Pulmonary hypertension MRI: Difference between revisions
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1-Accurately evaluate the size, morphology and function of the right ventricle. | 1-Accurately evaluate 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. | ||
2-Detect shunts contributing to pulmonary hypertension. | 2-Detect shunts contributing to pulmonary hypertension. | ||
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3-Detect acute and chronic pulmonary thromboembolic disease. | 3-Detect acute and chronic pulmonary thromboembolic disease. | ||
4-Distinguish between the pulmonary vasculature and mediastinal adenopathy when used with contrast enhancement. | 4-Distinguish between the pulmonary vasculature and [[mediastinal]] [[adenopathy]] when used with contrast enhancement. | ||
5-Also used for follow-up of right heart hemodynamics for follow-up purposes. | 5-Also used for follow-up of right heart [[hemodynamics]] for follow-up purposes. | ||
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 | ||
*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. | ||
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===MRI Limitations include=== | ===MRI Limitations include=== | ||
1- Inability to perform breath hold. | 1-Inability to perform breath hold. | ||
2-Claustrophobia. | 2-[[Claustrophobia]]. | ||
3- Incompatible hardware such as neurostimulators, cochlear | 3-Incompatible hardware such as neurostimulators, [[cochlear implant]]s, aneurysm clips, cardiac pacemakers and [[defibrillator]]s. | ||
4- Limited availability and cost. | 4- Limited availability and cost. | ||
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{{WikiDoc Help Menu}} | {{WikiDoc Help Menu}} | ||
{{WikiDoc Sources}} | {{WikiDoc Sources}} | ||
[[Category:Cardiology]] | |||
[[Category:Pulmonology]] | |||
[[Category:Disease]] | |||
[[Category:Mature chapter]] | |||
Revision as of 17:59, 25 September 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
MRI
Due to the important prognostic indicators of the function of the right ventricle in patients with PAH. Cardiac MR is performed in some patients to:
1-Accurately evaluate 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.
2-Detect shunts contributing to pulmonary hypertension.
3-Detect acute and chronic pulmonary thromboembolic disease.
4-Distinguish between the pulmonary vasculature and mediastinal adenopathy when used with contrast enhancement.
5-Also used for follow-up of right heart hemodynamics for follow-up purposes.
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
- MRI has similar abilities to those of echocardiography in the diagnosis and treatment of patients with pulmonary hypertension.
- Pulmonary artery stiffness measured by relative cross sectional area change ≤16% also has implications on mortality rate.
MRI Limitations include
1-Inability to perform breath hold.
3-Incompatible hardware such as neurostimulators, cochlear implants, aneurysm clips, cardiac pacemakers and defibrillators.
4- Limited availability and cost.
5- Difficulty in assessing PA pressures.