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Related Concept Videos

Cardiac Catheterization III: Left Heart Catheterization01:24

Cardiac Catheterization III: Left Heart Catheterization

188
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...
188
Cardiac Catheterization II: Right Heart Catheterization01:21

Cardiac Catheterization II: Right Heart Catheterization

137
Right Heart Catheterization: An OverviewRight heart catheterization is an invasive diagnostic procedure that measures right-sided cardiac and pulmonary artery pressures, calculates cardiac output, and identifies intracardiac shunts. It provides detailed hemodynamic data essential for diagnosing and managing various cardiovascular conditions, such as pulmonary hypertension.Access SitesCommon access sites for right heart catheterization include the internal jugular vein in the neck region, the...
137
Diode: Reverse bias01:14

Diode: Reverse bias

907
A diode is reverse-biased when the positive terminal of an external voltage source is connected to the n-type material and the negative terminal to the p-type material. This configuration opposes the natural direction of current flow through the diode, effectively increasing the width of the depletion region and the barrier potential. The reverse bias condition produces a minimal leakage current, primarily due to minority charge carriers. This leakage becomes significant when the reverse...
907

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Related Experiment Video

Updated: Aug 27, 2025

Use of a Percutaneous Ventricular Assist Device/Left Atrium to Femoral Artery Bypass System for Cardiogenic Shock
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Early Experience With Reverse Double Switch Operation for the Borderline Left Heart.

Brandi Braud Scully1, Eric N Feins1, Wayne Tworetzky2

  • 1Department of Cardiac Surgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts.

Seminars in Thoracic and Cardiovascular Surgery
|September 30, 2022
PubMed
Summary

The reverse double switch operation (R-DSO) offers a promising alternative for complex heart conditions in children, showing favorable early outcomes and improved hemodynamics without mortality in a small patient group.

Keywords:
Biventricular repairBorderline left heartSingle ventricle

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Area of Science:

  • Pediatric Cardiology
  • Congenital Heart Surgery
  • Cardiac Physiology

Background:

  • Borderline left hearts present complex surgical challenges.
  • Conventional biventricular repair or single ventricle palliation may not be suitable for all cases.
  • The reverse double switch operation (R-DSO) is an alternative surgical approach.

Purpose of the Study:

  • To review early clinical and hemodynamic outcomes of R-DSO in children with borderline left hearts.
  • To evaluate R-DSO as an alternative to standard surgical treatments.
  • To assess the safety and efficacy of R-DSO in this specific patient population.

Main Methods:

  • Retrospective review of 8 pediatric patients undergoing R-DSO between 2017 and 2021.
  • Collection of patient demographics, surgical details, and early postoperative outcomes.
  • Hemodynamic assessment through follow-up catheterization in a subset of patients.

Main Results:

  • No operative or 30-day postoperative mortality observed.
  • All patients maintained sinus rhythm at discharge with normal left ventricular systolic function.
  • Favorable early hemodynamic results including low inferior vena cava pressures and improved cardiac index were noted.

Conclusions:

  • R-DSO is a viable alternative for borderline left hearts, offering favorable early outcomes.
  • The procedure can potentially relieve pulmonary hypertension and maintain transplant candidacy.
  • Early results suggest R-DSO can lead to improved hemodynamic function and low systemic venous pressures.