Valerio, Raul, et al. “Stiff Left Atrium Syndrome After Atrial Fibrillation Ablation – A Diagnosis Not To Forget”. JOURNAL OF CARDIAC ARRHYTHMIAS, vol. 34, no. 3, Dec. 2021, pp. 120-7, https://www.jca.org.br/jca/article/view/3457.