J Clin Monit Comput - Respiratory change in ECG-wave amplitude is a reliable parameter to estimate intravascular volume status.


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


Electrocardiogram (ECG) is a standard type of monitoring in intensive care medicine. Several studies suggest that changes in ECG morphology may reflect changes in volume status. The "Brody effect", a theoretical analysis of left ventricular (LV) chamber size influence on QRS-wave amplitude, is the key element of this phenomenon. It is characterised by an increase in QRS-wave amplitude that is induced by an increase in ventricular preload. This study investigated the influence of changes in intravascular volume status on respiratory variations of QRS-wave amplitudes (ECG) compared with respiratory pulse pressure variations (PP), considered as a reference standard. In 17 pigs, ECG and arterial pressure were recorded. QRS-wave amplitude was measured from the Biopac recording to ensure that in all animals ECG electrodes were always at the same location. Maximal QRS amplitude (ECGmax) and minimal QRS amplitude (ECGmin) were determined over one respiratory cycle. ECG was calculated as 100??[(ECGmax?-?ECGmin)/(ECGmax?+?ECGmin)/2]. ECG and PP were simultaneously recorded. Measurements were performed at different time points: during normovolemic conditions, after haemorrhage (25?mL/kg), and following re-transfusion (25?mL/kg) with constant tidal volume (10?mL/kg) and respiration rate (15 breath/min). At baseline, PP and ECG were both <12?%. PP were significantly correlated with ECG (r(2)?=?0.89, p?<?0.001). Volume loss induced by haemorrhage increased significantly PP and ECG. Moreover, during this state, PP were significantly correlated with ECG (r(2)?=?0.86, p?<?0.001). Re-transfusion significantly decreased PP and ECG, and PP were significantly correlated with ECG (r(2)?=?0.90, p?<?0.001). The observed correlations between PP and ECG at each time point of the study suggest that ECG is a reliable parameter to estimate the changes in intravascular volume status and provide experimental confirmation of the "Brody effect."

Resumo Limpo

electrocardiogram ecg standard type monitor intens care medicin sever studi suggest chang ecg morpholog may reflect chang volum status brodi effect theoret analysi left ventricular lv chamber size influenc qrswave amplitud key element phenomenon characteris increas qrswave amplitud induc increas ventricular preload studi investig influenc chang intravascular volum status respiratori variat qrswave amplitud ecg compar respiratori puls pressur variat pp consid refer standard pig ecg arteri pressur record qrswave amplitud measur biopac record ensur anim ecg electrod alway locat maxim qrs amplitud ecgmax minim qrs amplitud ecgmin determin one respiratori cycl ecg calcul ecgmaxecgminecgmaxecgmin ecg pp simultan record measur perform differ time point normovolem condit haemorrhag mlkg follow retransfus mlkg constant tidal volum mlkg respir rate breathmin baselin pp ecg pp signific correl ecg r p volum loss induc haemorrhag increas signific pp ecg moreov state pp signific correl ecg r p retransfus signific decreas pp ecg pp signific correl ecg r p observ correl pp ecg time point studi suggest ecg reliabl paramet estim chang intravascular volum status provid experiment confirm brodi effect

