Results 91 to 100 of about 10,231 (125)

Quantifying drugs influence on cardio-respiratory synchronism

Research in Experimental Medicine, 1977
The paper concerns the situation in which, for a considerable time, the onset of each respiratory cycle coincides with one and the same section of a cardiac cycle. A standardized procedure is described with which, in anesthetized rabbits, the potentiality of the biological mechanisms responsible for the phenomenon may be quantified.
K Bucher
exaly   +4 more sources

Cardio-respiratory synchronisms: Synchrony with artificial circulation

Research in Experimental Medicine, 1977
Rabbits with an artificial cerebral circulation can synchronize their respiratory rhythm with the pump stroke. There is evidence that the responsible kypernetic system is of a very elementary nature. The efficacy of the system is considerable and the experimental set-up as a whole offers itself as a model to search for drugs to increase the ...
K Bucher
exaly   +6 more sources

Voluntary cardio-respiratory synchronization

IEEE Engineering in Medicine and Biology Magazine, 2004
During stereovectorelectrocardiographic (SVEC) measurements, respiration influences the cardiac vector. This cardiac vector is modulated by the change in the heart position due to diaphragm movement, changes in conductivity in thoracic tissues caused by lung inflation, and shifts in the blood volume.
R.B. Patterson, A. Belalcazar, null Yachuan Pu   +2 more
openaire   +1 more source

Regulatory-Adaptive Capabilities of the Organism after Radical Prostatectomy with Prostate Cancer of the I-II Degree

, 2020
Purpose: to reveal the dynamics of regulatory and adaptive status in men after laparoscopic radical prostatectomy with a nerve-sparing result and when nerve-sparing did not result Material and methods. Observations have been performed on 50 patients with
A. G. Penzhoyan, G. A. Penzhoyan, V. M. Pokrovsky, V. Abushkevich   +3 more
semanticscholar   +1 more source

Cardio-Respiratory Synchronization with Matched Signal Registration

2019 8th Mediterranean Conference on Embedded Computing (MECO), 2019
The problem of joint heart rate and respiration signal analysis is considered in this paper. The analysis requires the sequences of heart rate and respiratory data to be synchronized. It is offered to synchronize the sequences at the stage of their registration. The respiration signal is sampled at the time points coordinated with the heart beats.
Tatyana Vityazeva, Sergey Vityazev, Anatoly A. Mikheev   +2 more
openaire   +1 more source

Voluntary cardio-respiratory synchronization: hardware and software development and evaluation

2001 Conference Proceedings of the 23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2005
Voluntary cardio-respiratory synchronization (VCRS) is a technique where an individual's breathing is voluntarily phase locked with his/her heart beat. A signal is generated (tone or light) from the ECG that is used to pace the breath with a fixed number of heart beats for inspiration and expiration.
R.P. Patterson, H.A. Belalcazar, L.I. Mason, Y. Pu   +3 more
openaire   +1 more source

Determining the relationship of heart rate and blood pressure using voluntary cardio-respiratory synchronization (VCRS)

Physiological Measurement, 2003
Voluntary cardio-respiratory synchronization (VCRS) was used to investigate heart rate and blood pressure changes in the supine position in 21 subjects. VCRS involves a breathing pattern that is synchronized with the cardiac cycle. The signals to inhale and exhale are derived from the ECG.
Lynne I, Mason, Robert P, Patterson
openaire   +2 more sources

Quantifying cardio-respiratory phase synchronization—a comparison of five methods using ECGs of post-infarction patients

Physiological Measurement, 2017
Phase synchronization between two weakly coupled oscillators occurs in many natural systems. Since it is difficult to unambiguously detect such synchronization in experimental data, several methods have been proposed for this purpose. Five popular approaches are systematically optimized and compared here.We study and apply the automated synchrogram ...
Kuhnhold, Anja, Schumann, Aicko Y., Bartsch, Ronny P., Ubrich, Romy, Barthel, Petra, Schmidt, Georg, Kantelhardt, Jan W.   +6 more
openaire   +3 more sources

Cardio‐respiratory synchronization and myocardial function in hypoxic carp, Cyprinus carpio L.

Journal of Fish Biology, 1991
Moderate hypoxia (Pio2, = 50 mmHg) caused tachycardia in carp, Cyprinus curpio Linnaeus, whereas severe hypoxia (Pio2, from 30 to 5 mmHg) coincided with bradycardia accompanied by alterations of the waveforms of the electrocardiogram. A cardio respiratory synchronization developed during hypoxia and was maintained during bradycardia.
M. L. Glass, F. T. Rantin, R. M. M. Verzola, M. N. Fernandes, A. L. Kalinin   +4 more
openaire   +1 more source

Respiratory effects on cardiac functions measured by impedance cardiography under voluntary cardio-respiratory synchronization (VCRS)

Images of the Twenty-First Century. Proceedings of the Annual International Engineering in Medicine and Biology Society, 2003
The respiratory variations of stroke volume (SV), R-R interval and ventricle filling time were studied in supine and sitting conditions. The tests were performed under VCRS on ten male subjects. Impedance cardiography (ZCG) was used with band electrodes to measure SV. SV increased during inspiration and decreased during expiration.
L. Wang, R.P. Patterson, S.B. Raza
openaire   +1 more source