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Related Experiment Video

Updated: Jun 18, 2026

Ultrasonic Assessment of Myocardial Microstructure
10:53

Ultrasonic Assessment of Myocardial Microstructure

Published on: January 14, 2014

Hypercholesterolemia and myocardial function evaluated via tissue doppler imaging.

Jack Rubinstein1, Augusta Pelosi, Ameeth Vedre

  • 1Department of Internal Medicine, Division of Cardiovascular Diseases, University of Cincinnati, Cincinnati, OH 45219, USA. rubinsjk@ucmail.uc.edu

Cardiovascular Ultrasound
|December 1, 2009
PubMed
Summary
This summary is machine-generated.

High cholesterol levels in the blood and heart muscle are linked to reduced heart function. Lipid-lowering treatments showed a protective effect, suggesting a way to prevent cholesterol-induced myocardial dysfunction.

Related Experiment Videos

Last Updated: Jun 18, 2026

Ultrasonic Assessment of Myocardial Microstructure
10:53

Ultrasonic Assessment of Myocardial Microstructure

Published on: January 14, 2014

Area of Science:

  • Cardiology
  • Biochemistry
  • Medical Imaging

Background:

  • Heart failure involves complex systolic and diastolic dysfunction.
  • Hypercholesterolemia can lead to subtle myocardial function changes.
  • Tissue Doppler imaging (TDI) can detect these changes.

Purpose of the Study:

  • To investigate the association between hypercholesterolemia and myocardial dysfunction.
  • To utilize TDI to assess cardiac function in hypercholesterolemic rabbits.
  • To evaluate the impact of lipid-lowering therapy.

Main Methods:

  • Twenty-seven rabbits were divided into three groups: control (normal chow), high cholesterol diet, and high cholesterol diet with ezetimibe.
  • Echocardiography and TDI were performed under anesthesia.
  • Serum and myocardial cholesterol levels were measured.

Main Results:

  • Rabbits with high cholesterol (without ezetimibe) showed significantly lower Doppler measurements (E/A, E'/A', S') compared to controls and treated rabbits.
  • Elevated serum and myocardial cholesterol levels correlated with impaired systolic (S') and diastolic (E'/A', E/E') function.
  • No significant differences in chamber size or ejection fraction were observed between groups.

Conclusions:

  • Increased cholesterol burden in serum and myocardium is significantly associated with impaired systolic and diastolic function.
  • Lipid-lowering therapy demonstrated a protective effect against cholesterol-induced myocardial dysfunction.
  • TDI is a valuable tool for detecting early cardiac dysfunction in hypercholesterolemia.