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Heart Valves

Heart Valves

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...

Heart Failure VI: Adjunct Therapies

Heart Failure VI: Adjunct Therapies

Additional therapies for treating patients with heart failure (HF) may include procedural interventions, supplemental oxygen, the management of sleep disorders, and nutritional therapy.Procedural InterventionsImplantable Cardioverter-Defibrillator: For patients at risk of life-threatening arrhythmias due to severe left ventricular dysfunction, an Implantable Cardioverter-Defibrillator (ICD) can detect and terminate these arrhythmias, preventing sudden cardiac death and improving survival rates.

Mitral Valve Prolapse I: Introduction

Mitral Valve Prolapse I: Introduction

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...

Cardiomyopathy V: Interprofessional Care

Cardiomyopathy V: Interprofessional Care

Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...

Mitral Stenosis III: Medical Management

Mitral Stenosis III: Medical Management

Mitral stenosis, a condition marked by the narrowing of the mitral valve, necessitates an integrated approach for effective management. This approach includes preventative measures, medical therapy, and surgical interventions to reduce symptoms and prevent complications.PreventionPrevention of mitral stenosis primarily focuses on reducing the incidence of bacterial infections, particularly streptococcal infections, which can lead to rheumatic fever and subsequent valvular damage. Timely...

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Related Experiment Video

Updated: Jun 3, 2026

Protocol for Relative Hydrodynamic Assessment of Tri-leaflet Polymer Valves

Protocol for Relative Hydrodynamic Assessment of Tri-leaflet Polymer Valves

Published on: October 17, 2013

Prosthetic heart valves.

C Ryan Longnecker¹, Michael J Lim

¹Division of Cardiology, Department of Internal Medicine, Saint Louis University School of Medicine, 3635 Vista Avenue, 13th Floor, Desloge Towers, St Louis, MO 63110-0250, USA.

Cardiology Clinics

|April 5, 2011

Summary

This summary is machine-generated.

Prosthetic heart valves have advanced significantly since 1952, with mechanical and bioprosthetic options available. This article reviews the hemodynamic challenges of commonly used surgically implanted prosthetic valves.

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Last Updated: Jun 3, 2026

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Area of Science:

Cardiovascular Surgery
Biomedical Engineering
Medical Devices

Background:

The first prosthetic valve implantation occurred in 1952 for aortic insufficiency.
Prosthetic valves have diversified into mechanical and bioprosthetic types.
Surgical implantation remains the primary method for valve replacement.

Observation:

Evolution of prosthetic valves in design and material.
Ongoing advancements in prosthetic heart valve technology.
Prevalence of surgically implanted valves in clinical practice.

Findings:

Discussion of hemodynamic principles relevant to prosthetic valves.
Analysis of commonly implanted prosthetic valve types.
Identification of hemodynamic issues associated with current prosthetic valves.

Implications:

Understanding hemodynamic performance is crucial for prosthetic valve selection.
Potential for improved patient outcomes through optimized valve design.
Guidance for clinicians on managing hemodynamic challenges in prosthetic valve patients.