Related Experiment Video
Updated: Aug 9, 2026
10:18
Generation and Characterization of Right Ventricular Myocardial Infarction Induced by Permanent Ligation of the Right Coronary Artery in Mice
Published on: February 1, 2022
Physiopathology of right ventricular failure
1The Hospital for Sick Children, Toronto, Ontario, Canada.
Summary
Right ventricular failure after tetralogy of Fallot repair stems from chronic volume overload due to pulmonary regurgitation. This impacts RV function, leading to heart failure and arrhythmias.
Area of Science:
- Cardiology
- Pediatric Cardiology
- Cardiac Surgery
Background:
- Tetralogy of Fallot repair can lead to chronic right ventricular (RV) volume overload from pulmonary regurgitation.
- RV failure is a significant complication impacting long-term outcomes after surgical repair.
Purpose of the Study:
- To discuss the complex physiopathology of RV failure post-tetralogy of Fallot repair.
- To explore the determinants of RV dysfunction, including pulmonary regurgitation and its effects.
Main Methods:
- Review of current literature on RV physiology and pathology after Tetralogy of Fallot repair.
- Discussion of mechanical and electrical interactions within the RV.
Main Results:
- Pulmonary regurgitation is a primary driver of RV volume overload.
- Adverse RV conditions can lead to exercise intolerance, heart failure, and arrhythmias.
Conclusions:
- RV function is critically dependent on outflow tract competence, afterload, and diastolic performance.
- Understanding RV mechano-electric interactions is key to managing RV failure.
Related Concept Videos
01:20Mitral Regurgitation I: Introduction
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...
01:29Heart Failure II: Pathophysiology
Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
01:17Pathophysiology of Heart Failure
Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
01:22Mitral Stenosis I: Introduction
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...
01:26Heart Failure III: Clinical Manifestations
Heart failure (HF) manifests primarily as dyspnea, fatigue, and fluid retention, resulting in peripheral and pulmonary edema. Symptoms may vary depending on which ventricle is more affected, left or right.Left-Sided Heart FailureAlso known as left ventricular failure, this condition results from the left ventricle's inability to fill or eject sufficient blood into the systemic circulation. It leads to pulmonary congestion, which occurs when the left ventricle fails to eject blood effectively...
01:27Heart Failure I: Introduction
Heart failure refers to a clinical syndrome caused by structural or functional cardiac disorders that prevent the heart from pumping an adequate amount of blood to meet the body's metabolic needs. This condition often arises from myocardial infarction or ischemia, leading to decreased cardiac output, reduced tissue perfusion, impaired gas exchange, fluid volume imbalance, and decreased functional ability.Heart failure can result from disruptions in the mechanisms that regulate cardiac output...