Comput Methods Programs Biomed - Multifractal characterisation of electrocardiographic RR and QT time-series before and after progressive exercise.

Tópicos

{ signal(2180) analysi(812) frequenc(800) }
{ measur(2081) correl(1212) valu(896) }
{ blood(1257) pressur(1144) flow(957) }
{ activ(1452) weight(1219) physic(1104) }
{ spatial(1525) area(1432) region(1030) }
{ use(1733) differ(960) four(931) }
{ problem(2511) optim(1539) algorithm(950) }
{ concept(1167) ontolog(924) domain(897) }
{ model(2220) cell(1177) simul(1124) }
{ visual(1396) interact(850) tool(830) }
{ featur(3375) classif(2383) classifi(1994) }
{ featur(1941) imag(1645) propos(1176) }
{ studi(1410) differ(1259) use(1210) }
{ sampl(1606) size(1419) use(1276) }
{ first(2504) two(1366) second(1323) }
{ can(981) present(881) function(850) }
{ analysi(2126) use(1163) compon(1037) }
{ estim(2440) model(1874) function(577) }
{ model(3404) distribut(989) bayesian(671) }
{ data(1737) use(1416) pattern(1282) }
{ studi(2440) review(1878) systemat(933) }
{ learn(2355) train(1041) set(1003) }
{ perform(999) metric(946) measur(919) }
{ research(1085) discuss(1038) issu(1018) }
{ import(1318) role(1303) understand(862) }
{ record(1888) medic(1808) patient(1693) }
{ age(1611) year(1155) adult(843) }
{ time(1939) patient(1703) rate(768) }
{ health(1844) social(1437) communiti(874) }
{ structur(1116) can(940) graph(676) }
{ survey(1388) particip(1329) question(1065) }
{ process(1125) use(805) approach(778) }
{ method(1969) cluster(1462) data(1082) }
{ method(2212) result(1239) propos(1039) }
{ can(774) often(719) complex(702) }
{ imag(1947) propos(1133) code(1026) }
{ inform(2794) health(2639) internet(1427) }
{ system(1976) rule(880) can(841) }
{ imag(1057) registr(996) error(939) }
{ bind(1733) structur(1185) ligand(1036) }
{ sequenc(1873) structur(1644) protein(1328) }
{ method(1219) similar(1157) match(930) }
{ imag(2830) propos(1344) filter(1198) }
{ network(2748) neural(1063) input(814) }
{ imag(2675) segment(2577) method(1081) }
{ patient(2315) diseas(1263) diabet(1191) }
{ take(945) account(800) differ(722) }
{ motion(1329) object(1292) video(1091) }
{ assess(1506) score(1403) qualiti(1306) }
{ treatment(1704) effect(941) patient(846) }
{ surgeri(1148) surgic(1085) robot(1054) }
{ framework(1458) process(801) describ(734) }
{ error(1145) method(1030) estim(1020) }
{ chang(1828) time(1643) increas(1301) }
{ clinic(1479) use(1117) guidelin(835) }
{ algorithm(1844) comput(1787) effici(935) }
{ extract(1171) text(1153) clinic(932) }
{ method(1557) propos(1049) approach(1037) }
{ data(1714) softwar(1251) tool(1186) }
{ design(1359) user(1324) use(1319) }
{ control(1307) perform(991) simul(935) }
{ care(1570) inform(1187) nurs(1089) }
{ general(901) number(790) one(736) }
{ method(984) reconstruct(947) comput(926) }
{ search(2224) databas(1162) retriev(909) }
{ case(1353) use(1143) diagnosi(1136) }
{ howev(809) still(633) remain(590) }
{ data(3963) clinic(1234) research(1004) }
{ risk(3053) factor(974) diseas(938) }
{ system(1050) medic(1026) inform(1018) }
{ model(2341) predict(2261) use(1141) }
{ compound(1573) activ(1297) structur(1058) }
{ perform(1367) use(1326) method(1137) }
{ studi(1119) effect(1106) posit(819) }
{ health(3367) inform(1360) care(1135) }
{ model(3480) simul(1196) paramet(876) }
{ monitor(1329) mobil(1314) devic(1160) }
{ ehr(2073) health(1662) electron(1139) }
{ state(1844) use(1261) util(961) }
{ research(1218) medic(880) student(794) }
{ patient(2837) hospit(1953) medic(668) }
{ model(2656) set(1616) predict(1553) }
{ data(2317) use(1299) case(1017) }
{ medic(1828) order(1363) alert(1069) }
{ cost(1906) reduc(1198) effect(832) }
{ group(2977) signific(1463) compar(1072) }
{ gene(2352) biolog(1181) express(1162) }
{ data(3008) multipl(1320) sourc(1022) }
{ intervent(3218) particip(2042) group(1664) }
{ activ(1138) subject(705) human(624) }
{ patient(1821) servic(1111) care(1106) }
{ use(2086) technolog(871) perceiv(783) }
{ high(1669) rate(1365) level(1280) }
{ cancer(2502) breast(956) screen(824) }
{ use(976) code(926) identifi(902) }
{ drug(1928) target(777) effect(648) }
{ result(1111) use(1088) new(759) }
{ implement(1333) system(1263) develop(1122) }
{ decis(3086) make(1611) patient(1517) }
{ detect(2391) sensit(1101) algorithm(908) }

Resumo

