Dar, Javaid Ahmad, et al. “Atrial Arrhythmias Arising from the Superior Vena Cava Presenting As Paroxysmal Atrial Fibrillation and Atrial Tachycardia”. SA Heart Journal, vol. 21, no. 1, Apr. 2024, pp. 58-65, doi:10.24170/21-1-6332.