The present invention relates to a kind of monitoring systems( 10 )Monitor hemodynamic status( 100 )Object( 12 )Including imaging unit,For obtaining the image of multiple objects( 100 ),Over time,Sensor unit,For obtaining sensor signal( 14 )Main body( 100 )With main body( 100 )Vital sign,PPG units( 16 )For generating photoplethysmography,PPG signals,From described multiple images,And assessment unit( 18 )Usually assess the sensor signal,And the wherein PPG signals,To extract one or more pulse arrival times,PAT,It measures with hemodynamic data and extracts about hemodynamic status main body( 10 )0 from the measure of one or more of PAT.