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Gepubliceerd in: Netherlands Heart Journal 6/2017

Open Access 26-04-2017 | Heart Beat

I spy with my MRI: Cause of complete heart block in a young patient revealed

Auteurs: R. P. Amier, R. B. van Loon, L. J. Meijboom, R. Nijveldt

Gepubliceerd in: Netherlands Heart Journal | Uitgave 6/2017

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A 21-year-old female patient presented with unexplained weight gain and dyspnoea on exertion. The ECG showed third-degree atrioventricular (AV) block with a junctional escape rhythm of 45 bpm (Fig. 1). Echocardiography showed no cardiac abnormalities. However, subsequent CMR using late gadolinium enhancement (LGE) revealed a single region (32 × 15 mm) of intramyocardial, high-intense, homogeneous contrast enhancement with a well-defined border in the basal inferoseptal myocardium (Fig. 2). Additional sequences ruled out the presence of fat. The septal localisation, homogeneous high-intense contrast enhancement with smooth borders, in the absence of fat, pericardial effusion or systemic disease such as sarcoidosis, all attest to an intramyocardial fibroma as the most likely diagnosis. The fibroma is thought to impede the conductive system, in this case leading to third-degree AV block. Cardiac fibromas are benign congenital tumours with predominant localisation in the ventricular septum and left ventricular (LV) free wall, where tumour mass effect can cause arrhythmias, haemodynamic obstruction, heart failure or even sudden cardiac death. Fibromas do not regress spontaneously, therefore monitoring of growth is indicated. Treatment can include pacemaker implantation for arrhythmias and surgical excision in case of LV outflow obstruction. This case exemplifies the crucial value of tissue characterisation by LGE-CMR in identifying a cardiac fibroma causing heart block in a young patient.

Conflict of interest

R.P. Amier, R.B. van Loon, L.J. Meijboom and R. Nijveldt declare that they have no competing interests.
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://​creativecommons.​org/​licenses/​by/​4.​0/​), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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Metagegevens
Titel
I spy with my MRI: Cause of complete heart block in a young patient revealed
Auteurs
R. P. Amier
R. B. van Loon
L. J. Meijboom
R. Nijveldt
Publicatiedatum
26-04-2017
Uitgeverij
Bohn Stafleu van Loghum
Gepubliceerd in
Netherlands Heart Journal / Uitgave 6/2017
Print ISSN: 1568-5888
Elektronisch ISSN: 1876-6250
DOI
https://doi.org/10.1007/s12471-017-0997-9

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