The scaling (fractal) characteristics of electrocardiograms (ECG) provide information complementary to traditional linear measurements (heart rate, repolarisation rate etc.) allowing them to discriminate signal changes induced pathologically or pharmacologically. Under such interventions scaling behaviour is described by multiple local scaling exponents and the signal is termed multifractal. Exercise testing is used extensively to quantify and monitor cardiorespiratory health, yet to our knowledge there has been no previous multifractal investigation of exercise-induced changes in heart rate dynamics. Ambulatory ECGs were acquired from eight healthy participants. Linear descriptive statistics and a parameterisation of multifractal singularity spectra were determined for inter-beat (RR) and intra-beat (QT) time-series before and after exercise. Multivariate analyses of both linear and multifractal measures discriminated between pre- and post-exercise periods and proportionally more significant correlations were observed between linear than between multifractal measures. Variance was more uniformly distributed over the first three principal components for multifractal measures and the two classes of measures were uncorrelated. Order and phase randomisation of the time-series indicated that both sample distribution and correlation properties contribute to multifractalilty. This exploratory study indicates the possibility of using physical exercise in conjunction with multifractal methodology as an adjunctive description of autonomically mediated modulation of heart rate.

Resumo Limpo

scale fractal characterist electrocardiogram ecg provid inform complementari tradit linear measur heart rate repolaris rate etc allow discrimin signal chang induc patholog pharmacolog intervent scale behaviour describ multipl local scale expon signal term multifract exercis test use extens quantifi monitor cardiorespiratori health yet knowledg previous multifract investig exerciseinduc chang heart rate dynam ambulatori ecg acquir eight healthi particip linear descript statist parameteris multifract singular spectra determin interbeat rr intrabeat qt timeseri exercis multivari analys linear multifract measur discrimin pre postexercis period proport signific correl observ linear multifract measur varianc uniform distribut first three princip compon multifract measur two class measur uncorrel order phase randomis timeseri indic sampl distribut correl properti contribut multifractalilti exploratori studi indic possibl use physic exercis conjunct multifract methodolog adjunct descript autonom mediat modul heart rate

Resumos Similares

Comput Math Methods Med - Transfer function analysis of respiratory and cardiac pulsations in human brain observed on dynamic magnetic resonance images. ( 0,78218441879399 )
Med Biol Eng Comput - Dynamic cerebral autoregulation: different signal processing methods without influence on results and reproducibility. ( 0,768176657097915 )
J Clin Monit Comput - Developing an algorithm for pulse oximetry derived respiratory rate (RR(oxi)): a healthy volunteer study. ( 0,761079855748152 )
Med Biol Eng Comput - Assessment of respiratory flow and efforts using upper-body acceleration. ( 0,721376210155076 )
J Clin Monit Comput - Comparison of spectral entropy and BIS VISTA? monitor during general anesthesia for cardiac surgery. ( 0,713249732865206 )
Comput Math Methods Med - Analysis of visual appearance of retinal nerve fibers in high resolution fundus images: a study on normal subjects. ( 0,706501698948679 )
J Med Syst - Identification of deep sleep and awake with computational EEG measures. ( 0,70356003188989 )
J Clin Monit Comput - An autocalibrating algorithm for non-invasive cardiac output determination based on the analysis of an arterial pressure waveform recorded with radial artery applanation tonometry: a proof of concept pilot analysis. ( 0,699583744374497 )
J Clin Monit Comput - A comparative study of pulse rate variability and heart rate variability in healthy subjects. ( 0,696120870550682 )
J Clin Monit Comput - Non-stationarity of EEG during wakefulness and anaesthesia: advantages of EEG permutation entropy monitoring. ( 0,691005784481029 )
J Med Syst - A novel handheld device for use in remote patient monitoring of heart failure patients--design and preliminary validation on healthy subjects. ( 0,68859040467897 )
J Clin Monit Comput - Morphological analysis of peripheral arterial signals in Takayasu's arteritis. ( 0,686128953925677 )
Med Biol Eng Comput - Fluctuation analysis of respiratory impedance waveform in asthmatic patients: effect of airway obstruction. ( 0,684422734655627 )
