Possible Clues:

• Blood pressure when the heart is contracting
• Concerning muscle contractions, getting treated is costly
• Higher pressure number is costly to adjust
• Having a rhythmically recurrent contraction
• Relating to the heart's contracting phase
• Rate read by a sphygmomanometer
• Force is costly when on the beat
• Re heart contractions
• To do with rhythmic contraction of heart chambers
• Relating to heartbeat rates