Heart Rate Variability of a Heart Reviving from Extracorporeal Circulation

Hsin, Ho-Tsung; Lee, Yun-Kai; Lu, Cheng-Wei; Lin, Tzu-Yu; Shieh, Jiann-Shing

doi:10.1016/j.ijge.2017.08.002

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…Such a decrease is expected of CABG surgery; a study conducted by Lakusic et al reported that HRV decreases considerably after surgery due to several factors, such as surgical manipulation of the heart and adjacent structures, anesthesia, duration of cardioplegia, and extracorporeal circulation (Lakusic, Mahovic, Sonicki, Slivnjak, & Baborski, 2013). In addition, there may be increased levels of noradrenaline during CABG surgery that may lead to a change in the iR‐R (Hsin, Lee, Lu, Lin, & Shieh, 2017).…”

Section: Discussionmentioning

confidence: 99%

Different physiotherapy protocols after coronary artery bypass graft surgery: A randomized controlled trial

Ribeiro

Poça

Rocha

et al. 2020

Physiotherapy Res Intl

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Background and purpose The aim of this study was to investigate the influence of different physiotherapy protocols on heart rate variability (HRV) and hospital length of stay in older adults undergoing coronary artery bypass graft (CABG). Methods Randomized controlled trial with allocation and researcher blinding and intention‐to‐treat analysis. Forty‐eight patients undergoing CABG were randomly assigned to a control group (CG), early mobilization group (EMG), or virtual reality group (VRG). CG performed respiratory physiotherapy and metabolic exercises, the EMG performed cycle ergometer exercises and ambulation, and the VRG performed the same activities as the EMG, with the addition of two Nintendo Wii games during 3 postoperative days. The variables of heart rate variability on preoperative and fourth postoperative day, and time of discharge of hospital was analyzed. Results The VRG presented a shorter hospital length of stay (p = 0.03). The CG showed a decline in HRV from the preoperative period to fourth postoperative day on square root of the mean of the squared differences between successive RR intervals (33.18 ± 9.89–9.74 ± 6.88, p < 0.05), standard deviation of all RR intervals (25.48 ± 7.50–15.23 ± 11.27, p < 0.05), and dispersion of points perpendicular to identity line (28.26 ± 21.6–2.73 ± 1.31, p < 0.05). The EMG and VRG presented a higher cardiac autonomic modulation compared to the CG (p < 0.05), with improved parasympathetic activity. Conclusions Different protocols of physiotherapy intervention affected autonomic modulation of the heart rate and hospital length of stay in patients undergoing CABG.

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Section: Discussionmentioning

confidence: 99%

Different physiotherapy protocols after coronary artery bypass graft surgery: A randomized controlled trial

Ribeiro

Poça

Rocha

et al. 2020

Physiotherapy Res Intl

View full text Add to dashboard Cite

show abstract

“… 38 We set the scale from 1 to 10 and determined the complexity index by integrating the area under the modMSE curve, as described in previous studies. 27 , 28 , 29 , 31 , 32 (Details of calculations are described in Data S1 , whereas we also refer the readers to the study by Wu et al 38 for detailed derivations of modMSE).…”

Section: Methodsmentioning

confidence: 99%

“…Reduced complexity of physiological signals has been associated with aging, 9 , 15 increased risk and greater frailty during cardiac surgery 21 , 22 , 25 and after extracorporeal perfusion, 26 , 27 and worse outcomes after major ischemic stroke, 28 , 29 hemorrhagic stroke, 30 , 31 and traumatic brain injury. 32 , 33 However, the physiological and clinical validity of BP complexity has not been determined, because of the lack of proper physiological definition, short recording length of measurements, and limited study sizes.…”

mentioning

confidence: 99%

Blood Pressure Complexity Discriminates Pathological Beat‐to‐Beat Variability as a Marker of Vascular Aging

Lee

Mazzucco

Rothwell

et al. 2022

JAHA

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Background Beat‐to‐beat blood pressure variability (BPV) is associated with an increased risk of stroke but can be driven by both healthy physiological processes and failure of compensatory mechanisms. Blood pressure (BP) complexity measures structured, organized variations in BP, as opposed to random fluctuations, and its reduction may therefore identify pathological beat‐to‐beat BPV. Methods and Results In the prospective, population‐based OXVASC (Oxford Vascular Study) Phenotyped Cohort with transient ischemic attack or minor stroke, patients underwent at least 5 minutes of noninvasive beat‐to‐beat monitoring of BP (Finometer) and ECG to derive the following: BPV (coefficient of variation) and complexity (modified multiscale entropy) of systolic BP and diastolic BP, heart rate variability (SD of R‐R intervals), and baroreflex sensitivity (BRS; Welch's method), in low‐ (0.04–0.15 Hz) and high‐frequency (0.15–0.4 Hz) bands. Associations between BPV or BP complexity with autonomic indexes and arterial stiffness were determined (linear regression), unadjusted, and adjusted for age, sex, and cardiovascular risk factors. In 908 consecutive, consenting patients, BP complexity was inversely correlated with BPV coefficient of variation ( P <0.001) and was similarly reduced in patients with hypertension or diabetes ( P <0.001). However, although BPV coefficient of variation had a U‐shaped relationship with age, BP complexity fell systematically across age quintiles (quintile 1: 15.1 [14.0–16.1] versus quintile 5: 13.8 [12.4–15.1]) and was correlated with markers of autonomic dysfunction (heart rate variability SD of R‐R intervals: r = 0.20; BRS low frequency: 0.19; BRS high frequency: 0.26) and arterial stiffness (pulse wave velocity: −0.21; all P <0.001), even after adjustment for clinical variables (heart rate variability SD of R‐R intervals: 0.12; BRS low frequency and BRS high frequency: 0.13 and 0.17; and pulse wave velocity: −0.07; all P <0.05). Conclusions Loss of BP complexity discriminates BPV because of pathological failure of compensatory mechanisms and may represent a less confounded and potentially modifiable risk factor for stroke.

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Heart Rate Variability of a Heart Reviving from Extracorporeal Circulation

Cited by 2 publications

References 7 publications

Different physiotherapy protocols after coronary artery bypass graft surgery: A randomized controlled trial

Different physiotherapy protocols after coronary artery bypass graft surgery: A randomized controlled trial

Blood Pressure Complexity Discriminates Pathological Beat‐to‐Beat Variability as a Marker of Vascular Aging

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