Abstract
BackgroundAtrial fibrillation (AF) usually originates from pulmonary veins (PVs) but can also be caused by pulmonary veins outside, such as the coronary sinus (CS), the superior vena cava (SVC), and the ligament of Marshall.Case presentationA 69-year-old male with a history of palpitations for 10 years was referred to our institute because of its recurrence for half a day. A dynamic electrocardiogram revealed sinus rhythm (SR) and paroxysmal AF. Echocardiography demonstrated normal cardiac structure, and physical examination results were unremarkable. However, computed tomography angiography (CTA) showed a persistent left superior vena cava (LSVC) but no indication of thrombosis in the left atria. A cryoablation catheter was inserted into the PV. After the PV was successfully isolated, AF was still observed. After cardioversion was synchronized, SR was detected, but AF occurred again in less than a minute. Finally, we observed ectopic atrial electrical activity originating from the LSVC and successfully ablated it.ConclusionsAn LSVC may be a substrate for initiating or perpetuating atrial arrhythmia. Cryoballoon ablation can help treat AF originating from the LSVC.
Highlights
Atrial fibrillation (AF) usually originates from pulmonary veins (PVs) but can be caused by pulmonary veins outside, such as the coronary sinus (CS), the superior vena cava (SVC), and the ligament of Marshall.Case presentation: A 69-year-old male with a history of palpitations for 10 years was referred to our institute because of its recurrence for half a day
Cryoballoon ablation can help treat AF originating from the left superior vena cava (LSVC)
This article reports a case of successful cryoballoon ablation for AF in a persistent left superior vena cava (LSVC)
Summary
Atrial fibrillation (AF) usually originates from pulmonary veins (PVs) but can be caused by pulmonary veins outside, such as the coronary sinus (CS), the superior vena cava (SVC), and the ligament of Marshall. This article reports a case of successful cryoballoon ablation for AF in a persistent left superior vena cava (LSVC). Case presentation A 69-year-old male with a history of palpitations for 10 years was referred to our institute because of its recurrence for half a day. Dynamic electrocardiogram revealed SR and paroxysmal AF. Echocardiography demonstrated normal cardiac structure, and physical examination results were unremarkable. CTA showed a persistent LSVC but no indication of
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