Correlation between impedance cardiography and 6 min walk distance in atrial fibrillation patients

Ding, Ling; Quan, Xiao‐Qing; Zhang, Shu; Ruan, Lei; Zhang, Le; Zheng, Kai; Yu, Wei; Wu, Xiaofen; Mi, Tao; Zhang, Cuntai; Zhou, Haiyan

doi:10.1186/s12872-016-0297-0

Cited by 5 publications

(5 citation statements)

References 36 publications

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“…Also, as mentioned above, the data of the previous studies were controversial, with some finding a strong correlation [ 22 ], while others only a modest correlation [ 13 ]. We hypothesized that the best correlation would be observed between LVEF, NT-proBNP, and the main ICG parameters, but, to our surprise, the best correlation was observed between 6MWD and ICG data, which is in agreement with research of other investigators [ 23 , 24 ].…”

Section: Discussionsupporting

confidence: 91%

Single-Center Study in Lithuania to Evaluate the Role of Transthoracic Impedance Cardiography in the Diagnosis and Outcome Evaluation of 301 Patients with Chronic Heart Failure Exacerbation

et al. 2022

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Background:Scientific data regarding transthoracic impedance cardiography (ICG) parameters and its utility in patients with heart failure (HF) remains controversial. This study from a single center in Lithuania aimed to evaluate the role of ICG in the diagnosis and outcome evaluation of patients who were admitted to the hospital due to HF exacerbation. Material/Methods:The sample consisted of 301 consecutive patients with a previous chronic HF diagnosis (166 men, 135 women) hospitalized for HF flare-ups. ICG data were compared to other noninvasive HF diagnostic tests. Data about patient outcomes were gathered from the Lithuanian Medical Record Database. Results:A weak correlation of amino-terminal pro-brain natriuretic peptide (NT-proBNP) with thoracic fluid content (TFC) and thoracic fluid content index (TFCI) was found (r=0.204, P<0.001 and r=0.207, P<0.001, respectively).There was weak to moderate correlation of 6-min walk distance with main ICG data. There was weak correlation between left ventricular ejection fraction (LVEF) with TFCI (r=-0.163, P=0.005), systolic index (r=-0.137, P=0.017), and systolic time ratio (r=0.236, P<0.001). By multivariate Cox proportional analysis, the following parameters were independently associated with cardiac death (P<0.001): NT-proBNP ³425.5 pmoL/L (hazard ratio (HR), 5.104, 95% confidence interval (CI) 3.326-7.832), TFC ³36.9 1/kOhm (HR, 4.604, 95% CI 2.701-7.849), LVEF £40% (HR, 4.942, 95% CI 2.8256-8.647). Conclusions:The combination of non-invasively measured TFC, LVEF, and NT-proBNP showed great prognostic value for predicting readmissions and cardiac death in patients with HF.

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Section: Discussionsupporting

confidence: 91%

Single-Center Study in Lithuania to Evaluate the Role of Transthoracic Impedance Cardiography in the Diagnosis and Outcome Evaluation of 301 Patients with Chronic Heart Failure Exacerbation

et al. 2022

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“…The basic principle of ICG was that specific waveform that can be used to calculate SV appeared as a result of the impedance changing with high-frequency (75 kHz) and low magnitude (1.8 mA) current across the thorax during cardiac ejection. [ 17 , 23 ] After 5 minutes’ rest, the technician put electrodes on the neck and hypochondriac regions of patients and performed ICG for 3 minutes when the subjects were in the supine position (Fig. 1 A).…”

Section: Methodsmentioning

confidence: 99%

“…[ 12 , 14 ] A considerable proportion of previous data have confirmed the role of hemodynamic parameters measured by ICG in estimating cardiac function. [ 15 – 17 ] The hemodynamic parameters CO, cardiac index (CI), stroke volume (SV), stroke volume index (SVI), left stroke work (LSW), and left stroke work index (LSWI) correlated positively with cardiac function. [ 18 ] Stroke systemic vascular resistance (SSVR) represents the resistance of blood flow in the vascular system.…”

Section: Introductionmentioning

confidence: 99%

Values of hemodynamic variation in response to passive leg raising in predicting exercise capacity of heart failure with preserved ejection fraction

