Related Experiment Video
Updated: Jul 10, 2026
11:12
Protocol for Relative Hydrodynamic Assessment of Tri-leaflet Polymer Valves
Published on: October 17, 2013
Prosthetic heart valves: catering for the few
Peter Zilla1, Johan Brink, Paul Human
1Christian Barnard Department of Cardiothoracic Surgery, University of Cape Town Medical School and Groote Schuur Hospital, Anzio Road, 7925 Observatory, Cape Town, South Africa. peter.zilla@uct.ac.za <peter.zilla@uct.ac.za>
Biomaterials
|October 24, 2007
Summary
Prosthetic heart valves, largely unchanged since the 1960s, offer limited solutions for developing nations. Advances in cardiac surgery have stagnated, leaving many patients with suboptimal valve replacements.
Area of Science:
- Cardiovascular Surgery
- Biomaterials Science
- Medical Device Development
Background:
- Prosthetic heart valves have seen minimal design innovation since the 1960s.
- Current valve prostheses present challenges for developing countries due to age and socioeconomic factors.
- Technological stagnation limits the suitability of existing heart valves for global populations.
Purpose of the Study:
- To analyze the historical development and current limitations of prosthetic heart valves.
- To evaluate the suitability of existing heart valve technologies for diverse global populations, particularly in developing countries.
- To highlight the need for advancements in heart valve prostheses to address unmet clinical needs worldwide.
Main Methods:
- Historical review of prosthetic heart valve design evolution.
- Comparative analysis of valve performance in developed versus developing world contexts.
- Assessment of current and emerging heart valve technologies.
Main Results:
- Mechanical and bioprosthetic heart valves have not significantly advanced in design since the late 1960s.
- Existing prosthetic valves are ill-suited for developing countries due to design limitations and patient demographics.
- Catheter-delivered valves predominantly use bioprosthetic tissue, limiting their accessibility and applicability in resource-limited settings.
Conclusions:
- Prosthetic heart valves remain an exclusive, first-world solution with design-inherent complications.
- The slow pace of innovation disproportionately affects developing nations, where the majority of potential recipients reside.
- Urgent development of more accessible and durable heart valve solutions is critical for global health equity.
More Related Videos
Related Concept Videos
01:16Heart 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...
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...
01:29Cardiomyopathy 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...
01:22Heart 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.
01:26Mitral 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...
01:27Mitral 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...
01:25Mitral Regurgitation III: Medical Management
Mitral regurgitation (MR) is characterized by retrograde blood circulation from the left ventricle into the left atrium due to inadequate mitral valve closure. The severity of the condition, symptoms, and underlying cause determine treatment strategies.Monitoring and Pharmacological TreatmentPatients with mild to moderate MR typically do not need immediate intervention but regular monitoring to assess progression and guide treatment. Patients with mild MR should have an echocardiogram every 3-5...