Pulmonary hypertension MRI: Difference between revisions
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===Role of MRI=== | ===Role of MRI=== | ||
*Accurately evaluation of the size, morphology and function of the right ventricle. | *Accurately evaluation of the size, morphology and function of the right ventricle. | ||
MRI has similar abilities to those of [[echocardiography]] in the diagnosis and treatment of patients with pulmonary hypertension. | **MRI has similar abilities to those of [[echocardiography]] in the diagnosis and treatment of patients with pulmonary hypertension. | ||
*Detection of shunts contributing to pulmonary hypertension. | *Detection of shunts contributing to pulmonary hypertension. | ||
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*Follow-up for right heart [[hemodynamics]]. | *Follow-up for right heart [[hemodynamics]]. | ||
**Poor right ventricular function is indicated by the following according to the ACCF/AHA 2009 Expert consensus document on pulmonary hypertension: | **Poor right ventricular function is indicated by the following according to the ACCF/AHA 2009 Expert consensus document on pulmonary hypertension: | ||
*** '''[[Stroke volume]]''' ≤25ml/m^2. | *** '''[[Stroke volume]]''' ≤25ml/m^2. | ||
***'''Right ventricular [[end-diastolic volume]]''' ≥84ml/m^2( Most appropriate marker of right ventricular failure in the follow-up.) | ***'''Right ventricular [[end-diastolic volume]]''' ≥84ml/m^2( Most appropriate marker of right ventricular failure in the follow-up.) | ||
***'''Left ventricvular [[end-diastolic volume]]''' ≤40ml/m^2 | ***'''Left ventricvular [[end-diastolic volume]]''' ≤40ml/m^2 | ||
*'''Pulmonary artery stiffness''' measured by relative cross sectional area change ≤16% also has implications on mortality rate. | *'''Pulmonary artery stiffness''' measured by relative cross sectional area change ≤16% also has implications on mortality rate. | ||
Revision as of 14:22, 14 October 2012
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Pulmonary Hypertension Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Pulmonary hypertension MRI On the Web |
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American Roentgen Ray Society Images of Pulmonary hypertension MRI |
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Risk calculators and risk factors for Pulmonary hypertension MRI |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1], Richard Channick, M.D.; Assistant Editor(s)-in-Chief: Ralph Matar
Overview
Cardiac MRI is performed in some patients. MRI provides important prognostic indicators regarding the function of right ventricle in patients with pulmonary hypertension.
MRI
Role of MRI
- Accurately evaluation of the size, morphology and function of the right ventricle.
- MRI has similar abilities to those of echocardiography in the diagnosis and treatment of patients with pulmonary hypertension.
- Detection of shunts contributing to pulmonary hypertension.
- Detection of acute and chronic pulmonary thromboembolic disease.
- Differentiation between the pulmonary vasculature and mediastinal adenopathy when used with contrast enhancement.
- Follow-up for right heart hemodynamics.
- Poor right ventricular function is indicated by the following according to the ACCF/AHA 2009 Expert consensus document on pulmonary hypertension:
- Stroke volume ≤25ml/m^2.
- Right ventricular end-diastolic volume ≥84ml/m^2( Most appropriate marker of right ventricular failure in the follow-up.)
- Left ventricvular end-diastolic volume ≤40ml/m^2
- Poor right ventricular function is indicated by the following according to the ACCF/AHA 2009 Expert consensus document on pulmonary hypertension:
- Pulmonary artery stiffness measured by relative cross sectional area change ≤16% also has implications on mortality rate.
MRI Limitations include
- Inability to perform breath hold.
- Incompatible hardware such as neurostimulators, cochlear implants, aneurysm clips, cardiac pacemakers and defibrillators.
- Limited availability and cost.
- Difficulty in assessing PA pressures.