Resumos Similares

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. ( 0,900416189476547 )
J Clin Monit Comput - Power spectral analysis of plethysmographic pulse waveform in pregnant women. ( 0,863857727656459 )
Med Biol Eng Comput - Enhanced phase synchronization of blood flow oscillations between heated and adjacent non-heated sacral skin. ( 0,859499720767675 )
J Clin Monit Comput - Morphological analysis of peripheral arterial signals in Takayasu's arteritis. ( 0,851275678033673 )
Med Biol Eng Comput - Discrimination of left and right leg motor imagery for brain-computer interfaces. ( 0,815144572438936 )
Comput. Biol. Med. - Non-uniform multivariate embedding to assess the information transfer in cardiovascular and cardiorespiratory variability series. ( 0,813103115301649 )
Comput. Biol. Med. - Current methods in electrocardiogram characterization. ( 0,812898173401109 )
Methods Inf Med - Prediction of countershock success in patients using the autoregressive spectral estimation. ( 0,812231402570466 )
Methods Inf Med - Linear and fractal heart rate dynamics during sleep at high altitude. Investigation with textile technology. ( 0,81081727012825 )
J Clin Monit Comput - A quantitative EEG method for detecting post clamp changes during carotid endarterectomy. ( 0,807540887060177 )
J Clin Monit Comput - Impact of central hypovolemia on photoplethysmographic waveform parameters in healthy volunteers part 2: frequency domain analysis. ( 0,801170068752786 )
J Clin Monit Comput - Validation of the new Complior sensor to record pressure signals non-invasively. ( 0,799350835452604 )
J Med Syst - Relationship between measurement site and motion artifacts in wearable reflected photoplethysmography. ( 0,79892045180182 )
Comput Math Methods Med - Transfer function analysis of respiratory and cardiac pulsations in human brain observed on dynamic magnetic resonance images. ( 0,795898113165045 )
Comput. Biol. Med. - Binary symbolic dynamics classifies heart rate variability patterns linked to autonomic modulations. ( 0,792628028056085 )
Comput Methods Programs Biomed - An approach towards realizing the intelligent sphygmogram sampling for e-home healthcare. ( 0,778495116573132 )
Med Biol Eng Comput - A method for continuously assessing the autonomic response to music-induced emotions through HRV analysis. ( 0,777984101337549 )
Med Biol Eng Comput - Effect of respiration on Korotkoff sounds and oscillometric cuff pressure pulses during blood pressure measurement. ( 0,772923644967438 )
Med Biol Eng Comput - Monitoring respiration in wheezy preschool children by pulse oximetry plethysmogram analysis. ( 0,772754837075218 )
Med Biol Eng Comput - Directional dual-tree complex wavelet packet transforms for processing quadrature signals. ( 0,768719123690923 )
Methods Inf Med - Long-term correlations and complexity analysis of the heart rate variability signal during sleep. Comparing normal and pathologic subjects. ( 0,767344707998013 )
Comput. Biol. Med. - Prediction of pharmacologically induced baroreflex sensitivity from local time and frequency domain indices of R-R interval and systolic blood pressure signals obtained during deep breathing. ( 0,767321078927329 )
Comput Methods Programs Biomed - Linear and nonlinear analysis of normal and CAD-affected heart rate signals. ( 0,760419955268438 )
Comput Methods Programs Biomed - Like/dislike analysis using EEG: determination of most discriminative channels and frequencies. ( 0,757018409450323 )
Med Biol Eng Comput - Heart rate variability and nonlinear dynamic analysis in patients with stress-induced cardiomyopathy. ( 0,754931315332822 )
Comput Methods Programs Biomed - Averaging in vitro cardiac field potential recordings obtained with microelectrode arrays. ( 0,754399000086498 )
Comput Methods Programs Biomed - Texture analysis of poly-adenylated mRNA staining following global brain ischemia and reperfusion. ( 0,753664024014843 )
J Med Syst - The advantages of wearable green reflected photoplethysmography. ( 0,745481907834532 )
Comput. Biol. Med. - Passive fetal monitoring by adaptive wavelet denoising method. ( 0,743253694321185 )
Med Biol Eng Comput - Characterization of QT and RR interval series during acute myocardial ischemia by means of recurrence quantification analysis. ( 0,741859523097603 )
Comput. Biol. Med. - Estimating cognitive workload using wavelet entropy-based features during an arithmetic task. ( 0,740139584515449 )
IEEE J Biomed Health Inform - Sleep and wake classification with actigraphy and respiratory effort using dynamic warping. ( 0,737759201450539 )
Int J Neural Syst - Detection of driving fatigue by using noncontact EMG and ECG signals measurement system. ( 0,737386410007809 )
Comput Methods Programs Biomed - Determination of ECoG information flow activity based on Granger causality and Hilbert transformation. ( 0,735628672070031 )
Methods Inf Med - Linear and nonlinear analysis of base lung sound in extrinsic allergic alveolitis patients in comparison to healthy subjects. ( 0,735005840943607 )
J Clin Monit Comput - Non-stationarity of EEG during wakefulness and anaesthesia: advantages of EEG permutation entropy monitoring. ( 0,734867618999045 )
Comput Math Methods Med - A wavelet transform based method to determine depth of anesthesia to prevent awareness during general anesthesia. ( 0,733245718150516 )
Comput Methods Programs Biomed - Automatic moment segmentation and peak detection analysis of heart sound pattern via short-time modified Hilbert transform. ( 0,732821560452 )
Med Biol Eng Comput - Cross-correlation of EEG frequency bands and heart rate variability for sleep apnoea classification. ( 0,732633176061894 )
J Med Syst - Adaptive network-based fuzzy inference system for assessment of lower limb peripheral vascular occlusive disease. ( 0,731602549714597 )
Comput Math Methods Med - Higher-order spectrum in understanding nonlinearity in EEG rhythms. ( 0,730945663786307 )
Comput Methods Programs Biomed - A new algorithm for quadratic sample entropy optimization for very short biomedical signals: application to blood pressure records. ( 0,72803776781317 )
