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Related Concept Videos

Mitral Stenosis III: Medical Management01:26

Mitral Stenosis III: Medical Management

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Mitral stenosis, a condition marked by the narrowing of the mitral valve, necessitates an integrated approach for effective management. This approach includes preventative measures, medical therapy, and surgical interventions to reduce symptoms and prevent complications.PreventionPrevention of mitral stenosis primarily focuses on reducing the incidence of bacterial infections, particularly streptococcal infections, which can lead to rheumatic fever and subsequent valvular damage. Timely...
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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 Regurgitation III: Medical Management01:25

Mitral Regurgitation III: Medical Management

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Mitral regurgitation (MR) is characterized by retrograde blood circulation from the left ventricle into the left atrium due to inadequate mitral valve closure. The severity of the condition, symptoms, and underlying cause determine treatment strategies.Monitoring and Pharmacological TreatmentPatients with mild to moderate MR typically do not need immediate intervention but regular monitoring to assess progression and guide treatment. Patients with mild MR should have an echocardiogram every 3-5...
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Aortic Regurgitation III: Medical Management01:25

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Aortic regurgitation (AR) is when the aortic valve does not close or seal properly, leading to backward blood circulation from the aorta into the left ventricle during diastole. Common causes of AR include rheumatic heart disease, congenital valve defects, and aortic root dilation. Managing AR requires a multifaceted approach to alleviate symptoms, preserve left ventricular function, and address the underlying cause of the regurgitation. Patients with symptomatic AR or significant left...
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Flow-augmentation bypass for moyamoya disease.

Miki Fujimura1,2, Teiji Tominaga3

  • 1Department of Neurosurgery, Kohnan Hospital, Sendai, Japan - fujimur@nsg.med.tohoku.ac.jp.

Journal of Neurosurgical Sciences
|November 27, 2020
PubMed
Summary
This summary is machine-generated.

Moyamoya disease (MMD) is a rare cerebrovascular condition. Understanding MMD pathology is crucial for surgeons performing bypass procedures to prevent strokes and manage complications.

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Area of Science:

  • Neurology
  • Vascular Surgery
  • Neuroscience

Background:

  • Moyamoya disease (MMD) is a chronic occlusive cerebrovascular disease of unknown cause.
  • It involves progressive stenosis of the internal carotid artery and abnormal collateral vessels at the brain's base.
  • MMD can be idiopathic or secondary to conditions like neurofibromatosis type-1 or Down's syndrome.

Purpose of the Study:

  • To review the standard surgical procedure for Moyamoya disease: superficial temporal artery-middle cerebral artery bypass with indirect pial synangiosis.
  • To discuss technical pitfalls associated with this surgical intervention.
  • To explain the peri-operative hemodynamics of MMD following bypass surgery, including hyper-perfusion and hemodynamic ischemia.

Main Methods:

  • Review of existing literature on Moyamoya disease and surgical interventions.
  • Detailed description of the superficial temporal artery-middle cerebral artery bypass technique.
  • Analysis of peri-operative hemodynamic changes and their implications.

Main Results:

  • Flow-augmentation bypass is beneficial for MMD patients, preventing ischemic attacks and reducing re-bleeding in hemorrhagic cases.
  • Understanding MMD pathology is essential for avoiding complications during bypass surgery.
  • Post-bypass surgery can lead to local cerebral hyper-perfusion and watershed shift phenomenon.

Conclusions:

  • Bypass surgery is increasingly performed worldwide for Moyamoya disease.
  • A thorough understanding of MMD's basic pathology is vital for successful surgical outcomes and complication avoidance.
  • This review aims to enhance comprehension of MMD for improved patient management through flow-augmentation bypass.