PMC9995902_01
Electrocardiogram at onset. Atrial fibrillation with a rapid ventricular response. Incomplete right bundle branch block secondary to fast heart rate.
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F1
On electrocardiogram (ECG), AF was diagnosed, with a rapid ventricular response and incomplete right bundle branch block secondary to the fast heart rate (Figure 1).
Cardiac MRI. SSFP four-chambers view showing the extensive tumoral process in the left pulmonary area coming into close contact with the left atrium, with paraneoplastic pleural and pericardial effusions (A); and likely tumoral invasion of the left atrial wall on the late-gadolinium-enhanced acquisition (B). MRI, magnetic resonance imaging; SSFP, steady-state free precession.
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F2
Etiological investigation was completed by performing cardiac MRI, which showed tumoral invasion into the pericardium and the lateral wall of the left atrium (Figure 2).