PMC6604464_01
Electrocardiographies (ECGs) of patients. (a) Ventricular tachycardia (VT) ECG in emergency department; the capture beat, which is a diagnostic ECG finding for VT, is indicated by the arrow. (b) Another VT ECG in cardiac intensive care unit, another diagnostic ECG finding for VT, and the fusion beat is shown with an arrow. (c) Sinus rhythm ECG after cardioversion (ventricular premature beats (R on T) and long QT/QTc). (d) QT-QTc intervals were corrected and ventricular premature beats disappeared with maximum tolerable doses of beta-blocker therapy.
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fig1
His electrocardiography (ECG) showed VT (Figure 1(a)); thus, the patient was taken to the cardiac intensive care unit (CICU). The VT continued when the patient was admitted to the CICU (Figure 1(b)). The ECG was in the sinus rhythm and had ventricular premature beats (R on T) and QT-QTc interval prolongations (Figure 1(c)). On the 13th day of treatment, QT-QTc intervals were corrected and ventricular premature beats disappeared with maximum tolerable doses of beta-blocker therapy (Figure 1(d)).
Cardiac magnetic resonance imaging (MRI) finding: T2* mapping MRI sagittal midventricular view shows a dark appearance of left ventricle myocardium due to severe iron load (T2* value was 8.67 ms).
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MRI (Figure 2). MRI results were interpreted as deposition of intense iron in the LV myocardium (Figure 2).