Determination Of Cardiac Vector Magnitude And Angle In The 4 Quadrant Graph Using Cardiac Vector Theory. African Journal of Biomedical Research, [S. l.], v. 27, n. 4S, p. 6320–6328, 2024. DOI: 10.53555/AJBR.v27i4S.4776. Disponível em: https://africanjournalofbiomedicalresearch.com/index.php/AJBR/article/view/4776.. Acesso em: 25 oct. 2025.