Key result
Proposed signal processing algorithm achieves ~52% true positive heartbeat detection from respiratory signals.
Why the study?
The study aimed to develop methods for deriving respiration from a single-lead ECG and extracting heartbeats from a respiratory stretch sensor to improve cardiovascular and respiratory monitoring.
A proposed method for deriving respiratory data from ECG and cardiac data from respiratory sensors may facilitate simultaneous monitoring using simple wearable devices.
Insufficient accuracy limits clinical use; leaves open refinement of respiration-derived cardiac monitoring.
This study proposes a novel method for obtaining the electrocardiogram (ECG) derived respiration (EDR) from a single lead ECG and respiration-derived cardiogram (RDC) from a respiratory stretch sensor. The research aims to reconstruct the respiration waveform, determine the respiration rate from ECG QRS heartbeat complexes data, locate heartbeats, and calculate a heart rate (HR) using the respiration signal. The accuracy of both methods will be evaluated by comparing located QRS complexes and inspiration maxima to reference positions. The findings of this study will ultimately contribute to the development of new, more accurate, and efficient methods for identifying heartbeats in respiratory signals, leading to better diagnosis and management of cardiovascular diseases, particularly during sleep where respiration monitoring is paramount to detect apnoea and other respiratory dysfunctions linked to a decreased life quality and known cause of cardiovascular diseases. Additionally, this work could potentially assist in determining the feasibility of using simple, no-contact wearable devices for obtaining simultaneous cardiology and respiratory data from a single device.
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Brandwood et al. (2023) studied Healthy (n=40). Signal processing algorithm for EDR and RDC extraction vs. Reference annotations was evaluated on True positive heartbeat detection rate. The proposed signal processing algorithm achieved an average true positive heartbeat detection rate of 52.35% from respiratory signals and located 80% of respiration peaks within half a heartbeat of reference maxima.
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