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Related Experiment Videos

Left ventricular papillary muscle morphology and function in left ventricular hypertrophy and left ventricular

E C Madu1, D S Baugh, I A D'Cruz

  • 1Department of Medicine, Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, Tennessee 37232-6300, USA. ernest.madu@mcmail.vanderbilt.edu

Medical Science Monitor : International Medical Journal of Experimental and Clinical Research
|November 1, 2001
PubMed
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Transesophageal echocardiography (TEE) reveals papillary muscle (PM) anatomy and function in humans. This study quantifies PM morphology and contractile performance across various left ventricular (LV) conditions.

Area of Science:

  • Cardiovascular Imaging
  • Echocardiography
  • Cardiac Anatomy

Background:

  • Papillary muscles (PM) are crucial for left ventricular (LV) function.
  • Understanding PM anatomy and contractile performance is vital in various LV conditions.
  • Previous studies lacked detailed quantitative data on human PMs in vivo.

Purpose of the Study:

  • To evaluate the anatomy and contractile performance of LV papillary muscles (PM) in humans using transesophageal echocardiography (TEE).
  • To determine the relationship between PM anatomy and contractile function in normal LV, left ventricular hypertrophy (LVH), and systolic dysfunction.

Main Methods:

  • Prospective TEE examinations in 153 patients.
  • Measurement of PM dimensions (area, length) and calculation of fractional shortening (FS).

Related Experiment Videos

  • Assessment of LV ejection fraction (EF), wall thickness, and mass via transthoracic echocardiography.

    • Main Results:

    • In normal EF, % FS was 21.1% (APM) and 17.1% (PPM).
    • Hypertrophied LV showed increased PM thickness and cross-sectional area.
    • Dilated cardiomyopathy featured longer and thinner PMs compared to normal EF.

    Conclusions:

    • TEE is a safe and effective method for studying PM morphology and function in humans.
    • Quantitative TEE data on PM geometry, size, and contractile function are presented for the first time.
    • Findings provide novel insights into PM adaptations in different LV states.