Telemed J E Health - Reliability and validity of gait analysis by android-based smartphone. ( 0,677395071065367 )
Comput. Biol. Med. - The dominant morphology of fractionated atrial electrograms has greater temporal stability in persistent as compared with paroxysmal atrial fibrillation. ( 0,677347311208096 )
Comput Methods Programs Biomed - Assessment of time-frequency representation techniques for thoracic sounds analysis. ( 0,673910160724929 )
Artif Intell Med - Automatic sleep scoring: a search for an optimal combination of measures. ( 0,671052799412212 )
Med Biol Eng Comput - Enhanced phase synchronization of blood flow oscillations between heated and adjacent non-heated sacral skin. ( 0,669252674850127 )
J Clin Monit Comput - Increasing signal processing sophistication in the calculation of the respiratory modulation of the photoplethysmogram (DPOP). ( 0,668871128988957 )
Med Biol Eng Comput - Spontaneous contractions of isolated rat portal vein under temperature perturbations. ( 0,668253856511969 )
Comput Methods Programs Biomed - Increased variation of the response index of nociception during noxious stimulation in patients during general anaesthesia. ( 0,665898169149948 )
Med Biol Eng Comput - Heart rate variability and nonlinear dynamic analysis in patients with stress-induced cardiomyopathy. ( 0,665819011934535 )
J Clin Monit Comput - Respiratory change in ECG-wave amplitude is a reliable parameter to estimate intravascular volume status. ( 0,664423961474887 )
Med Biol Eng Comput - Short and longer term repeatability of ballistocardiography in a sitting position with EMFi sensor. ( 0,660901065776918 )
Comput Methods Programs Biomed - Feature extraction of the first difference of EMG time series for EMG pattern recognition. ( 0,655153179091267 )
J Clin Monit Comput - Validation of indirect calorimetry for measurement of energy expenditure in healthy volunteers undergoing pressure controlled non-invasive ventilation support. ( 0,65384061169996 )
J Clin Monit Comput - Power spectral analysis of plethysmographic pulse waveform in pregnant women. ( 0,646856251547536 )
J Clin Monit Comput - Using the multi-parameter variability of photoplethysmographic signals to evaluate short-term cardiovascular regulation. ( 0,646717109919545 )
J Clin Monit Comput - Pulse oximeter plethysmograph variation and its relationship to the arterial waveform in mechanically ventilated children. ( 0,645035798693416 )
J Clin Monit Comput - Noninvasive continuous beat-to-beat radial artery pressure via TL-200 applanation tonometry. ( 0,644686843136161 )
J Clin Monit Comput - Impaired cerebrovascular reactivity after acute traumatic brain injury can be detected by wavelet phase coherence analysis of the intracranial and arterial blood pressure signals. ( 0,644513317828846 )
Comput. Biol. Med. - Blood glucose level reconstruction as a function of transcapillary glucose transport. ( 0,642991708544869 )
Comput. Biol. Med. - Current methods in electrocardiogram characterization. ( 0,641433791492545 )
J Clin Monit Comput - The effects of low-dose ketamine on the analgesia nociception index (ANI) measured with the novel PhysioDoloris? analgesia monitor: a pilot study. ( 0,638405866068495 )
Med Biol Eng Comput - A technique based on laser Doppler flowmetry and photoplethysmography for simultaneously monitoring blood flow at different tissue depths. ( 0,637757438101521 )
Comput. Biol. Med. - Non-uniform multivariate embedding to assess the information transfer in cardiovascular and cardiorespiratory variability series. ( 0,635759228977587 )
IEEE Trans Image Process - Stable and Robust Sampling Strategies for Compressive Imaging. ( 0,634298898804379 )
Comput Methods Programs Biomed - Assessment of bilateral photoplethysmography for lower limb peripheral vascular occlusive disease using color relation analysis classifier. ( 0,63334454158153 )
Med Biol Eng Comput - Phonographic signal with a fractional-order chaotic system: a novel and simple algorithm for analyzing residual arteriovenous access stenosis. ( 0,633212847470175 )
J Clin Monit Comput - Parameter selection in permutation entropy for an electroencephalographic measure of isoflurane anesthetic drug effect. ( 0,632166691996335 )
Comput Methods Programs Biomed - Wave reflection quantification based on pressure waveforms alone--methods, comparison, and clinical covariates. ( 0,629790092872835 )
J Clin Monit Comput - The effect of skin incision on the electroencephalogram during general anesthesia maintained with propofol or desflurane. ( 0,629114240970012 )
