Myocardial fibrosis kinetics and remodeling in DCM may be variable.
  • Histopathological findings may not accurately reflect clinical and hemodynamic changes in DCM patients.
Abstract

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