Heart rate variability in evaluation of recovery phase of open chest surgery
Saha, Sudeb (2020)
2020
Degree Programme in Electrical Engineering, MSc (Tech)
Lääketieteen ja terveysteknologian tiedekunta - Faculty of Medicine and Health Technology
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Hyväksymispäivämäärä
2020-04-08
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tuni-202003032489
https://urn.fi/URN:NBN:fi:tuni-202003032489
Tiivistelmä
Heart rate variability(HRV) is a profound technique to assess autonomic nervous system (ANS). Therefore, HRV is widely used in different applications including recovery monitoring. Open chest surgery is relatively complex and lengthy. Open-chest surgery intrudes anat-omy and physiology of the chest and significantly reduces the functions for a few days after the operation.
In those recovery days, it is important to monitor the patient’s well beingness as well as autonomic nervous system function. HRV is a promising method for this purpose. The purpose of this study is to use HRV in evaluation of recovery phase of open chest surgery.
The study population was 136 patients with elective heart surgery, pulmonary re-sections sur-gery, and minor pleuropulmonary surgery. The measurements were conducted one day before the operation and for 1–3 days after the operation during the usual episode of treatment at the hospital. Simultaneous ECG signal was measured for 10 minutes. There were two equally sized subgroups A and B based on the type of given physiotherapy of randomized patients in these three surgery type groups.
RR intervals of each measurement were calculated and by using those RR intervals, HRV pa-rameters were found out for every measurements. Statistical tests were performed finding the significant difference between different measurement days. The significance level (p-value) was 0.05. Statistical comparisons of HRV parameters between one day before surgery and 1-3 days after surgery were performed inside all patients as well as inside different specific patient group. Statistical tests between 1 day and 2-3 days after surgery as well as between 2 and 3 day after surgery were also performed. Statistical comparisons of HRV parameters between control group A and B were also performed inside all patients and inside different specific patient group.
The results showed that there were significant differences in some HRV parameters between one day before and 1-3 days after the operation, especially, heart surgery group had strong significant differences among those days. The study finds no significant difference between intervention subgroups A and B except minor pulmonary surgery patients. The study indicates that some HRV parameters were significantly different due to open chest surgery. However, evaluating re-covery phase need longer observation period.
In those recovery days, it is important to monitor the patient’s well beingness as well as autonomic nervous system function. HRV is a promising method for this purpose. The purpose of this study is to use HRV in evaluation of recovery phase of open chest surgery.
The study population was 136 patients with elective heart surgery, pulmonary re-sections sur-gery, and minor pleuropulmonary surgery. The measurements were conducted one day before the operation and for 1–3 days after the operation during the usual episode of treatment at the hospital. Simultaneous ECG signal was measured for 10 minutes. There were two equally sized subgroups A and B based on the type of given physiotherapy of randomized patients in these three surgery type groups.
RR intervals of each measurement were calculated and by using those RR intervals, HRV pa-rameters were found out for every measurements. Statistical tests were performed finding the significant difference between different measurement days. The significance level (p-value) was 0.05. Statistical comparisons of HRV parameters between one day before surgery and 1-3 days after surgery were performed inside all patients as well as inside different specific patient group. Statistical tests between 1 day and 2-3 days after surgery as well as between 2 and 3 day after surgery were also performed. Statistical comparisons of HRV parameters between control group A and B were also performed inside all patients and inside different specific patient group.
The results showed that there were significant differences in some HRV parameters between one day before and 1-3 days after the operation, especially, heart surgery group had strong significant differences among those days. The study finds no significant difference between intervention subgroups A and B except minor pulmonary surgery patients. The study indicates that some HRV parameters were significantly different due to open chest surgery. However, evaluating re-covery phase need longer observation period.