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Fig. 1 | BioMedical Engineering OnLine

Fig. 1

From: Increased cardiorespiratory synchronization evoked by a breath controller based on heartbeat detection

Fig. 1

The relationship between ECG and respiration signals of a subject using the 2/2 and 4/4 breathing patterns. Above is the ECG signal, and below is breathing signal. a ECG and respiration signals of a subject in the voluntary cardiorespiratory synchronization 2/2 mode, during which the subject inspired for two heartbeats and expired for two heartbeats in one respiration cycle. b ECG and respiration signals of a subject in the voluntary cardiorespiratory synchronization 4/4 mode, during which the subject inspired for four heartbeats and expired for four heartbeats. The top trace shows the ECG; the bottom trace shows respiration measured by a respiration belt

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