@article{barros_ribeiro_machado_rocha_2003,  title={Doppler tissue imaging to assess systolic function in Chagas' disease},  volume={80},  ISSN={0066-782X},  url={https://doi.org/10.1590/S0066-782X2003000100004},  DOI={10.1590/S0066-782X2003000100004},  number={1},  journal={Arquivos Brasileiros de Cardiologia},  publisher={Sociedade Brasileira de Cardiologia - SBC},  author={Barros, Márcio Vinícius Lins and Ribeiro, Antonio Luiz Pinho and Machado, Fernando Santana and Rocha, Manoel Otávio da Costa},  year={2003},  month={Jan},  pages={36–40} }