Methods Inf Med - Measuring inter-observer agreement in contour delineation of medical imaging in a dummy run using Fleiss' kappa. ( 0,627238041639502 )
J Clin Monit Comput - A quantitative EEG method for detecting post clamp changes during carotid endarterectomy. ( 0,627126448311259 )
Med Biol Eng Comput - Assessing spatial resolution versus sensitivity from laser speckle contrast imaging: application to frequency analysis. ( 0,625637103677577 )
Comput Math Methods Med - A wavelet transform based method to determine depth of anesthesia to prevent awareness during general anesthesia. ( 0,623357894762402 )
Comput Methods Programs Biomed - Power line interference filtering on surface electromyography based on the stationary wavelet packet transform. ( 0,621354270685884 )
J Clin Monit Comput - Noninvasive cardiac output monitoring during exercise testing: Nexfin pulse contour analysis compared to an inert gas rebreathing method and respired gas analysis. ( 0,620736527854211 )
Comput Methods Programs Biomed - Linear and nonlinear analysis of normal and CAD-affected heart rate signals. ( 0,620714285376918 )
J Clin Monit Comput - Multi-scale sample entropy of electroencephalography during sevoflurane anesthesia. ( 0,620321608818541 )
Comput Math Methods Med - Multiscale cross-approximate entropy analysis as a measurement of complexity between ECG R-R interval and PPG pulse amplitude series among the normal and diabetic subjects. ( 0,618473469825609 )
Comput Methods Programs Biomed - Automatic moment segmentation and peak detection analysis of heart sound pattern via short-time modified Hilbert transform. ( 0,617801576335833 )
J Clin Monit Comput - Radial-femoral concordance in time and frequency domain-based estimates of systemic arterial respiratory variation. ( 0,616382617085594 )
Comput Math Methods Med - Novel application of a multiscale entropy index as a sensitive tool for detecting subtle vascular abnormalities in the aged and diabetic. ( 0,612772331270945 )
J Clin Monit Comput - SNAP II versus BIS VISTA monitor comparison during general anesthesia. ( 0,611542774379166 )
Comput Math Methods Med - The analysis of surface EMG signals with the wavelet-based correlation dimension method. ( 0,611233839334532 )
IEEE J Biomed Health Inform - Sleep and wake classification with actigraphy and respiratory effort using dynamic warping. ( 0,610351333646908 )
J Clin Monit Comput - Validation of the new Complior sensor to record pressure signals non-invasively. ( 0,609191147847388 )
Med Biol Eng Comput - Effect of respiration on Korotkoff sounds and oscillometric cuff pressure pulses during blood pressure measurement. ( 0,608973481854191 )
Comput Methods Programs Biomed - Automated sleep stage identification system based on time-frequency analysis of a single EEG channel and random forest classifier. ( 0,604054343605743 )
J Med Syst - Determining the appropriate amount of anesthetic gas using DWT and EMD combined with neural network. ( 0,603921445367074 )
Med Biol Eng Comput - Monitoring respiration in wheezy preschool children by pulse oximetry plethysmogram analysis. ( 0,603890762630455 )
Med Biol Eng Comput - Higuchi's fractal dimension for analysis of the effect of external periodic stressor on electrical oscillations in the brain. ( 0,603007736758665 )
Med Biol Eng Comput - Stability and distribution of steady-state somatosensory evoked potentials elicited by vibro-tactile stimulation. ( 0,602043970257483 )
Comput Methods Programs Biomed - An approach towards realizing the intelligent sphygmogram sampling for e-home healthcare. ( 0,601476267450188 )
Comput. Biol. Med. - Atrial activity selection for atrial fibrillation ECG recordings. ( 0,60073093349322 )
Methods Inf Med - Prediction of countershock success in patients using the autoregressive spectral estimation. ( 0,599724707487229 )
J Clin Monit Comput - The impact of systemic vascular resistance on the accuracy of the FloTrac/Vigileo? system in the perioperative period of cardiac surgery: a prospective observational comparison study. ( 0,599453369752515 )
J Clin Monit Comput - Impact of central hypovolemia on photoplethysmographic waveform parameters in healthy volunteers part 2: frequency domain analysis. ( 0,599439085416844 )
Methods Inf Med - Linear and nonlinear analysis of base lung sound in extrinsic allergic alveolitis patients in comparison to healthy subjects. ( 0,598263846852696 )
J Clin Monit Comput - Cardiac index measurements by transcutaneous Doppler ultrasound and transthoracic echocardiography in adult and pediatric emergency patients. ( 0,59702756899103 )
