Depression is a mental illness that may be harmful to an individual's health. The detection of health disorders in the early stages and precise diagnosis are critical avoid social, physiological, or psychological side effects. This work analyzes physiological signals observe if different depressive states have noticeable impact on blood volume pulse (BVP) heart rate variability (HRV) response. ...

There is a growing interest in photoplethysmography (PPG) for the continuous monitoring of cardio-respiratory signals by portable instrumentation aimed at early diagnosis cardiovascular diseases. In this context, it conceivable that PPG sensors working different wavelengths simultaneously can optimize identification apneas and quantification associated heart-rate changes or other parameters dep...

The estimation of heart rate (HR) based on wearable devices is of interest in fitness. Photoplethysmography (PPG) is a promising approach to estimate HR due to low cost; however, it is easily corrupted by motion artifacts (MA). In this work, a robust approach based on random forest is proposed for accurately estimating HR from the photoplethysmography signal contaminated by intense motion artif...

BACKGROUND A noninvasive system for determining left ventricular (LV) filling pressure may help to improve personalized fluid removal goals in hemodialysis patients. We previously showed that the change in photoplethysmography (PPG) pulse amplitude measured by finger PPG during a Valsalva maneuver correlates with invasively measured left ventricular end-diastolic pressure (LVEDP). This key PPG ...

The digital volume pulse can be recorded simply and noninvasively by photoplethysmography. The objective of the present study was to determine whether a generalized transfer function can be used to relate the digital volume pulse to the peripheral pressure pulse and, hence, to determine whether both volume and pressure pulse waveforms are influenced by the same mechanism. The digital volume pul...

Blood flow is the volume of blood that passes through a particular point in the circulatory system. Measuring the blood flow is of prime importance because it not just plays a very crucial role in understanding the functionality of heart but also other organs. It is a reflection of the cardiac activity and greatly helps in monitoring the same. The proposed methodology of blood flow measurement ...

Men's sexual arousal patterns are category-specific: Men typically display significantly greater physiological responses to sexual stimuli depicting members of their preferred gender category. Category-specific patterns of sexual arousal have not been consistently reported in natal women. We used vaginal photoplethysmography to examine patterns of sexual arousal in 11 male-to-female (MtF) trans...

BACKGROUND/PURPOSE This study has evaluated a multi-parametric system combining laser Doppler flowmetry and photoplethysmography in a single probe for the simultaneous measurement of blood flow at different depths in the tissue. This system will be used to facilitate the understanding of pressure ulcer formation and in the evaluation of pressure ulcer mattresses. METHODS The blood flow in the...