The Combyn™ ECG: Adding haemodynamic and fluid leads for the ECG. Part II: Prediction of total body water (TBW), extracellular fluid (ECF), ECF overload, fat mass (FM) and 'dry' appendicular muscle mass (AppMM)
| Autor: | Anna-Katharina Hanserl, Albrecht Leis, Herbert Loibner, Georg P. Pichler, Mathias Penatzer, Falko Skrabal, Johannes Steinbichl |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Adult Male medicine.medical_specialty Adolescent Body water Biomedical Engineering Biophysics Hemodynamics 030204 cardiovascular system & hematology 03 medical and health sciences Electrocardiography Young Adult 0302 clinical medicine Body Water Internal medicine Extracellular fluid medicine Electric Impedance Humans Dual-energy X-ray absorptiometry Aged Aged 80 and over Heart Failure medicine.diagnostic_test business.industry Muscles Extracellular Fluid Signal Processing Computer-Assisted Organ Size Middle Aged medicine.disease 030104 developmental biology Endocrinology Heart failure Sarcopenia Case-Control Studies Lean body mass Cardiology Body Composition Female business Body mass index |
| Zdroj: | Medical engineeringphysics. 44 |
| ISSN: | 1873-4030 |
| Popis: | Simultaneous with a 12 channel ECG, body composition was analysed by segmental multi-frequency impedance analysis in 101 healthy subjects and in 118 patients with chronic heart failure (CHF, n= 40), chronic renal failure with haemodialysis (HD, n= 20), and miscellaneous internal diseases (n= 58). Whole body DXA and sodium bromide dilution were used as reference methods for total body water (TBW), extracellular fluid (ECF), appendicular muscle mass (AppMM) and fat mass (FM). Empirical prediction equations were developed in a randomized evaluation sample and then evaluated in unknowns. TBW, ECF, AppMM and FM could be predicted with regression coefficients of 0.96, 0.90, 0.95 and 0.93, respectively, all with p 0.001. Only segmental impedances and height, but not age, sex, weight and BMI contributed to the prediction of water compartments. About half the patients with CHF and half of those on HD showed increased ECF/ICF ratio in relation to % FM at the legs but not at the thorax. The predicted AppMM was additionally corrected for increased ECF to determine "dry AppMM", which is markedly lower than the misleading reference DXA. This methodology shows promise as a combination of routine ECG with measurement of body composition, assessment of sarcopenia and detection of overhydration. |
| Databáze: | OpenAIRE |
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