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Table 4 FORCE measurement for Force-Frequency Relation building

From: Cardiac reflections and natural vibrations: Force-frequency relation recording system in the stress echo lab

  Ultrasound Sound
Diagnostic vibrations artificial spontaneous
Imaging yes no
Wiggers cycle ejection phase isovolumic contraction
LV volumes needed yes no
Systolic pressure needed yes no
Hardware needed 2-D echo accelerometer
Force display off-line on-line
Portability difficult simple
Remote transmission difficult simple
  1. To build the FFR the memorized parameters are the heart rate, the ventricular contractile force, and the curve of force variation as a function of heart rate. The force data can be derived with ultrasound or sound methods.