Thomas RJ, Mietus JE, Peng CK, et al. Relationship between delta power and the electrocardiogram-derived cardiopulmonary spectrogram. Possible implications for assessing the effectiveness of sleep. Sleep Med 2014; 15(1): 125-31 DOI: 10.1016/j.sleep.2013.10.002
To evaluate the hypothesis that that slow-wave EEG power would show a relatively fixed-time relationship to periods of high-frequency CardioPulmonary Coupling (Stable Sleep).
The overall correlation (r) between delta power and high-frequency coupling (HFC – stable sleep) power was statistically significant.
The results support a tight temporal relationship between EEG slow wave power and high frequency cardiopulmonary coupling and allows for a simple method to estimate and track deep sleep.