@article{favarato_benvenuti_2016,  title={Case 4 - A 67 Year-Old Man with Aortic Regurgitation Who Presented Syncope Followed by Shock},  volume={107},  ISSN={0066-782X},  url={https://doi.org/10.5935/abc.20160125},  DOI={10.5935/abc.20160125},  number={2},  journal={Arquivos Brasileiros de Cardiologia},  publisher={Sociedade Brasileira de Cardiologia - SBC},  author={Favarato, Desiderio and Benvenuti, Luiz Alberto},  year={2016},  month={Aug},  pages={176–183} }