Application of an accelerometer in adjusting parameters and detecting characteristics in the pacemaker rate response

Hanying Qiu; Shizhe Huang; Linjie Su; Haojia Chen; Yaowen Chen

doi:10.1088/1361-6579/ac5467

Application of an accelerometer in adjusting parameters and detecting characteristics in the pacemaker rate response

Physiol Meas. 2022 Apr 4;43(3). doi: 10.1088/1361-6579/ac5467.

Authors

Hanying Qiu¹, Shizhe Huang², Linjie Su¹, Haojia Chen¹, Yaowen Chen²

Affiliations

¹ Department of Cardiology, The First Affiliated Hospital of Shantou University Medical College, No. 57 Chang Ping Road, 515041 Shantou City, Guangdong Province, People's Republic of China.
² Department of Electronic and Information Engineering, Shantou University College of Engineering, No. 243 Da Xue Road, 515063 Shantou City, Guangdong Province, People's Republic of China.

PMID: 35383574
DOI: 10.1088/1361-6579/ac5467

Abstract

Objective.To study the application of an accelerometer in adjusting the parameters, setting the sensor indicated rate (SIR) and detecting characteristics in the pacemaker (PM) rate response.Approach.Three-axis (GT9X Link-type) accelerometers were positioned on the waist and chest in 33 participants implanted with rate responsive PMs while wearing an ambulatory ECG recorder (Holter). During the walking test, by collecting vertical axis (Axis-1) activity intensity counts, Axis-1' metabolic equivalent of energy (MET_axis-1) and its expected heart rate (HR_met-axis1) were calculated by the relevant equations, and on the basis of the HR_met-axis1as the target heart rate, the SIR was set by programming the rate response slope parameter. During the following daily walking activity, the physical activity parameters and Holter ECG was recorded continuously. After the end of the whole test the analysis on these data recorded was performed retrospectively.Main results.After completing the SIR setting, in 24 participants with complete ventricular pacing the comparison between HR_met-axis1(92.5 ± 7.8 BPM) and the HR_vp-Holter(94.0 ± 10.5 BPM) showed no statistical difference (ΔHR: 1.25 ± 6.69 BPM,P: 0.568) during the last one walking test, and there was also no significant difference (ΔHR: 2.8 ± 7.1 BPM,P: 0.398) between the HR_met-axis1(90.7 ± 7.1 BPM) and HR_vp-Holter(93.4 ± 10.3 BPM) during daily walking activity. In addition, in the data of 108 time intervals selected during the daily walking activities in the abovementioned 24 participants, MET_axis-1and HR_vp-Holtercorrelation analysis showed good correlation and the regression equation was HR = 12.4 × MET±43.1 (P<0.0001).Significance.An accelerometer can play an important role in adjusting parameters, setting the SIR and detecting characteristics in the PM rate response.

Keywords: Holter; accelerometer; physical activity; rate response pacing.

MeSH terms

Accelerometry
Electrocardiography, Ambulatory
Exercise Test
Heart Rate / physiology
Humans
Pacemaker, Artificial*
Retrospective Studies