Zhou

Ding²,

Mi³

et al. 2016

Medicine

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In heart failure patients with preserved ejection fraction, their hemodynamic parameters usually change when they are from recumbent to passive leg raising. The authors designed this study to investigate the relationship between hemodynamic parameters measured by impedance cardiography (ICG) and 6-minute walk distance (6MWD) of heart failure with preserved ejection fraction (HFPEF). We recruited 49 subjects with HFPEF in the study, and all the subjects were separated into 2 groups: the patients whose hemodynamic parameters rose after passive leg raising were in group 1 (n = 26) and the patients whose hemodynamic parameters did not rise after passive leg raising were in group 2 (n = 23). Our study then compared the 6MWD, left ventricular ejection fraction, and plasma NT-pro-brain natriuretic peptide between the 2 groups. Group 1 had significantly longer 6MWD than group 2 (515.38 ± 24.97 vs 306.39 ± 20.20 m; P = 0.043). Hemodynamic parameters measured by ICG significantly correlated with 6MWD in both groups. Patients whose hemodynamic parameters rose in response to passive leg raising were more likely to have better exercise capacity. Hemodynamic variation in response to passive leg raising measured by ICG may be more sensitive in predicting exercise capacity of patients with HFPEF.

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“…Several mechanisms contribute to the pathogenesis of this disease, and changes in the autonomic nervous system (ANS) have been implicated as possible triggers for the onset and maintenance of this disease, with adrenergic hyperactivity occurring in 10%–15% of patients with paroxysmal AF (Coumel, 1994 ; Rocha et al., 2021 ). Studies using invasive or noninvasive methods have demonstrated that patients with AF exhibit hemodynamic adaptations at rest compared to patients without this arrhythmia, as detected by differences in indices such as heart rate (HR), blood pressure (BP), stroke volume (SV), cardiac output (CO), and peripheral vascular resistance (PVR) (Ding et al., 2016 ). However, few studies have focused on the transition from the supine to the standing position using the tilt test in AF patients.…”

Section: Introductionmentioning

confidence: 99%

Differential hemodynamic adaptations to tilt test in patients with idiopathic atrial fibrillation

Magajevski,

Távora‐Mehta,

Mehta

et al. 2024

Physiological Reports

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The hemodynamic response during the transition from the supine to standing position in idiopathic atrial fibrillation (AF) patients is not completely understood. This study aimed to analyze the hemodynamic changes that occur during the head‐up tilt test in idiopathic AF patients. We investigated the hemodynamic changes during the head‐up tilt test with impedance cardiography in 40 AF patients (12 with AF rhythm‐AFr and 28 with sinus rhythm‐AFsr) and 38 non‐AF controls. Patients with AFr had attenuated SVI decrease after standing when compared to AFsr and non‐AF [ΔSVI in mL/m2: −1.3 (−3.4 to 1.7) vs. −6.4 (−17.3 to −0.1) vs. −11.8 (−18.7 to −8.0), respectively; p < 0.001]. PVRI decreased in AFr but increased in AFsr and non‐AF [ΔPVRI in dyne.seg.m2/cm5: −477 (−1148 to 82.5) vs. 131 (−525 to 887) vs. 357 (−29 to 681), respectively; p < 0.01]. Similarly, compared with non‐AF patients, AFr patients also had a greater HR and greater CI increase after standing. The haemodynamic response to orthostatic challenge suggests differential adaptations between patients with AF rhythm and those reverted to sinus rhythm or healthy controls. Characterizing the hemodynamic phenotype may be relevant for the individualized treatment of AF patients.

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Correlation between impedance cardiography and 6 min walk distance in atrial fibrillation patients

Cited by 5 publications

References 36 publications

Single-Center Study in Lithuania to Evaluate the Role of Transthoracic Impedance Cardiography in the Diagnosis and Outcome Evaluation of 301 Patients with Chronic Heart Failure Exacerbation

Single-Center Study in Lithuania to Evaluate the Role of Transthoracic Impedance Cardiography in the Diagnosis and Outcome Evaluation of 301 Patients with Chronic Heart Failure Exacerbation

Values of hemodynamic variation in response to passive leg raising in predicting exercise capacity of heart failure with preserved ejection fraction

Differential hemodynamic adaptations to tilt test in patients with idiopathic atrial fibrillation

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