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Related Concept Videos

Heart Failure V: Medical Management01:30

Heart Failure V: Medical Management

Medical Management of Acute Decompensated Heart Failure (ADHF)The primary goals of therapy for patients hospitalized with acute decompensated heart failure (ADHF) include:Relieving symptomsOptimizing volume statusSupporting oxygenation and ventilationMaintaining cardiac output (CO) and end-organ perfusionIdentifying and addressing the cause of ADHFPreventing complicationsProviding patient education on factors precipitating HF exacerbationPlanning for dischargeOngoing monitoring and assessment...
Heart Failure VI: Adjunct Therapies01:22

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.
Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...

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Related Experiment Video

Updated: Jun 29, 2026

Use of Two Intracorporeal Ventricular Assist Devices As a Total Artificial Heart
08:49

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Series Multiblood Pump Design With Dual Activation for Pediatric Patients With Heart Failure.

Thomas C Palazzolo1, Harutyun Sarkisyan1, Giselle C Matlis1

  • 1From the BioCirc Research Laboratory, School of Biomedical Engineering, Science, and Health Systems, Drexel University, Philadelphia, Pennsylvania.

ASAIO Journal (American Society for Artificial Internal Organs : 1992)
|September 10, 2024
PubMed
Summary

This study introduces the Drexel Double-Dragon VAD, a novel pediatric ventricular assist device (VAD) with a dual-pump system. Computational and in vitro tests validated its design, showing promise for improving pediatric cardiac support.

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Area of Science:

  • Biomedical Engineering
  • Pediatric Cardiology
  • Medical Device Development

Background:

  • Pediatric ventricular assist devices (VADs) development lags adult options, impacting patient outcomes.
  • A novel series-flow, double-blood pump VAD is under development to address this gap.
  • The device integrates axial and centrifugal pumps for adaptable pediatric circulatory support.

Purpose of the Study:

  • To refine the design of a novel pediatric VAD, the Drexel Double-Dragon VAD.
  • To analyze and improve the device's flow paths using computational methods and in vitro testing.
  • To evaluate the prototype's pressure-flow generation, fluid stresses, and blood damage potential.

Main Methods:

  • Computational fluid dynamics (CFD) using shear stress transport (SST) models for flow path analysis.
  • In vitro hydraulic testing of a prototype device.
  • Estimation of pressure-flow, fluid scalar stresses, and blood damage levels.

Main Results:

  • In vitro hydraulic tests showed good correlation with SST predictions (4.5% average deviation).
  • The device's performance followed expected pump trends.
  • Blood damage levels in blade tip clearances exceeded targets, requiring further investigation.

Conclusions:

  • The study validates the design foundation for the Drexel Double-Dragon VAD.
  • The computational and in vitro data support the device's potential for pediatric circulatory assistance.
  • Further design iterations are needed to address blood damage in specific areas.