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Imaging Studies for Cardiovascular System I:Echocardiography01:17

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Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
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Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per...
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Echocardiography plays a role in assessing cardiac health and detecting heart conditions, with various types providing critical insights for diagnosis and treatment.
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The human heart is a complex organ made up of four chambers: the right and left atria and the right and left ventricles. These internal chambers are separated by partitions known as the interatrial and interventricular septa. The exterior of the heart features a groove known as the coronary sulcus that demarcates the atria from the ventricles, while the anterior and posterior interventricular sulci distinguish between the two ventricles.
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Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography
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Right ventricular contraction patterns in healthy children using three-dimensional echocardiography.

Christopher Valle1,2, Adrienn Ujvari3, Eleni Elia1,2,4

  • 1Department of Cardiology, Boston Children's Hospital, Boston, MA, United States.

Frontiers in Cardiovascular Medicine
|August 21, 2023
PubMed
Summary

Three-dimensional echocardiography reveals anteroposterior shortening as the primary component of right ventricle (RV) contraction in healthy children. This advanced imaging technique enhances understanding of RV function and its maturational changes.

Keywords:
myocardial deformationpediatric cardiologyright ventriclethree dimensional echocardiographyventricular mechanics

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Area of Science:

  • Cardiology
  • Pediatric Cardiology
  • Medical Imaging

Background:

  • The right ventricle (RV) exhibits complex geometry and triaxial motion (longitudinal, radial, anteroposterior), complicating quantitative functional assessment.
  • Traditional two-dimensional echocardiography (2DE) has limitations in fully evaluating RV function due to its complexity.
  • Three-dimensional (3D) echocardiography offers a more comprehensive approach to assessing RV function contributors.

Purpose of the Study:

  • To quantify longitudinal, radial, and anteroposterior components of global RV function in healthy children using 3D echocardiography.
  • To investigate maturational changes in these RV function parameters within a pediatric cohort.
  • To establish normative data for RV function components in children.

Main Methods:

  • Acquired 3D echocardiographic datasets from a cohort of healthy pediatric patients with normal cardiac structures.
  • Performed offline analysis to generate RV contours and decompose motion into longitudinal, radial, and anteroposterior components.
  • Calculated ejection fractions (LEF, REF, AEF) for each component and indexed them against global RVEF; calculated strain values.

Main Results:

  • Analysis included 166 healthy children (median age 13.5 years).
  • Anteroposterior ejection fraction (AEF) was significantly greater than radial (REF) and longitudinal (LEF) ejection fractions (p < 0.001).
  • Age-related differences were observed in global RV ejection fraction, REF, and all RV strain components.

Conclusions:

  • Anteroposterior shortening represents the dominant component of RV contraction in healthy children.
  • 3D echocardiographic evaluation of RV parameters in children is feasible and improves understanding of RV function.
  • This approach may aid in future recognition of RV dysfunction and assessment of treatment efficacy.