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Characterization of the vasa vasorum in the human great saphenous vein: a scanning electron microscopy and
Markus Herbst1, Thomas Joachim Hölzenbein2, Bernd Minnich1
11Department of Cell Biology,Division of Animal Structure & Function,Vascular & Exercise Biology Unit,University of Salzburg,5020 Salzburg,Austria.
Insights
This study details the microvascular structure of the vasa vasorum (VV) in the human great saphenous vein (HGSV). Understanding VV geometry can help identify vital HGSV segments for improved coronary bypass graft outcomes.
Area of Science:
- Vascular Biology
- Anatomy
- Biomedical Engineering
Background:
- The vasa vasorum (VV) supply nutrients to the walls of large blood vessels.
- The human great saphenous vein (HGSV) is commonly used for coronary artery bypass grafting.
- Understanding the structural integrity of the HGSV's VV is crucial for graft longevity.
Purpose of the Study:
- To meticulously analyze the three-dimensional microvascular architecture of the VV in the HGSV.
- To provide detailed quantitative data on VV geometry.
- To identify vital HGSV segments for enhanced coronary bypass surgery outcomes.
Main Methods:
- Scanning electron microscopy of explanted HGSV segments.
- Three-dimensional morphometry of microvascular corrosion casts.
- Detailed analysis of vascular parameters including diameter, interbranching, and branching angles.
Main Results:
- Comprehensive quantitative data on the geometry of the HGSV's VV.
- Insight into vascular parameters across different levels and parts of the HGSV.
- Examination of bifurcation geometry to assess physiological optimality principles.
Conclusions:
- This study provides unprecedented quantitative insights into the HGSV vasa vasorum angioarchitecture.
- The findings offer a basis for understanding HGSV viability in health and disease.
- Optimizing the use of HGSV in bypass grafts may be improved by considering VV structural characteristics.
Abstract:
The vasa vasorum (VV) of explanted segments of the human great saphenous vein (Vena saphena magna; HGSV), harvested during dissection for coronary bypass grafts or diseased vein segments from the "Salzburger Landesklinikum," were studied by scanning electron microscopy and three-dimensional morphometry of microvascular corrosion casts. The main objective of this study was to examine the VV's structural arrangement in order to find the most vital segments of the HGSV and in turn to improve the results of coronary bypass surgeries. The study presents a meticulous analysis of the whole microvascular system of the VV of the HGSV and its three-dimensional arrangement. It is one of the first studies yielding detailed quantitative data on geometry of the VV of the HGSV. A detailed insight into different vascular parameters such as vessel diameter, interbranching, intervascular distances, and branching angles at different levels of the VV's angioarchitecture and in different parts of the HGSV in health and disease is given. Further, the geometry of bifurcations was examined in order to compute the physiological optimality principles of this delicate vascular system based on its construction, maintenance, and function.
