Specifics of cardiac magnetic resonance imaging in children

Bonnemains, Laurent; Raimondi, Francesca; Odille, Freddy

doi:10.1016/j.acvd.2015.11.004

Cited by 8 publications

(6 citation statements)

References 27 publications

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“…Unlike echocardiography, CMR has the ability to obtain high-resolution tomographic imaging of the heart providing high-quality images that allow a comprehensive cardiological assessment in children, adding important data in terms of anatomy, hemodynamics and function [1]. In addition CMR can characterize myocardial tissue, and assess myocardial viability and perfusion [1].…”

Section: Cardiac Magnetic Resonance (Cmr)mentioning

confidence: 99%

“…Analysing the same zone on T1 and T2 maps can recognize each tissue (fat low T1/ high T2; fibrosis high T1; edema high T1/ high T2). The use of a contrast agents such as gadolinium is recommended to increase the contrast between normal and pathologic myocardium [1,3].…”

Section: Tissue Characterizationmentioning

confidence: 99%

“…LGE sequences are possible because of the property of gadolinium to shorten the T1-relaxation and increase the signal intensity on T1-weighted images (hyperenhancement). The most widely used sequence for the evaluation of LGE is a two-dimensional T1-weighted, ECG gated, inversion recovery, spoiled gradient echo sequence [1].…”

Section: Late Gadolinium Enhancement (Lge; Figure 1)mentioning

confidence: 99%

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Clinical Applications of Late Gadolinium in Children

Rodríguez-González¹,

Castellano-Martínez²

2018

ARC Journal of Pediatrics

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Section: Cardiac Magnetic Resonance (Cmr)mentioning

confidence: 99%

Section: Tissue Characterizationmentioning

confidence: 99%

Section: Late Gadolinium Enhancement (Lge; Figure 1)mentioning

confidence: 99%

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Clinical Applications of Late Gadolinium in Children

Rodríguez-González¹,

Castellano-Martínez²

2018

ARC Journal of Pediatrics

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“…Diagnostic CMR imaging in children generally requires higher temporal and spatial resolution compared with adults given their smaller hearts and faster heart rates. 15 Presence and conspicuity of acute ventricular tachycardia ablation lesions has thus far not been demonstrated. This pilot study therefore aimed to determine whether acute ventricular ablation lesions can be visualized by CMR in the pediatric population, and whether CMR lesion presence correlates with clinical outcomes.…”

Section: Acute Pediatric Vt Ablation Cardiac Mri Assessment Backgroumentioning

confidence: 99%

“…Diagnostic CMR imaging in children generally requires higher temporal and spatial resolution compared with adults given their smaller hearts and faster heart rates . Presence and conspicuity of acute ventricular tachycardia ablation lesions has thus far not been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Acute Cardiac MRI Assessment of Radiofrequency Ablation Lesions for Pediatric Ventricular Arrhythmia: Feasibility and Clinical Correlation

Grant

Berul

Cross

et al. 2017

Cardiovasc electrophysiol

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Background Arrhythmia ablation with current techniques is not universally successful. Inadequate ablation lesion formation may be responsible for some arrhythmia recurrences. Peri-procedural visualization of ablation lesions may identify inadequate lesions and gaps to guide further ablation and reduce risk of arrhythmia recurrence. Methods This feasibility study assessed acute post-procedure ablation lesions by MRI, and correlated these findings with clinical outcomes. Ten pediatric patients who underwent ventricular tachycardia ablation were transferred immediately post-ablation to a 1.5T MRI scanner and late gadolinium enhancement (LGE) imaging was performed to characterize ablation lesions. Immediate and mid-term arrhythmia recurrences were assessed. Results Patient characteristics include median age 14 years (1 – 18 years), median weight 52 kg (11 – 81kg), normal cardiac anatomy (n = 6), d-transposition of great arteries post arterial switch repair (n = 2), anomalous coronary artery origin post repair (n = 1), and cardiac rhabdomyoma (n = 1). All patients underwent radiofrequency catheter ablation of ventricular arrhythmia with acute procedural success. LGE was identified at the reported ablation site in 9/10 patients, all arrhythmia-free at median 7 months follow-up. LGE was not visible in 1 patient who had recurrence of frequent premature ventricular contractions within 2 hours, confirmed on Holter at 1 and 21 months post-procedure. Conclusions Ventricular ablation lesion visibility by MRI in the acute post-procedure setting is feasible. Lesions identifiable with MRI may correlate with clinical outcomes. Acute MRI identification of gaps or inadequate lesions may provide the unique temporal opportunity for additional ablation therapy to decrease arrhythmia recurrence.

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