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A giant heart tumour diagnosed accidentally in a 6-year-old boy with wide QRS complex tachycardia

Andrzej Szydłowski1, Jacek Kusa2, Katarzyna Gruszczyńska3, Agnieszka Skierska1, Ewa Moric-Janiszewska4, Zbigniew Olczak5, Anna Szydłowska1

Affiliation and address for correspondence
Pediatr Med Rodz 2022, 18 (3), p. 270–273
DOI: 10.15557/PiMR.2022.0040
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Abstract

The paper presents a case report of a 6-year-old boy with broad QRS tachycardia, who was accidentally diagnosed with a cardiac tumour. The tachycardia occurred twice, 10 months apart, and was quickly interrupted in a night medical care unit by performing a carotid sinus massage. Electrocardiography was performed, but its low quality did not allow for a detailed analysis, except for the heart rate, which was 180 bpm. Cardiological diagnosis was performed in a reference centre. No laboratory abnormalities were found. Holter ECG recorded only 374 single ventricular beats, while a routine echo revealed a very large 4.2 × 3.1 cm tumour in the interventricular septum, which did not impede intracardiac blood flow. The presence of the tumour was confirmed by magnetic resonance imaging of the heart, in which a fibroma was suspected. A beta-blocker (metoprolol) was included in the treatment and further cardiac monitoring was recommended. The boy was discharged home with a recommended follow-up in 2 months. He did not report for the appointment, while his parents requested for full imaging documentation.

Keywords
tachycardia, heart tumour, echocardiography, magnetic resonance imaging

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