Fig. 1From: Distinct polysomnographic and ECG-spectrographic phenotypes embedded within obstructive sleep apneaAlgorithm outline for the ECG-cardiopulmonary coupling analysis. The schema describes the analytic pathway for cardiopulmonary coupling analysis, using two distinct data streams embedded within the ECG: autonomic drive via heart rate variability and respiratory ECG-R amplitude modulation as a surrogate of respirationBack to article page