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Related Concept Videos

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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Imaging Studies for Cardiovascular System II:Types of Echocardiography01:20

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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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Reference Echocardiographic Values for Cardiac Chambers in Brazil: A Multiregional, Multi-Racial Study.

Ana Clara Tude Rodrigues1,2, Roberto Magalhães Saraiva3, Viviane T Hotta4

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This study provides crucial echocardiographic reference values for healthy Brazilians, revealing important sex and regional differences in cardiac measurements. These findings highlight the need for Brazil-specific cardiac standards.

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Area of Science:

  • Cardiology
  • Echocardiography
  • Medical Imaging

Background:

  • Cardiac chamber quantification is vital for clinical decisions.
  • International echocardiographic standards may not represent Brazil's diverse population.
  • Regional anthropometric and socioeconomic variations exist in Brazil.

Purpose of the Study:

  • Establish reference echocardiographic measurements for healthy Brazilian adults.
  • Investigate geographic and sex-related differences in cardiac parameters across Brazil's regions.

Main Methods:

  • Prospective, multicenter study of 496 healthy Brazilian volunteers.
  • Transthoracic echocardiograms analyzed for left ventricular (LV) and left atrial (LA) dimensions, volumes, mass, ejection fraction, and global longitudinal strain (GLS).
  • Statistical comparisons performed by sex and geographic region.

Main Results:

  • Men exhibited greater cardiac chamber dimensions and LV mass compared to women, even after body surface area indexing.
  • Significant regional variations observed, with the Center-West showing smaller LV volumes and lower GLS, particularly in women.
  • No significant associations between self-reported race and most echocardiographic parameters, except for lower RVGLS and LASr in White participants.

Conclusions:

  • Established echocardiographic reference values for a representative Brazilian cohort.
  • Confirmed expected sex-related differences in cardiac measurements.
  • Identified significant, previously unrecognized regional variations in cardiac chamber dimensions, emphasizing the need for population-specific standards.