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Related Concept Videos

Imaging Studies for Cardiovascular System III: X-Ray01:20

Imaging Studies for Cardiovascular System III: X-Ray

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The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
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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.
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion,...
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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 regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
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The pulse is one of the most fundamental physiological indicators of the body's cardiovascular health. It is the rhythmic expansion and contraction of the arterial walls in response to the pressure generated by the heart's pumping action.
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Related Experiment Video

Updated: Apr 30, 2026

Transthoracic Echocardiography to Assess Post-Resuscitation Left Ventricular Dysfunction After Acute Myocardial Infarction and Cardiac Arrest in Pigs
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Left ventricular ejection fraction and volumes: it depends on the imaging method.

Peter W Wood1, Jonathan B Choy, Navin C Nanda

  • 1Division of Cardiology, Mazankowski Alberta Heart Institute, Edmonton, Alberta, Canada.

Echocardiography (Mount Kisco, N.Y.)
|May 3, 2014
PubMed
Summary

Contrast 2D echocardiography and 3D echocardiography show good agreement with cardiac magnetic resonance imaging for left ventricular ejection fraction. However, volume measurements vary, necessitating further research for clinical applications.

Keywords:
contrast imagingechocardiographyleft ventricular ejection fractionleft ventricular functionthree‐dimensional transthoracic echocardiography

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Echocardiographic Assessment of Cardiac Anatomy and Function in Adult Rats
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Area of Science:

  • Cardiovascular Imaging
  • Echocardiography
  • Cardiac MRI

Background:

  • Echocardiographic methods for measuring left ventricular (LV) volume and ejection fraction (LVEF) vary.
  • Reference values and comparisons with advanced imaging modalities are needed.

Purpose of the Study:

  • To review studies reporting reference values for LV volumes and LVEF.
  • To compare echocardiographic methods (2D and 3D ECHO, contrast vs. noncontrast) with cardiac magnetic resonance imaging (CMR).

Main Methods:

  • PubMed review of studies reporting reference values in normal populations.
  • Analysis of studies comparing echocardiography (2D/3D, contrast/noncontrast) with CMR in patients.

Main Results:

  • LVEF agreement with CMR was good for contrast 2D ECHO and noncontrast 3D ECHO.
  • LV volumes (EDV, ESV) showed greater variability and were smaller with echocardiography compared to CMR.
  • Contrast 2D ECHO and 3D ECHO demonstrated superiority over noncontrast 2D ECHO in reproducibility and agreement with CMR.

Conclusions:

  • Contrast 2D ECHO and noncontrast 3D ECHO offer reliable LVEF measurements comparable to CMR.
  • Volume measurements require further investigation due to discrepancies.
  • Clinical utility of contrast 3D ECHO needs additional study, especially in patients with suboptimal acoustic windows.