Cardiac Output Monitoring by Impedance Cardiography During Treadmill Exercise

Zhang, Yujian; Qu, Minghai; Webster, John G.; Tompkins, W.J.; Ward, B. Ann; Bassett, David R.

doi:10.1109/tbme.1986.325870

Cited by 61 publications

(21 citation statements)

References 9 publications

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“…During strenuous exercise, however, motion and respiratory artefacts can become a large technological impediment. With recently developed computer averaging techniques random artefacts are removed and the signal-to-noise ratio is increased [21][22][23]. Further improvement is obtained by replacing band electrodes by spot electrodes [11,23].…”

Section: Methodsmentioning

confidence: 99%

The haemodynamic response to exercise in chronic obstructive pulmonary disease: assessment by impedance cardiography

Bogaard¹,

Dekker²,

Arntzen³

et al. 1998

Eur Respir J

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This study aimed to determine the differences in haemodynamic responses to a standard incremental exercise test between outpatients with chronic obstructive pulmonary disease (COPD) and age-matched controls and to discover the relationship between severity of airflow obstruction and exercise haemodynamics in COPD. Twenty-two male patients with COPD (forced expiratory volume in one second (FEV1)/vital capacity (VC))<80% predicted) and 20 age-matched male controls performed an incremental exercise test (10 W x min(-1)) with ventilatory function and changes in stroke volume (deltaSV) and cardiac output (deltaCO) measured by means of electrical impedance cardiography (EIC). Submaximal deltaSV and deltaCO were lower in COPD patients. Peak exercise deltaSV were equal in patients and controls (128+/-33 versus 129+/-29%, p=0.98), whereas peak deltaCO was lower in patients (COPD versus controls: 232+/-71 versus 289+/-54%, p<0.005). In COPD patients, FEV1 (% pred) was significantly correlated to deltaSV at all submaximal exercise intensities, to peak exercise deltaSV and to peak exercise deltaCO. FEV1/VC (% pred) was significantly correlated to deltaSV at 30 and 60 W. In conclusion, in chronic obstructive pulmonary disease an aberrant haemodynamic response to exercise was found, especially in patients with severe airflow obstruction. This aberrant response is related to the degree of airflow obstruction and may limit exercise performance in patients with severe chronic obstructive pulmonary disease.

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Section: Methodsmentioning

confidence: 99%

The haemodynamic response to exercise in chronic obstructive pulmonary disease: assessment by impedance cardiography

Bogaard¹,

Dekker²,

Arntzen³

et al. 1998

Eur Respir J

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show abstract

“…IC-derived estimates of cardiac output (CO) have been validated via comparison with thermodilution-derived measures with participants ranging from infants to adults with cardiovascular disease (CVD) [2,[4][5][6], with correlations ranging from 0.82 to 0.92 when IC is compared to other methods [7]. Systolic time intervals, pre-ejection period (PEP) and left ventricular ejection time (LVET) IC-derived measures, have been validated via comparisons with pulsed Doppler [8].…”

Section: Introductionmentioning

confidence: 99%

“…Early portable AI cardiographs were limited to use during dynamic exercise [4,5,10,11]. Technological advances have opened the possibility of 24-h monitoring in the natural setting outside the laboratory.…”

Section: Introductionmentioning

confidence: 99%

Temporal stability of twenty-four-hour ambulatory hemodynamic bioimpedance measures in African American adolescents

Barnes

Johnson

Treiber

2004

Blood Pressure Monitoring

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“…Averaging techniques have been commonly used to overcome these problems of signal process- ing (18,22). However, inherent in the use of averaging is the expense of information about beat-to-beat variability and transient responses.…”

Section: Theory and Methodsmentioning

confidence: 99%

New signal processing techniques for improved precision of noninvasive impedance cardiography

et al. 1989

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Cardiac Output Monitoring by Impedance Cardiography During Treadmill Exercise

Cited by 61 publications

References 9 publications

The haemodynamic response to exercise in chronic obstructive pulmonary disease: assessment by impedance cardiography

The haemodynamic response to exercise in chronic obstructive pulmonary disease: assessment by impedance cardiography

Temporal stability of twenty-four-hour ambulatory hemodynamic bioimpedance measures in African American adolescents

New signal processing techniques for improved precision of noninvasive impedance cardiography

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