Figure 3From: Cardiac reflections and natural vibrations: Force-frequency relation recording system in the stress echo labLeft panel: the force-frequency relation builder device. Right panel: force-frequency recording during bycicle semi-supine stress echo. The transcutaneous force sensor was housed in a small case which is positioned in the mid-sternal precordial region and is fastened by a solid gel ECG electrode. The acceleration signal is converted to digital and recorded by a laptop PC, together with an ECG signal. The system is also provided with a user interface that shows both the acceleration and the ECG signals while the acquisition is in progress. The system is portable, and the remote transmission is feasible and simple.Back to article page