Beyond its use in a clinical environment, photoplethysmogram (PPG) is increasingly used for measuring the physiological state of an individual in daily life. This review aims to examine existing research on photoplethysmogram concerning its ...

Photoplethysmographic (PPG) technology is a morden photoelectronic method to monitor pulse wave. Nowadays, PPG pulse detection has been widely used with the merit of accurate and convenience, in comparison with traditional palpation and other measurement instruments. It has been widely accepted that many human physiological information including heart rate, respiration rate, blood pressure ...

Crest time is the time from the foot of the PPG waveform to its peak; see Fig. (14b). Alty et al [63] proved that the crest time is a useful feature for cardiovascular disease classification.

2022年3月1日 · The first derivative waveform of PPG can be used to extract crest time, the time taken to contract from the pulse onset of the original signal to the systolic peak, or time interval ΔT from the systolic peak to the diastolic peak.

Crest time (CT) is the time from the foot of the PPG wave to the systolic peak [20]–[22]. Alty et al proved the CT can be an useful variable for cardiovascular disease classification[20].

2022年1月1日 · Analysis of the PPG contour dates back to the 1940s, when Dillon and Hertzman (1941) quantified it by crest time and dicrotic notch height, and found differences in these variables between healthy subjects and those with arteriosclerosis, and hypertension.

2015年8月29日 · The systolic PPG amplitude, the reflection index, crest time, pulse width at half height, and delta T were calculated from 20 s IR PPG signals from three positions of the right hand with respect to heart level (−50, 0, +50 cm) in 19 volunteers. PPG features were found to change with hand elevation.

6 天之前 · An automated, proprietary software evaluated PPG and PRV parameter values, which were compared with chronological age (Pearson correlation and non-linear analysis). PPG parameters describing various time-dependent aspects of cardiac ejection positively correlated with age, while those indicating arterial elasticity showed negative correlation.

5 天之前 · GAM 分析进一步揭示了参数与年龄的非线性关系。 大多数 PPG 参数与年龄呈现线性或近似线性关系，但一些参数如所有评分参数在 40 岁后呈现明显的非线性下降趋势，eLVET1 和 c - d incidence 参数呈现先上升后平稳的趋势，Crest Time 则表现出极端的非线性，有多个拐点。

2022年8月15日 · A majority of clinically reliable Photoplethysmogram (PPG) signal features necessitate exact location of PPG onset and systolic peaks. So far, state-o…