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Related Concept Videos

Heart Failure VI: Adjunct Therapies01:22

Heart Failure VI: Adjunct Therapies

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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.
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Cardiomyopathy V: Interprofessional Care01:29

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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...
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Heart Valves01:16

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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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Effects of biventricular shunt on pump characteristics in a maglev total artificial heart.

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Related Experiment Video

Updated: Apr 11, 2026

Use of Two Intracorporeal Ventricular Assist Devices As a Total Artificial Heart
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Total artificial hearts: past, present, and future.

William E Cohn1, Daniel L Timms1, O H Frazier1

  • 1Cardiovascular Surgical Research Laboratory and the Center for Cardiac Support, Texas Heart Institute, MC 2-114A, PO Box 20345, Houston, TX 77225, USA.

Nature Reviews. Cardiology
|June 3, 2015
PubMed
Summary

Developing a practical artificial heart remains a critical challenge. Current research explores both positive-displacement and continuous-flow pumps to improve cardiac support for heart disease patients.

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Last Updated: Apr 11, 2026

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Area of Science:

  • Biomedical Engineering
  • Cardiovascular Research
  • Medical Device Development

Background:

  • Heart disease is a leading cause of death, with a significant shortage of donor hearts for transplantation.
  • Over 50 years of research has focused on developing a functional artificial heart to address this critical need.
  • Early artificial hearts used positive-displacement pumps, offering hemodynamic support but facing challenges with size and durability.

Observation:

  • Continuous-flow blood pumps with rotating impellers, initially developed for left ventricular assist devices, have been integrated into modern artificial hearts.
  • These rotary pumps have achieved moderate clinical success, but their long-term impact is still under evaluation.
  • The necessity of pulsatile circulation, characteristic of native hearts, in artificial heart function remains an open question.

Findings:

  • Early positive-displacement artificial hearts provided short-term circulatory support but were limited by physical constraints and longevity.
  • Modern total artificial hearts incorporating rotary pump technology show promise but have not fully overcome previous limitations.
  • The clinical significance of maintaining pulsatile flow in artificial hearts requires further investigation.

Implications:

  • Further research is essential to refine both positive-displacement and rotary total artificial heart designs.
  • Optimizing artificial heart technology could significantly improve quality of life and survival rates for patients with end-stage heart failure.
  • Understanding the role of pulsatile flow may guide the development of next-generation artificial hearts with enhanced physiological compatibility.