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Related Concept Videos

Mismatch Repair01:36

Mismatch Repair

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Mismatch Repair01:20

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Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
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The heart, an organ critical to survival, gets nourishment not from the blood it pumps but from a separate circulation system known as coronary circulation. This is the shortest circulation in the body and is responsible for supplying the heart with the nutrients it needs to function effectively.
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Continuous Renal Replacement Therapy, also known as CRRT, is a procedural treatment for acute kidney injury (AKI) that gradually removes uremic toxins and fluids while maintaining acid-base balance and stabilizing electrolytes. It is particularly useful for hemodynamically unstable patients. Unlike intermittent hemodialysis, which is faster, CRRT provides a gentler approach over 24 hours, closely mimicking the function of natural kidneys. However, CRRT is not ideal for patients with...
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Root Mean Square00:57

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If in an experiment, data values have a probability of being both positive and negative, neither the arithmetic mean, the geometric mean, nor the harmonic mean can be used to calculate the central tendency of the data set. In particular, if the positive and negative values are equally likely, the arithmetic mean is close to zero.
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Related Experiment Video

Updated: Feb 14, 2026

Full-root Aortic Valve Replacement by Stentless Aortic Xenografts in Patients with Small Aortic Roots
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Modified Coronary Reimplantation for Small Aortic Root Replacement Mismatch.

Marco Pocar1, Davide Passolunghi2, Maria Clemencia Araujo Dos Anjos2

  • 1IRCCS MultiMedica Hospital, Milan, Italy; Università degli Studi di Milano, Milan, Italy.

The Annals of Thoracic Surgery
|February 8, 2018
PubMed
Summary

This study presents a modified coronary reimplantation technique for aortic root replacement, simplifying the procedure in small aortic roots. The technique creates wide neo-ostia with less prosthetic material, enhancing surgical outcomes.

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Area of Science:

  • Cardiovascular Surgery
  • Thoracic Surgery
  • Cardiac Surgery

Background:

  • Coronary reimplantation is a critical yet challenging step in aortic root replacement surgery.
  • Reoperations pose unique difficulties, particularly in mobilizing and reattaching coronary ostia, often necessitating interposition grafts to prevent tension.

Observation:

  • Mobilizing coronary ostia during reoperations for aortic root replacement can be hazardous.
  • Existing techniques may require extensive prosthetic material or grafts to avoid tension during coronary reattachment.

Findings:

  • A modified coronary reimplantation technique is introduced for aortic root replacement.
  • This technique facilitates the creation of wide neo-ostia with reduced reliance on prosthetic material.
  • The method is particularly advantageous in cases involving a small aortic root.

Implications:

  • The modified technique offers a potentially safer and more efficient approach to coronary reimplantation.
  • It may reduce complications associated with tension and the need for interposition grafts.
  • This innovation could improve outcomes for patients undergoing aortic root replacement, especially in complex reoperative scenarios.