Comput Math Methods Med - Automatic identification of motion artifacts in EHG recording for robust analysis of uterine contractions. ( 0,59523909357363 )
J Med Syst - Direct numerical simulation of single leukocyte deformation in microchannel flow for disease diagnosis. ( 0,594286563267125 )
Methods Inf Med - Linear and fractal heart rate dynamics during sleep at high altitude. Investigation with textile technology. ( 0,592362278046416 )
J Med Syst - Relationship between measurement site and motion artifacts in wearable reflected photoplethysmography. ( 0,592266503199109 )
J Med Syst - Analysis of spike waves in epilepsy using Hilbert-Huang transform. ( 0,59061967746029 )
Med Biol Eng Comput - Discrimination of left and right leg motor imagery for brain-computer interfaces. ( 0,59001263823694 )
Med Biol Eng Comput - Directional dual-tree complex wavelet packet transforms for processing quadrature signals. ( 0,589354557980585 )
Comput Methods Programs Biomed - Assessment of ventricular contractility and ventricular-arterial coupling with a model-based sensor. ( 0,58889074950431 )
Comput Math Methods Med - Influence of distal resistance and proximal stiffness on hemodynamics and RV afterload in progression and treatments of pulmonary hypertension: a computational study with validation using animal models. ( 0,588079039954073 )
Med Biol Eng Comput - Estimation of mean arterial pressure from the oscillometric cuff pressure: comparison of different techniques. ( 0,587330022650821 )
J Clin Monit Comput - Analysis of plethysmographic waveform changes induced by beach chair positioning under general anesthesia. ( 0,587203494837376 )
Comput Methods Programs Biomed - Indirect measurement of the vascular endothelial glycocalyx layer thickness in human submucosal capillaries with a plug-in for ImageJ. ( 0,587070038856345 )
Comput. Biol. Med. - Hybrid fusion of linear, non-linear and spectral models for the dynamic modeling of sEMG and skeletal muscle force: an application to upper extremity amputation. ( 0,585299584081573 )
Comput. Biol. Med. - Alcoholism-related alterations in spectrum, coherence, and phase synchrony of topical electroencephalogram. ( 0,584904309437518 )
J Clin Monit Comput - Respiratory parameters as a surrogate marker for duration of intubation: potential application of automated vital sign collection. ( 0,583533361573459 )
Neural Comput - Delay differential analysis of electroencephalographic data. ( 0,581151104744225 )
Methods Inf Med - Time-varying methods for characterizing nonstationary dynamics of physiological systems. ( 0,581056528151455 )
Comput Math Methods Med - Investigating properties of the cardiovascular system using innovative analysis algorithms based on ensemble empirical mode decomposition. ( 0,581048327114747 )
Med Biol Eng Comput - Reconstruction of gastric slow wave from finger photoplethysmographic signal using radial basis function neural network. ( 0,580656124351791 )
Comput. Biol. Med. - Spectral analysis of heart rate variability with the autoregressive method: what model order to choose? ( 0,579896743850093 )
J Clin Monit Comput - Isocapnic hyperpnea with a portable device in Cystic Fibrosis: an agreement study between two different set-up modalities. ( 0,578917836356263 )
Med Biol Eng Comput - A method for continuously assessing the autonomic response to music-induced emotions through HRV analysis. ( 0,578847060445481 )
Med Biol Eng Comput - Classification of surface electromyographic signals by means of multifractal singularity spectrum. ( 0,578425870927932 )
Med Biol Eng Comput - Cross-correlation of EEG frequency bands and heart rate variability for sleep apnoea classification. ( 0,577888333682747 )
Comput Methods Programs Biomed - Texture analysis of poly-adenylated mRNA staining following global brain ischemia and reperfusion. ( 0,577768646459859 )
J Med Syst - The effect of multiscale PCA de-noising in epileptic seizure detection. ( 0,576209361129063 )
BMC Med Inform Decis Mak - An adaptive Kalman filter approach for cardiorespiratory signal extraction and fusion of non-contacting sensors. ( 0,576157333192213 )
Comput Math Methods Med - A new high-resolution spectral approach to noninvasively evaluate wall deformations in arteries. ( 0,576074546060731 )
Comput Methods Programs Biomed - A novel method for concentration evaluation of reading behaviors with electrical activity recorded on the scalp. ( 0,575877835015993 )