List six important pieces of information that may be obtained from an arterial pressure waveform.
They only wanted six things. However...
McGhee and Bridges Monitoring Arterial Blood Pressure: What You May Not Know (Crit Care Nurse April 1, 2002 vol. 22 no. 2 60-79 )
Thomas, Gary, and Victoria Duffin-Jones. "Monitoring arterial blood pressure." Anaesthesia & Intensive Care Medicine 16.3 (2015): 124-127.