Related Experiment Video
Updated: Nov 11, 2025
04:49
Author Spotlight: Investigating the Underlying Mechanisms of Right Ventricular Failure in Pulmonary Hypertension
Published on: June 14, 2024
973
Right Ventricular Shape Distortion in Tricuspid Regurgitation
Ashley E Morgan1, Atefeh Kashani1, Brian Zenger1
1University of Utah, Salt Lake City, UT, USA.
Computing in Cardiology
|March 29, 2021
Summary
Severe tricuspid regurgitation (TR) causes distinct right ventricular (RV) shape changes, including increased sphericity. These RV alterations can help identify TR patients and may guide future therapies.
Area of Science:
- Cardiovascular Imaging
- Cardiac Mechanics
- Medical Physics
Background:
- Tricuspid regurgitation (TR) is a right-sided heart valve dysfunction with significant consequences.
- Untreated TR leads to cardiac remodeling and heart failure.
- Specific changes in right ventricular (RV) shape due to TR remain poorly understood.
Purpose of the Study:
- To characterize the three-dimensional shape alterations of the right ventricle in patients with severe tricuspid regurgitation.
- To establish a quantitative model for identifying TR-related RV morphologic changes.
Main Methods:
- Segmentation of RVs from cardiac CINE MRI scans.
- Application of particle-based shape modeling (PSM) with entropy-based landmark optimization.
- Principal component analysis (PCA) to identify dominant modes of shape variation.
Main Results:
- Patients with severe TR exhibited increased RV sphericity compared to healthy controls.
- Key shape variations included widening of the cardiac short axis, narrowing at the RV outflow tract (RVOT), and apical blunting.
- PCA-based shape analysis correctly distinguished TR patients from controls with 86.5% accuracy.
Conclusions:
- Severe TR induces characteristic RV shape changes.
- These findings enhance understanding of TR-induced RV failure mechanisms.
- Quantified shape variations may inform novel therapeutic strategies for TR.
Related Concept Videos
01:20Mitral Regurgitation I: Introduction
147
Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
147
01:15Aortic Regurgitation I: Introduction
156
IntroductionAortic regurgitation is characterized by the backward flow of blood from the aorta into the left ventricle during diastole and arises from the improper closure of the aortic valve. This condition results in left ventricular volume overload and can stem from both acute and chronic etiologies, each contributing uniquely to the disease's progression and symptomatology.Acute and Chronic CausesAcute aortic regurgitation often results from events that suddenly impair the integrity of the...
156
01:22Aortic Regurgitation II: Clinical Features and Diagnostic Tests
162
Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
162
01:22Mitral Stenosis I: Introduction
127
Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
127
01:27Mitral Valve Prolapse I: Introduction
139
IntroductionThe mitral valve, one of the heart's four valves, regulates blood flow. These valves have flaps that open and close to direct blood properly through the heart and body. During each heartbeat, the flaps open for blood to pass through and seal shut to prevent backflow. Specifically, the mitral valve opens to allow blood flow from the heart's upper left chamber to the lower left chamber. It then closes securely as the lower left chamber contracts to pump blood to the body, preventing...
139
01:23Mitral Regurgitation II: Clinical Features and Diagnostic Tests
131
Mitral regurgitation (MR) is a valvular heart disorder in which the mitral valve fails to close tightly, allowing blood to leak backward into the heart. Understanding the clinical manifestations, assessment, diagnostic findings, and medical management of MR is crucial to effectively managing affected patients.Clinical Manifestations of Mitral RegurgitationMitral regurgitation can be acute or chronic, each presenting differently and requiring different approaches:1. Acute Mitral...
131