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Related Concept Videos

Heart Valves01:16

Heart Valves

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The human heart is a complex organ with an intricate system of valves that regulate blood flow. There are two main types of valves: atrioventricular (AV) valves and semilunar valves.
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...
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Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

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Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
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Mitral Valve Prolapse I: Introduction01:27

Mitral Valve Prolapse I: Introduction

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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...
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Mitral Valve Prolapse II: Assessment and Management01:22

Mitral Valve Prolapse II: Assessment and Management

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IntroductionA range of clinical features characterizes Mitral Valve Prolapse (MVP), but it is important to note that many individuals with MVP are asymptomatic and may remain so throughout their lives. For those who do exhibit symptoms, the following are the key clinical features:Palpitations: This is a common symptom where individuals feel an irregular or rapid heartbeat. Palpitations in MVP are often due to arrhythmias such as premature ventricular contractions or supraventricular...
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Anatomy of the Heart01:27

Anatomy of the Heart

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The human heart is made up of three layers of tissue that are surrounded by the pericardium, a membrane that protects and confines the heart. The outermost layer, closest to the pericardium, is the epicardium. The pericardial cavity separates the pericardium from the epicardium. Beneath the epicardium is the myocardium, the middle layer, and the endocardium, the innermost layer. There are four chambers of the heart: the right atrium, the right ventricle, the left atrium, and the left ventricle.
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Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

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Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
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Related Experiment Video

Updated: Feb 5, 2026

Chronic Ovine Model of Right Ventricular Failure and Functional Tricuspid Regurgitation
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Tricuspid Valve Dysfunction Caused by Right Ventricular Leads.

Elisa Ebrille1, James D Chang1, Peter J Zimetbaum1

  • 1Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center, Harvard Medical School, 185 Pilgrim Road, Baker 4, Boston, MA, 02215, USA.

Cardiac Electrophysiology Clinics
|September 3, 2018
PubMed
Summary
This summary is machine-generated.

Tricuspid regurgitation (TR) is a growing concern, often linked to cardiac device leads. Understanding lead-related TR, its causes, and prevention is crucial for patient care.

Keywords:
Lead-related dysfunctionRight ventricular leadsTricuspid regurgitationTricuspid valve

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Area of Science:

  • Cardiology
  • Cardiac Electrophysiology
  • Valvular Heart Disease

Background:

  • Tricuspid regurgitation (TR) is increasingly recognized as a significant valvular condition.
  • Cardiac device leads (pacemakers, implantable cardioverter-defibrillators) can impact tricuspid valve structure.
  • Lead extraction procedures pose a risk of trauma to the tricuspid valve and subvalvular apparatus.

Purpose of the Study:

  • To investigate the clinical significance of lead-related tricuspid regurgitation.
  • To identify optimal diagnostic methods for lead-related TR.
  • To determine risk factors and mitigation strategies for TR associated with cardiac device leads.

Main Methods:

  • Review of clinical data and imaging studies related to tricuspid regurgitation in patients with cardiac devices.
  • Analysis of factors contributing to valve distortion and trauma during lead implantation and extraction.
  • Evaluation of diagnostic techniques for assessing lead-induced TR.

Main Results:

  • Cardiac device leads are implicated in the development and progression of tricuspid regurgitation.
  • Lead manipulation and extraction increase the risk of tricuspid valve damage.
  • Specific patient factors and lead characteristics may predispose to TR development.

Conclusions:

  • There is a need for improved understanding and management of tricuspid regurgitation related to cardiac electronic devices.
  • Optimal diagnostic and therapeutic strategies are required to address lead-related TR.
  • Further research is warranted to refine risk stratification and prevention methods for TR in this patient population.