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Cardiac MRI (an approach)

Dr Tom Foster and Dr Joachim Feger et al.

A cardiac MRI can be a more or less frequent examination faced in daily practice also depending on the institution. In general radiological practices and institutions other than cardiac imaging centers, cardiac MRI examinations are not necessarily gladly enlisted into the appointment schedule partly due to their sheer time requirements. Therefore their acquisition protocol is usually tailored to the clinical question.

What is presented below is a ’basic approach' for how to organize findings within a radiological report of a cardiac MRI without claim for completeness. This does not cover the workup of every clinical question and every cardiac problem that might be investigated.

Systematic review

Although the clinical question is paramount, many findings and differential diagnosis can be worked off with a few standardized protocols and help the clinician with the further diagnostic process. Thus a systematic review is essential including morphology, function and tissue characteristics.

Morphology

The morphological assessment includes the following:

Function

A left ventricular functional analysis is part of every cardiac MRI and includes the following:

  • contraction pattern: synchrony/dyssynchrony
  • left ventricular end-diastolic diameter
  • left ventricular end-diastolic volume index (LV EDVI) [mL/m2]
  • left ventricular end-systolic volume index (LV ESVI) [mL/m2]
  • left ventricular stroke volume index (LV SVI) [mL/m2]
  • left ventricular ejection fraction (LV EF) [%]
  • left ventricular mass index [g/m2]*
  • left ventricular regional wall motion abnormalities
    • hypokinesia, akinesia, dyskinesia
    • localization according to the 17 segment model
    • left ventricular clefts, cardiac recesses

Optional: (e.g. arrhythmogenic right ventricular cardiomyopathy, valvular disease, pericardial disease)

  • right ventricular end-diastolic diameter
  • right ventricular end-diastolic volume index (RV EDVI) [mL/m2]
  • right ventricular end-systolic volume index (RV ESVI) [mL/m2]
  • right ventricular stroke volume index (RV SVI) [mL/m2]
  • right ventricular ejection fraction (RV EF) [%]
  • right ventricular regional wall motion abnormalities
    • right ventricular aneurysm
Cardiac tissue characterization

The extent of the cardiac tissue characterization module will vary with the clinical question and might include an assessment of the following:

Optional:

Flow measurements

Flow measurements are usually acquired for suspected cardiac shunts and might be acquired in the setting of valvular disease. They might be also acquired in the assessment of hypertrophic cardiomyopathy.

In-plane flow measurements can depict and characterize the direction of flow and shunts.

Through-plane flow measurements are usually conducted in the pulmonary artery and ascending aorta at several locations as well as in the left ventricular outflow tract.

Common pathology

and many more...

Article information

rID: 83395
System: Cardiac
Section: Approach
Tag: cases
Synonyms or Alternate Spellings:
  • Cardiac MRI an approach

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