Lothman KA, Mangel AW. Pulse Synchronized Contractions (PSCs) - Editorial. J Cardiol Cardiovasc Med. 2019 Nov 15;4:199-200. doi: 10.29328/journal.jccm.1001067
Caso P, Sutherland GR, Fleming A, McDicken WN. Doppler tissue imaging: current status and future prospects. G Ital Cardiol. 1995 May 1;25(5):639-47.