Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

56
Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
56
Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

55
Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
55
Imaging Studies for Cardiovascular System III: X-Ray01:20

Imaging Studies for Cardiovascular System III: X-Ray

229
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...
229
Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging Studies for Cardiovascular System IV: CMRI

74
Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
74
Mitral Stenosis II: Clinical features and Diagnostic Tests01:23

Mitral Stenosis II: Clinical features and Diagnostic Tests

29
Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
29
Imaging Studies for Cardiovascular System I:Echocardiography01:17

Imaging Studies for Cardiovascular System I:Echocardiography

396
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,...
396

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Analysis of the Frequency and Associated Factors of Skin Toxicity in Patients Receiving Ribociclib-Based Therapy for Metastatic Breast Cancer.

Cancers·2026
Same author

Effects of the timing of testicular sperm retrieval on intracytoplasmic sperm injection outcomes.

Clinical and experimental reproductive medicine·2025
Same author

Can left atrial diameter measured by computed tomography predict the presence and degree of left ventricular diastolic dysfunction?

Clinical and experimental emergency medicine·2024
Same author

Femoral Neck Fractures Treated by Closed Reduction and Internal Fixation with the Double Fluoroscope Technique: A Preliminary Study.

Journal of clinical medicine·2024
Same author

Semen quality and sperm DNA fragmentation in cancer patients undergoing sperm cryopreservation.

Investigative and clinical urology·2023
Same author

Effect of male age on reproductive function: A comparison of young and middle-aged men.

Investigative and clinical urology·2023

Related Experiment Video

Updated: Aug 10, 2025

Four-Dimensional Computed Tomography-Guided Valve Sizing for Transcatheter Pulmonary Valve Replacement
09:57

Four-Dimensional Computed Tomography-Guided Valve Sizing for Transcatheter Pulmonary Valve Replacement

Published on: January 20, 2022

2.7K

A study on computed tomography cardiothoracic ratio in predicting left ventricular systolic dysfunction.

Minki Chae1, Ji Ung Na1, Jang Hee Lee1

  • 1Department of Emergency Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.

Clinical and Experimental Emergency Medicine
|February 14, 2023
PubMed
Summary

The cardiothoracic ratio, a measure of heart size on CT scans, is a better indicator of left ventricular systolic dysfunction (LVSD) than previously thought. A ratio of 0.56 or higher suggests mild LVSD, while a ratio below 0.60 helps exclude severe LVSD.

Keywords:
CardiomegalyCardiothoracic ratioComputed tomographyStroke volumeThoracic radiography

More Related Videos

Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography
07:11

Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography

Published on: October 28, 2020

2.9K
Comprehensive Echocardiographic Assessment of Right Ventricle Function in a Rat Model of Pulmonary Arterial Hypertension
07:38

Comprehensive Echocardiographic Assessment of Right Ventricle Function in a Rat Model of Pulmonary Arterial Hypertension

Published on: January 20, 2023

3.7K

Related Experiment Videos

Last Updated: Aug 10, 2025

Four-Dimensional Computed Tomography-Guided Valve Sizing for Transcatheter Pulmonary Valve Replacement
09:57

Four-Dimensional Computed Tomography-Guided Valve Sizing for Transcatheter Pulmonary Valve Replacement

Published on: January 20, 2022

2.7K
Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography
07:11

Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography

Published on: October 28, 2020

2.9K
Comprehensive Echocardiographic Assessment of Right Ventricle Function in a Rat Model of Pulmonary Arterial Hypertension
07:38

Comprehensive Echocardiographic Assessment of Right Ventricle Function in a Rat Model of Pulmonary Arterial Hypertension

Published on: January 20, 2023

3.7K

Area of Science:

  • Cardiology
  • Radiology
  • Medical Imaging

Background:

  • The cardiothoracic ratio (CTR) ≥0.50 is a standard indicator for cardiomegaly.
  • Previous studies have not explored the association between CTR and left ventricular systolic dysfunction (LVSD).

Purpose of the Study:

  • To investigate the relationship between CT-measured CTR and left ventricular ejection fraction (LVEF).
  • To determine the optimal CTR for predicting LVSD.

Main Methods:

  • Retrospective cross-sectional study of 444 patients undergoing chest CT and echocardiography.
  • Patients classified by LVEF into normal, mild, moderate, and severe LVSD groups.
  • Receiver operating characteristic (ROC) curve analysis to find optimal CTR cutoffs.

Main Results:

  • Median CTR was 0.54 in normal LVEF and 0.60 in LVSD patients (P<0.001).
  • Optimal CTRs for mild, moderate, and severe LVSD were 0.56, 0.59, and 0.60, respectively.
  • Areas under ROC curves ranged from 0.653 to 0.690; negative predictive values reached 98% for severe LVSD.

Conclusions:

  • A CT-measured CTR of 0.56 is the optimal cutoff for suggesting LVSD, differing from the traditional 0.50 threshold.
  • CTR ≥0.56 can serve as an early indicator for mild LVSD.
  • CTR <0.60 provides high confidence in excluding severe LVSD.