ABC | Volume 113, Nº3, September 2019

Case Report Cilsal Single-ventricle atrioventricular connection in elderly individual Arq Bras Cardiol. 2019; 113(3):438-443 Figure 1 – Chest X-Ray of the patient. Figure 2 – Electrocardiography of the patient. (A). Sinus rhythm with QTc prolongation (B). Atrial flutter (C). Atrioventricular dissociation and ventricular extra-systole (D). Holter monitorization revealed non-sustained ventricular tachycardia. atrial flutter (Figure 2-B). Therefore, digoxin and lowmolecular weight heparin treatment were also started. In the second week, the patient developed acute renal insufficiency and the electrocardiogram showed atrioventricular dissociation and ventricular extra-systole (Figure 2-C). Immediately after the digoxin treatment had been stopped, amiodarone infusion has started. Holter monitorization revealed atrioventricular dissociation and non-sustained ventricular tachycardia (Figure 2-D). Blood level of Digoxin was within normal reference values. Serial echocardiography was performed and no difference has been observed in the cardiac parameters during the hospitalization. Despite atrioventricular dissociation, we decided to follow-up her without pacemaker implantation due to hemodynamic stability. Although secondary prevention 439