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Importance of features for wearable system from magnitude of ridge regression weights ranked in order from top to bottom and color‐coded by wearable sensing modality, ECG and seismocardiogram (SCG) signals. AC indicates aortic valve closure; CMR, cardiovascular magnetic resonance imaging; HR, heart rate; PEP, pre‐ejection period; RMS, root‐mean‐square; and VET, ventricular ejection time.
