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Related Concept Videos

The Aorta01:14

The Aorta

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The aorta is the largest artery in the human body. It originates from the left ventricle of the heart and extends down to the abdomen, where it splits into two smaller arteries. Structurally, it can be divided into four main parts: the ascending aorta, the aortic arch, the thoracic aorta, and the abdominal aorta.
The average diameter of the aorta is approximately 2-3 cm, but the size can vary depending on the section of the aorta and the individual's age, sex, and body size. The aorta is...
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The Arch of Aorta01:10

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The coronary arteries, originating from the ascending aorta, bifurcate from two sinuses located within the ascending aorta. Positioned just above the aortic semilunar valve, these sinuses house essential aortic baroreceptors and chemoreceptors, crucial for maintaining cardiac function. The left coronary artery and the right coronary artery branch off from the left posterior and anterior aortic sinuses, respectively.
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The thoracic section of the aorta begins at the T5 vertebra and extends to the T12 level at the diaphragm, initially progressing through the mediastinum to the left of the spinal column. Throughout its course in the thoracic segment, the thoracic aorta emits various offshoots known collectively as visceral and parietal branches. The branches that predominantly supply blood to visceral organs are termed visceral branches and include bronchial, pericardial, esophageal, and mediastinal arteries,...
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Abdominal Aorta01:25

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Once the aorta traverses the diaphragmatic plane at the aortic hiatus, it is known as the abdominal aorta. This anatomical structure is positioned leftward of the spinal column, encased within a cocoon of adipose tissue behind the peritoneal cavity. It terminates at the L4 vertebra, where it splits into the common iliac arteries. Prior to this bifurcation, the abdominal aorta gives rise to several vital branches.
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Operational Amplifiers01:17

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The operational amplifier, often referred to as an op-amp, is a multifaceted building block of a circuit. This electronic component functions like a voltage-controlled voltage source and can also be used to create a voltage- or current-controlled current source. The design of an operational amplifier enables it to execute mathematical operations when external components like resistors and capacitors are linked to its terminals. An op-amp has the capacity to sum signals, amplify a signal,...
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Vectors are physical quantities that have both magnitude and direction. The vector operations include addition, subtraction, and scalar multiplication.
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Blood Circuit Reconstruction in an Abdominal Mouse Heart Transplantation Model
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[Hemorheological changes at reconstructive operations on the aorta].

Iu A Morozov1, E V Roĭtman

  • 1Laboratory for Rapid Diagnosis, Russian Scientific Center of Surgery, Russian Academy of Medical Sciences, Moscow, Russia.

Angiologiia I Sosudistaia Khirurgiia = Angiology and Vascular Surgery
|December 6, 2003
PubMed
Summary

Post-aortic reconstruction surgery, hemorheologic changes were observed. Complications correlated with increased blood viscosity and erythrocyte aggregation, impacting patient recovery.

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Area of Science:

  • Cardiovascular Surgery
  • Hemorheology
  • Biomedical Engineering

Context:

  • Aortic reconstruction surgery involves complex physiological changes.
  • Hemorheologic parameters are crucial indicators of vascular health.
  • Monitoring blood flow properties post-surgery aids in understanding patient outcomes.

Purpose:

  • To investigate hemorheologic alterations following aortic reconstruction.
  • To correlate these changes with surgical outcomes and complications.
  • To assess blood viscosity, erythrocyte aggregation, and plasma properties.

Summary:

  • Hemorheologic studies were conducted on 15 patients undergoing aortic reconstruction at various surgical stages.
  • Blood viscosity, suspension stability, caisson viscosity (CV), and yield stress (YS) were measured.
  • Erythrocyte aggregation indices, including times for aggregate formation (T(1), T(2)), aggregate size (Ampl), and strength (Beta, Ia((2,5))), were evaluated.
  • Initially normal blood viscosity increased post-operatively, especially in patients with complications.
  • Erythrocyte aggregation decreased at the end of surgery but increased post-operatively, particularly in complicated cases.
  • Plasma viscosity and yield stress showed distinct patterns between uncomplicated and complicated recoveries.

Impact:

  • Findings highlight the significance of hemorheologic monitoring in predicting post-aortic reconstruction complications.
  • Understanding these changes can guide clinical management and improve patient care strategies.
  • This research contributes to the field of vascular surgery and hemorheology.