A plot of a system's<unk>  versus<unk>  has long been used to measure the work done by the system and its efficiency. This analysis can be applied to heat engines and pumps, including the heart.
Real time left ventricular (LV)<unk><unk>  loops provide a framework for understanding cardiac mechanics; in fact, a considerable amount of information on cardiac performance can be determined from the<unk>  versus<unk>  plot (also known as<unk> .
Several physiologically relevant hemodynamic parameters such as stroke<unk> , cardiac output, ejection fraction, myocardial contractility can be determined from these loops.
To generate a<unk><unk>  loop for the left ventricle, the left ventricular<unk>  is plotted against left ventricular<unk>  at multiple time points during a single cardiac cycle.
Pressure volume diagram
Needle gauge comparison chart
French catheter scale
Resistive index
ABCD rating
Peak flow meter
SOFA score
Electromagnetic spectrum