Mid-Field Cardiovascular MRI in Class III Obesity

Figures

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  Visual Summary. Mid-Field, Wide-Bore CMR/MRA in Patients With Cardiac Comorbidities and Class III Obesity CMR = cardiovascular magnetic resonance; MRA = magnetic resonance angiography.

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  Figure 1. Heart Failure Etiology Mid short-axis (A) and 4-chamber (B) balanced steady-state free precession cine images. Quantitative myocardial T1 (C) and T2 maps (D and E), and late gadolinium enhanced images (F and G) demonstrate normal myocardial tissue characteristics. The PFO occluder is visualized on (B). LA = left atrium; LGE = late gadolinium enhancement; LV = left ventricle; PFO = patent foramen ovale; RA = right atrium; RV = right ventricle.

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  Figure 2. Ventricular Arrhythmia Etiology Basal, apical, and 3-chamber short-axis cine images (A-C; acquired after gadolinium contrast) suggestive of right ventricular outflow tract (RVOT) fibrosis (white arrow) and midmyocardial fat (black arrow), also visualized on corresponding late gadolinium enhanced images (D to F). Mid short-axis T1 (G) and T2 (H) maps demonstrate normal tissue characteristics. Midmyocardial fat presence confirmed on out-of-phase gradient-recalled echo image (I). LA = left atrium; LGE = late gadolinium enhancement; LV = left ventricle; RV = right ventricle.

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  Figure 3. Congenital Valve Defect: Bicuspid Aortic Valve Cine (A and B), quantitative T1 map (C), late gadolinium enhanced (LGE) images (D and E), and quantitative T2 map (F) show normal cardiac function and tissue characteristics. Bicuspid valve morphology was visualized on gradient-recalled echo (GRE) cine (G, white asterisk). Aortic flow from phase-contrast magnetic resonance images (H). Three-chamber cine images show asymmetric valve opening in systole (I, black arrow) and trivial aortic regurgitation in diastole (J, black asterisk). Magnetic resonance angiography (K) showed a dilated aortic root and proximal ascending aorta (cross section in inset, white asterisk). Ao = aorta; AV = aortic valve; LA = left atrium; LV = left ventricle; MRA = magnetic resonance angiography; RA = right atrium; RV = right ventricle.

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  Figure 4. Postrepair Monitoring in Congenital Heart Disease Ferumoxytol-enhanced gradient recalled echo (GRE) 2-chamber (A) and 4-chamber (B) cine images showed low-normal function, while an intact aortic graft with mildly dilated aortic root was visualized on magnetic resonance angiography (C, white arrow). Additionally, reformatted views from 5D cine images (D to F) demonstrate enhanced visualization of prosthetic leaflet motion (black arrows) compared to corresponding 2D cine images (G to I). Ao = Aorta; AV = aortic valve; LA = left atrium; LV = left ventricle; MRA = magnetic resonance angiography; RA = right atrium; RV = right ventricle.

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  Figure 5. Congenital Valve Defect: Unicuspid Aortic Valve Two-chamber (A) and 4-chamber (B) cine images show normal biventricular function, while cine images of the aortic valve (C and D) demonstrate unicuspid valve morphology (white asterisk). Mild to moderate aortic regurgitation was determined from phase-contrast (PC) magnetic resonance images (E and F), and the aortic dimensions were assessed to be normal for magnetic resonance angiography (G). Ao = aorta; AV = aortic valve; LA = left atrium; LV = left ventricle; MRA = magnetic resonance angiography; PC MRI = phase contrast magnetic resonance image; RA = right atrium; RV = right ventricle.