Figure 5 | Scientific Reports

Figure 5

From: Dynamic gravity compensation does not increase detection of myocardial ischemia in combined accelerometer and gyro sensor measurements

Figure 5

Frequency analysis of measured heart motion. (a) Measured acceleration in the circumferential direction over three consecutive heart cycles. This acceleration includes a gravity component that varies over the cycle with the rotation of the heart. Also shown is the gravity component, estimated using the gyro. (b) Power spectral density (PSD) of the signals showing that the low frequency information due to rotation is maintained in the static gravity compensated (STAc) acceleration while it is removed from the dynamic gravity compensated (DYNc) acceleration. Red circles represent the frequency containing the highest power. (c) Boxplot showing the frequency containing the highest power within the signals, separated by intervention.

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