Heart beat and cardiovascular system analysis
The monitoring of the heart beat and other parameters related to the cardiovascular system is requested in the clinical context in order to perform the diagnosis of many pathologies and dysfunctions. In the last years, different devices for testing and analyzing the operating state of the global cardiovascular system of patients have been widely developed. Some of these techniques, like cardiac catheterism, are invasive, whereas others are not. The most widespread non-invasive tests are the electrocardiogram, that records the electrical activity of the heart, and the techniques that make use of ultrasonic waves, like EcoDoppler and echocardiogram.
Recently, researchers have been developing laser-based systems for non-contact measurement of biomedical parameters, in order to exceed the limits related to particular conditions such as the impossibility to use contact sensors and electrodes. Nowadays, the most common optical technique is based on Laser Doppler Vibrometry (LDV). The main advantage of the optical vibrocardiography is that it can be applied in various medical fields where electromagnetic interferences and patient conditions represent an obstacle in the use of standard technique, like ECG.
Julight Laser Vibrometer VSM is a good candidate as a viable alternative to traditional techniques allowing to obtain, in real time and without contact, the heart rate, the artery vessel deformation and the delay in the pressure wave propagation in different body parts [1,2].
Measurements were carried out using the VSM 100 laser vibrometer.
 Bollati C., Capelli G., Giuliani G., “Laser diode vibrometry for non-contact monitoring of the heart beat”, Atti di FOTONICA 2011, pp.1-4, 9-11 Maggio, 2011.
 Bollati C., Capelli G., Giuliani G., “Non-contact monitoring of heart beat using optical laser diode vibrocardiography”, Atti dell’ International Workshop on BIOPHOTONICS 2011, pp.1-3, 8-10 Giugno 2011.