Is the normal heart rate “chaotic” due to respiration? Niels Wessel, 1,a Maik Riedl, 2 and Jürgen Kurths 1,3 1 Department of Physics, Humboldt-Universität zu Berlin, 12489 Berlin, Germany 2 Interdisciplinary Center for Dynamics of Complex Systems, University of Potsdam, 14476 Potsdam, ...
N. Wessel, M. Riedl & J. Kurths, Is the normal heart rate "chaotic" due to respiration, Chaos, 19, 028508, 2009.Wessel N, Riedl M, Kurths J. Is the normal heart rate "chaotic" due to respiration? Chaos 2009;19:028508.Wessel, N.; Riedl, M.; Kurths, J. Is the normal heart ...
Modern medicine emphasizes the concept of homeostasis, constancy of the intern milieu. Accordingly, it is assumed that biological functions and processes are relatively stable during the 24 h and other time periods and that the exacerbation of disease an
Vascular changes in forearm and calf during sleep in man.Cardiovasc Res 1988;22: 666–673. PubMed Google Scholar Snyder F, Hobson JA, Morrison DF, Goldfrank F. Changes in respiration, heart rate and systolic pressure in human sleep.J Appl Physiol 1964;19: 417. PubMed Google Scholar ...
Whole-body substrate oxidation during fasting, during the glucose challenge and during insulin stimulation (EHC) was similar in both groups (Extended Data Fig.5a,b). Also, mitochondrial proteins, respiration and proteins related to lipid transport and handling were similar between groups (Fig.2h, ...
Respiration rate and membrane potential were measured simultaneously, the latter being detected using a triphenylmethylphosphonium (TPMP+)-sensitive electrode. To this end, 0.5 mg mitochondrial proteins were incubated in 1 ml standard incubation medium supplemented with 5 μM rotenone, 1 μg/ml ...
was considered to have occurred if, after a period of regular The percentage of time in each sleep state which was spent respiration, a sudden single breath of increased magnitude was breathing periodically increased between the first study and the noted (Fig. 1). Two or three successive large...
Helen B. Taussig Heart Center, Johns Hopkins Hospital, Baltimore, MD 21218, USA 5 Adult and Pediatric Cardiac Surgery, Department of Advanced Biomedical Sciences, University of Naples “Federico II”, 80138 Naples, Italy * Author to whom correspondence should be addressed. ...
Subsequently, the phase of the resulting signals XD1(ti) and XD2(ti) at every time point ti and the difference between these two given phase vectors for the interpolated bivariate data series, e.g., between heart rate and respiration, was calculated. The time series are defined as ...
N-acetyl cysteine (NAC) is a versatile drug used in various conditions, but the limitations and toxicities are not clear. The acute toxicity and toxicological mechanisms of an intraperitoneal injection of NAC in normal mice were deciphered. The LD50 for