Unravelling the potential of phase portrait in the auscultation of mitral valve dysfunction M. S. Swapna, S. Sreejyothi, A. Renjini, Vimal Raj and S. Sankararaman Eur. Phys. J. Plus, 136 2 (2021) 184 Published online: 05 February 2021 DOI: 10.1140/epjp/s13360-021-01185-6