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The human heart is a complex organ made up of four chambers: the right and left atria and the right and left ventricles. These internal chambers are separated by partitions known as the interatrial and interventricular septa. The exterior of the heart features a groove known as the coronary sulcus that demarcates the atria from the ventricles, while the anterior and posterior interventricular sulci distinguish between the two ventricles.
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Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
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Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
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Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
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Arrhythmias are disturbances in the heart's rhythm that lead to abnormal heartbeats. These irregularities can originate from different parts of the heart and are classified based on their origin and nature.
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Related Experiment Video

Updated: Dec 26, 2025

Biaxial Mechanical Characterizations of Atrioventricular Heart Valves
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Chordae Willisii Within the Transverse Sinus: Morphologic Study.

Joe Iwanaga1, Evan Courville2, Mahindra Kumar Anand3

  • 1Department of Neurosurgery and Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, Louisiana, USA; Division of Gross and Clinical Anatomy, Department of Anatomy, Kurume University School of Medicine, Kurume, Japan.

World Neurosurgery
|March 17, 2020
PubMed
Summary
This summary is machine-generated.

Chordae Willisii, or trabeculae, are common in transverse sinuses, particularly on the right side. Understanding their anatomy is crucial for interpreting imaging and performing endovascular procedures.

Keywords:
AnatomyEndovascular proceduresIntracranial hypertensionIntradural venous sinusStentingThrombosis

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Area of Science:

  • Neuroanatomy
  • Vascular Anatomy
  • Medical Imaging

Background:

  • Trabeculae within transverse sinuses, known as chordae Willisii, may influence blood flow and thrombus organization.
  • These structures are increasingly visualized with modern imaging and encountered during endovascular procedures.

Purpose of the Study:

  • To conduct a detailed morphologic study of chordae Willisii within the transverse sinus using cadavers.
  • To address the scarcity of comprehensive anatomic data on these intraluminal structures.

Main Methods:

  • Dissection of thirty fresh-frozen cadaveric transverse sinuses.
  • Recording detailed morphology and applying classification schemes based on anatomy and orientation.

Main Results:

  • Chordae Willisii were identified in 70% of dissected sides, with a higher prevalence on the right (86.6%).
  • Three distinct types and three classes of chordae were identified.
  • A statistically significant difference in chordae type was observed between sides (P = 0.02).

Conclusions:

  • A comprehensive anatomic evaluation of transverse sinus chordae Willisii has been lacking.
  • This knowledge is essential for interpreting neuroimaging and for safe navigation during endovascular procedures in the dural venous sinuses.