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Related Concept Videos

Dialysis01:27

Dialysis

244
Renal failure occurs when the kidneys lose their ability to filter waste products from the blood effectively. It can be classified into two types: acute renal failure (ARF) and chronic renal failure (CRF).
Acute kidney injury develops suddenly and can be caused by pre-renal causes (e.g., hypovolemia, shock), intrinsic renal causes (e.g., acute tubular necrosis), or post-renal causes (e.g., urinary obstruction). In contrast, chronic renal failure progresses gradually over time and is often...
244
Heart Failure Drugs: Diuretics01:22

Heart Failure Drugs: Diuretics

309
Heart failure and kidney perfusion are interconnected in a complex way. Reduced renal perfusion and venous congestion are two significant factors that contribute to renal dysfunction in heart failure. The kidneys, primarily responsible for fluid balance in the body, are adversely affected due to compromised cardiac output and increased venous pressure. In response to reduced renal perfusion, the kidneys activate neurohumoral mechanisms to restore balance. However, these mechanisms can be...
309

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Related Experiment Video

Updated: May 20, 2025

Normothermic Ex Situ Heart Perfusion in Working Mode: Assessment of Cardiac Function and Metabolism
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Published on: January 12, 2019

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Dialysis preserves heart function during ex situ heart perfusion.

Frank Yu1, Roberto Ribeiro1, Roizar Rosales1

  • 1Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada.

JHLT Open
|March 27, 2025
PubMed
Summary

Adding dialysis to ex situ heart perfusion (ESHP) significantly improved cardiac function and coronary vasoreactivity in donor hearts. This combination enhances myocardial preservation, potentially extending perfusion times for heart transplantation.

Keywords:
DCDdialysisex situ heart perfusionheart functionheart transplantation

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Area of Science:

  • Cardiovascular Surgery
  • Organ Transplantation
  • Cardioprotection

Background:

  • Ex situ heart perfusion (ESHP) is used to optimize donor hearts for transplantation.
  • Myocardial edema and cardiac function deterioration are common challenges during ESHP.
  • Dialysis integration into ESHP may offer improved cardiac preservation.

Purpose of the Study:

  • To evaluate the impact of adding dialysis to ESHP on cardiac function and preservation.
  • To assess the effects of dialysis during ESHP on coronary vasomotor function and myocardial tissue health.

Main Methods:

  • Male Yorkshire pig hearts underwent 8-hour ESHP with or without dialysis.
  • Hearts were supported in nonworking and working modes, with pressure-volume loops analyzed.
  • Coronary vasomotor function, mitochondrial function, oxidative stress, and inflammation were assessed via tissue biopsies.

Main Results:

  • Dialysis significantly enhanced cardiac function, improving key hemodynamic parameters like preload recruitable stroke work and maximal elastance.
  • Coronary vasomotor function improved significantly in the dialysis group, showing enhanced endothelium-dependent and independent vasorelaxation.
  • Dialyzed hearts exhibited reduced sensitivity to endothelin-1 and significant alterations in related protein expression and oxidative stress markers.

Conclusions:

  • Combining dialysis with ESHP substantially improves myocardial preservation and coronary vasomotor function.
  • This integrated approach may enable longer perfusion times for donor hearts, benefiting transplantation outcomes.