Feinstruktur der für die Festigkeit und Elastizität der Aortenwand verantwortlichen Kollagenfasern (in grün). In gesunden Arterien ist die parallele Ausrichtung für die mechanische Stabilität ausschlaggebend (oben). Diese Feinstruktur ist in einer erkrankten Aorta dramatisch gestört (unten). Das führt zum Verlust der Elastizität und kann im Extremfall auch zum Durchbruch der Aortenwand (Aneurisma) führen. Die dunklen Bereiche in der unteren Abbildung sind Fetteinlagerungen.
Foto: Dr. Heimo Wolinski
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