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Related Concept Videos

Imaging Studies for Cardiovascular System V: CT01:28

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Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
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Cardiac catheterization is an invasive diagnostic technique used to identify and evaluate structural and functional diseases of the heart and major blood vessels. This technique diagnoses congenital heart disease, coronary artery disease, valvular heart disease, and coronary spasms and assesses ventricular function. It helps guide treatment decisions, including the need for revascularization procedures like percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG) and...
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Left heart catheterization is an invasive diagnostic procedure used to evaluate the function and structure of the left side of the heart. It is generally performed to diagnose and treat cardiovascular conditions such as valve abnormalities, coronary artery disease, and congenital heart defects.Diagnostic and therapeutic purposesLeft heart catheterization serves various diagnostic and therapeutic purposes, including:Assessing coronary artery bypass grafts.Evaluating coronary artery disease in...
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Related Experiment Video

Updated: Dec 25, 2025

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
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Left Atrial Appendage Mechanical Exclusion: Procedural Planning Using Cardiovascular Computed Tomographic

Ashley Prosper1, Jerold Shinbane2, Ana Maliglig3

  • 1Department of Radiological Sciences, University of California.

Journal of Thoracic Imaging
|April 3, 2020
PubMed
Summary

Left atrial appendage (LAA) mechanical exclusion offers nonpharmacologic stroke risk reduction for atrial fibrillation patients. Imaging like CT angiography aids in planning and assessing LAA exclusion procedures for optimal outcomes.

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Area of Science:

  • Cardiology
  • Medical Imaging
  • Interventional Procedures

Background:

  • Atrial fibrillation (AF) patients face stroke risks, with left atrial appendage (LAA) mechanical exclusion emerging as a non-pharmacologic strategy.
  • Various LAA exclusion techniques are under development, each requiring specific patient anatomy for efficacy.

Purpose of the Study:

  • To review imaging modalities and procedural approaches for LAA mechanical exclusion.
  • To highlight the role of cardiovascular imaging in preprocedural planning and postprocedural assessment.

Main Methods:

  • Review of imaging modalities including transesophageal echocardiography and cardiovascular computed tomographic angiography (CCTA).
  • Discussion of diverse LAA exclusion methods: endovascular occlusion, epicardial ligation, thoracoscopic ligation/appendectomy, and surgical closure.
  • Emphasis on imaging for assessing LAA size, anatomy, and potential obstacles.

Main Results:

  • CCTA serves as a 'virtual patient avatar' for detailed preprocedural assessment of cardiac and surrounding anatomy.
  • Transesophageal echocardiography is crucial for intraprocedural guidance.
  • Successful LAA exclusion aims for complete appendage isolation, avoiding residual stumps or flow and protecting adjacent structures.

Conclusions:

  • Cardiovascular imagers are vital for pre- and postprocedural evaluation of patients undergoing LAA exclusion.
  • Accurate imaging facilitates optimal technique selection and procedural success in LAA mechanical exclusion.