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Related Concept Videos

Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

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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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Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

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Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
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Aneurysm II: Clinical Manifestations and Diagnostic Studies01:21

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Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
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Imaging Studies for Cardiovascular System III: X-Ray01:20

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The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
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Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

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Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
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Acute Coronary Syndrome III: Diagnostic Studies01:30

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Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
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Cardiac Imaging for Assessing Low-Gradient Severe Aortic Stenosis.

Marie-Annick Clavel1, Ian G Burwash2, Philippe Pibarot1

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Diagnosing low-gradient aortic stenosis (AS) is challenging. Multimodality imaging aids in identifying severe AS in these patients, guiding treatment decisions like aortic valve replacement (AVR).

Keywords:
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Area of Science:

  • Cardiology
  • Medical Imaging

Background:

  • Aortic stenosis (AS) diagnosis can be complicated by discordant echocardiographic findings.
  • Low-gradient AS, characterized by a small valve area and low pressure gradient, presents a diagnostic challenge, affecting up to 40% of AS patients.

Purpose of the Study:

  • To elucidate the role of multimodality imaging in managing patients with low-gradient AS.
  • To differentiate subtypes of low-gradient AS and their prognostic implications.

Main Methods:

  • Utilizing Doppler-echocardiography to classify low-gradient AS into low-flow, paradoxical low-flow, or normal-flow subtypes.
  • Employing multimodality imaging, including low-dose dobutamine stress echocardiography and CT-based calcium scoring, to confirm severe AS.

Main Results:

  • Low-flow, low-gradient AS is associated with a poorer prognosis compared to high-gradient or normal-flow, low-gradient AS.
  • Multimodality imaging is crucial for accurate diagnosis of severe AS in patients with low-gradient AS.

Conclusions:

  • Patients with confirmed severe low-gradient AS benefit from aortic valve replacement (AVR).
  • Transcatheter AVR may offer advantages over surgical AVR in specific low-gradient AS populations.
  • Further research is needed to optimize AVR strategies and identify futility in selected patients.