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Chambers of the Heart01:16

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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 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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The heart, an organ critical to survival, gets nourishment not from the blood it pumps but from a separate circulation system known as coronary circulation. This is the shortest circulation in the body and is responsible for supplying the heart with the nutrients it needs to function effectively.
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The human heart is made up of three layers of tissue that are surrounded by the pericardium, a membrane that protects and confines the heart. The outermost layer, closest to the pericardium, is the epicardium. The pericardial cavity separates the pericardium from the epicardium. Beneath the epicardium is the myocardium, the middle layer, and the endocardium, the innermost layer. There are four chambers of the heart: the right atrium, the right ventricle, the left atrium, and the left ventricle.
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Mitral Regurgitation I: Introduction01:20

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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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Right Heart Catheterization: An OverviewRight heart catheterization is an invasive diagnostic procedure that measures right-sided cardiac and pulmonary artery pressures, calculates cardiac output, and identifies intracardiac shunts. It provides detailed hemodynamic data essential for diagnosing and managing various cardiovascular conditions, such as pulmonary hypertension.Access SitesCommon access sites for right heart catheterization include the internal jugular vein in the neck region, the...
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Double-Inlet Left Ventricle.

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  • 1Children's Heart Institute, Children's Memorial Hermann Hospital, McGovern Medical School, University of Texas-Houston, Houston, TX 77030, USA.

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Summary

Double-inlet left ventricle (DILV) is a complex congenital heart defect diagnosed via echo-Doppler. Effective management involves staged surgical procedures like the Fontan operation, improving outcomes for affected infants.

Keywords:
Blalock–Taussig anastomosisFontan surgerybanding of the pulmonary arterybidirectional Glenn operationdouble-inlet left ventricleinter-stage mortalitysingle ventricle

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Area of Science:

  • Pediatric Cardiology
  • Congenital Heart Disease
  • Cardiac Surgery

Background:

  • Double-inlet left ventricle (DILV) is the most common univentricular atrioventricular connection.
  • It involves a single functioning ventricle receiving both atrioventricular valves, often with transposed great vessels and pulmonary stenosis.

Purpose of the Study:

  • To review the diagnosis, pathophysiology, and management of DILV.
  • To describe the staged surgical approach, including the Fontan procedure, for DILV patients.

Main Methods:

  • Diagnosis primarily relies on echocardiography (echo-Doppler studies).
  • Review of current medical, catheter interventional, and surgical treatment practices.

Main Results:

  • DILV anatomy and pathophysiology are well-defined by echo-Doppler.
  • Staged total cavo-pulmonary connection (Fontan procedure) is the standard surgical treatment.
  • Inter-stage mortality and post-Fontan complications are recognized challenges.

Conclusions:

  • DILV is accurately diagnosed using echo-Doppler.
  • Current treatment strategies, including staged surgical palliation, offer effective management for DILV.