Figure 1
From: State diagrams of the heart – a new approach to describing cardiac mechanics
Definition of cardiac phases. Typical tissue Doppler imaging echocardiography-derived velocity profiles. a) Definition of cardiac phases in a velocity curve containing typical biphasic pattern with a negative and a positive velocity spike during Pre-Ejection and Post-Ejection. b and c) Definition of cardiac phases in a velocity curve containing only one zero-crossing during Pre-Ejection and Post-Ejection.