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Related Concept Videos

Cardiac Catheterization III: Left Heart Catheterization01:24

Cardiac Catheterization III: Left Heart Catheterization

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Left heart catheterization is an invasive diagnostic procedure used to evaluate the function and structure of the left side of the heart. It is generally performed to diagnose and treat cardiovascular conditions such as valve abnormalities, coronary artery disease, and congenital heart defects.Diagnostic and therapeutic purposesLeft heart catheterization serves various diagnostic and therapeutic purposes, including:Assessing coronary artery bypass grafts.Evaluating coronary artery disease in...
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Nursing responsibilities before cardiac catheterization include:Assess for allergies and establish baseline health status.Before cardiac catheterization, assess the patient for allergies to contrast dye. Perform a comprehensive baseline assessment, including vital signs, heart and breath sounds, and a neurovascular assessment of the extremities, noting distal pulses, skin color, and temperature. Instruct the patient to fast for 8-12 hours before the procedure. Evaluate baseline laboratory...
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Cardiac output (CO), the amount of blood the heart pumps per minute, is a parameter in cardiovascular physiology determined by stroke volume and heart rate. Stroke volume, the amount of blood pushed from one of the ventricles per heartbeat, is influenced by preload, afterload, and contractility.
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Related Experiment Video

Updated: Aug 7, 2025

Insertion, Maintenance, and Removal of the Percutaneous Dual Lumen Cannula Right Ventricular Assist Device
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Outflow cannula alignment in continuous flow left ventricular devices is associated with stroke.

Mahwash Kassi1, Tanushree Agrawal2, Jiaqiong Xu3

  • 1Houston Methodist Hospital, Houston, TX, USA.

The International Journal of Artificial Organs
|March 10, 2023
PubMed
Summary

Left ventricular assist device (LVAD) cannula alignment impacts stroke risk. Specific angles and diameters are linked to higher stroke incidence, suggesting a need for optimized graft configurations.

Keywords:
Outflow cannula, left ventricular devices, strokeartificial kidney, apheresis, & detoxification techniquesartificial kidney, apheresis, & detoxification techniques, echocardiography, cardiac computed tomography, cardiac imaging

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Area of Science:

  • Cardiology
  • Medical Devices
  • Neurology

Background:

  • Stroke is a significant complication following left ventricular assist device (LVAD) implantation.
  • Clinical data on the contribution of LVAD cannula alignment to stroke risk is limited.

Purpose of the Study:

  • To investigate the association between left ventricular assist device (LVAD) cannula alignment and stroke occurrence.
  • To identify specific anatomical configurations of LVAD grafts that may increase stroke risk.

Main Methods:

  • Retrospective analysis of 78 patients who underwent LVAD implantation and cardiac CT scan.
  • Evaluation of LVAD graft alignment using X-ray, echocardiography, and cardiac CT.
  • Primary outcome assessed was stroke within one year of LVAD implantation.

Main Results:

  • 15.4% of patients experienced a stroke within one year of LVAD implantation.
  • Lower LVAD outflow cannula to aortic angle (<37.5°) and smaller outflow graft diameter (<1.5 cm) were significantly associated with higher stroke risk.
  • In Heart Mate II device recipients, lower LVAD speed at CT scan correlated with increased stroke risk.

Conclusions:

  • LVAD outflow cannula alignment and graft diameter are critical factors influencing stroke risk.
  • Optimizing LVAD graft configuration may be a strategy to mitigate stroke complications.
  • Further research is warranted to establish optimal outflow graft parameters for stroke prevention.