Cardiac MRI

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Cardiac MRI

Cardiac Magnetic Resonance Imaging (MRI) is a non-invasive imaging technology that provides detailed images of the heart and its surrounding structures. It is a powerful tool used in the diagnosis and management of various cardiovascular diseases.

Overview[edit]

Cardiac MRI uses strong magnetic fields and radio waves to generate images of the heart. Unlike X-ray or CT scan, MRI does not use ionizing radiation, making it a safer option for repeated imaging. The technique is particularly useful for assessing cardiac anatomy, function, and tissue characterization.

Indications[edit]

Cardiac MRI is indicated in a variety of clinical scenarios, including:

  • Evaluation of cardiomyopathy
  • Assessment of myocardial viability in patients with coronary artery disease
  • Congenital heart disease evaluation
  • Detection of cardiac masses
  • Assessment of pericardial diseases
  • Evaluation of valvular heart disease

Technique[edit]

The procedure involves the patient lying in a large, cylindrical magnet. Electrocardiogram (ECG) leads are attached to the patient to synchronize image acquisition with the cardiac cycle. A contrast agent, such as gadolinium, may be administered intravenously to enhance image quality.

Image Acquisition[edit]

Cardiac MRI sequences include:

Advantages[edit]

Cardiac MRI offers several advantages over other imaging modalities:

  • Superior soft tissue contrast
  • Ability to image in any plane
  • No exposure to ionizing radiation
  • Comprehensive assessment of cardiac structure and function

Limitations[edit]

Despite its advantages, cardiac MRI has some limitations:

  • High cost and limited availability
  • Contraindications in patients with certain implants or devices
  • Long scan times, which may be uncomfortable for some patients

Safety[edit]

Cardiac MRI is generally safe, but precautions are necessary for patients with metallic implants, such as pacemakers or defibrillators. Gadolinium-based contrast agents are contraindicated in patients with severe renal impairment due to the risk of nephrogenic systemic fibrosis.

Also see[edit]


Cardiovascular disease A-Z

Most common cardiac diseases

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