J Med Syst - Determining the appropriate amount of anesthetic gas using DWT and EMD combined with neural network. ( 0,72785264009284 )
Med Biol Eng Comput - QRS subtraction for atrial electrograms: flat, linear and spline interpolations. ( 0,72688701139033 )
Comput. Biol. Med. - Multiscale entropy and detrended fluctuation analysis of QT interval and heart rate variability during normal pregnancy. ( 0,725686576773507 )
J Med Syst - Design and development of a heart rate variability analyzer. ( 0,725596685041334 )
Methods Inf Med - Robust detection of sleep apnea from Holter ECGs. Joint assessment of modulations in QRS amplitude and respiratory myogram interference. ( 0,723943592384553 )
J Clin Monit Comput - A comparative study of pulse rate variability and heart rate variability in healthy subjects. ( 0,722211220225581 )
J Clin Monit Comput - Radial-femoral concordance in time and frequency domain-based estimates of systemic arterial respiratory variation. ( 0,721033150097162 )
J Clin Monit Comput - Intraoperative MRI electrical noise and monitor ECG filters affect arrhythmia detection and identification. ( 0,720282083041407 )
Med Biol Eng Comput - Comparison of real beat-to-beat signals with commercially available 4?Hz sampling on the evaluation of foetal heart rate variability. ( 0,719523856696784 )
Comput Math Methods Med - Investigating properties of the cardiovascular system using innovative analysis algorithms based on ensemble empirical mode decomposition. ( 0,719436170470567 )
Comput Methods Programs Biomed - QRS detection based on wavelet coefficients. ( 0,719431788648668 )
Comput Methods Programs Biomed - Automatic heart sound detection in pediatric patients without electrocardiogram reference via pseudo-affine Wigner-Ville distribution and Haar wavelet lifting. ( 0,717394117537725 )
Methods Inf Med - Segmented Poincar? plot analysis for risk stratification in patients with dilated cardiomyopathy. ( 0,713882563365122 )
Methods Inf Med - Classification of sleep stages using multi-wavelet time frequency entropy and LDA. ( 0,713016379454279 )
Comput Methods Programs Biomed - Epileptic seizure classification in EEG signals using second-order difference plot of intrinsic mode functions. ( 0,712321225918122 )
Comput Methods Programs Biomed - An R-peak detection method that uses an SVD filter and a search back system. ( 0,711209839663699 )
J Clin Monit Comput - Multi-scale sample entropy of electroencephalography during sevoflurane anesthesia. ( 0,710734686353228 )
Med Biol Eng Comput - Classification of surface electromyographic signals by means of multifractal singularity spectrum. ( 0,709768092988987 )
J Clin Monit Comput - Analysis of heart rate variability during auditory stimulation periods in patients with schizophrenia. ( 0,709371391369641 )
Comput Methods Programs Biomed - Increasing sensitivity in the measurement of heart rate variability: the method of non-stationary RR time-frequency analysis. ( 0,707041223976366 )
Comput Math Methods Med - Fetal ECG extraction from abdominal signals: a review on suppression of fundamental power line interference component and its harmonics. ( 0,706794053252235 )
J Clin Monit Comput - The effect of skin incision on the electroencephalogram during general anesthesia maintained with propofol or desflurane. ( 0,705249034984106 )
Comput Math Methods Med - Probabilistic source separation for robust fetal electrocardiography. ( 0,702465920132935 )
Comput Methods Programs Biomed - Automated sleep stage identification system based on time-frequency analysis of a single EEG channel and random forest classifier. ( 0,702294966634971 )
IEEE J Biomed Health Inform - EEG activity during movement planning encodes upcoming peak speed and acceleration and improves the accuracy in predicting hand kinematics. ( 0,701972179571676 )
Comput Methods Programs Biomed - Optimal channel selection for analysis of EEG-sleep patterns of neonates. ( 0,700884709943433 )
J Clin Monit Comput - Changes in cardiac output and stroke volume as measured by non-invasive CO monitoring in infants with RSV bronchiolitis. ( 0,70075710445394 )
J Med Syst - Analysis of spike waves in epilepsy using Hilbert-Huang transform. ( 0,700231172729634 )
Methods Inf Med - Time-varying methods for characterizing nonstationary dynamics of physiological systems. ( 0,69991589402617 )
Int J Neural Syst - Application of higher order cumulant features for cardiac health diagnosis using ECG signals. ( 0,699810565021147 )
IEEE J Biomed Health Inform - BreathSens: A Continuous On-Bed Respiratory Monitoring System With Torso Localization Using an Unobtrusive Pressure Sensing Array. ( 0,698541026282346 )
Comput Methods Programs Biomed - An application of fractional differintegration to heart rate variability time series. ( 0,698264223162161 )
Comput Methods Programs Biomed - Analysis of normal and epileptic seizure EEG signals using empirical mode decomposition. ( 0,697802870347377 )
Med Biol Eng Comput - A technique based on laser Doppler flowmetry and photoplethysmography for simultaneously monitoring blood flow at different tissue depths. ( 0,697336257318697 )
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. ( 0,695633086196125 )
J Clin Monit Comput - ECG myogenic artifacts during clonic seizures: a disturbing (and interesting) finding. ( 0,695150050426606 )
Med Biol Eng Comput - Frequency range extension of spectral analysis of pulse rate variability based on Hilbert-Huang transform. ( 0,694796648510442 )
Med Biol Eng Comput - Investigation of photoplethysmographic signals and blood oxygen saturation values on healthy volunteers during cuff-induced hypoperfusion using a multimode PPG/SpO2 sensor. ( 0,694672182973667 )
Med Biol Eng Comput - Point process time-frequency analysis of dynamic respiratory patterns during meditation practice. ( 0,694650111258472 )
Comput. Biol. Med. - Computational method for high resolution spectral analysis of fractionated atrial electrograms. ( 0,693805761300322 )
Comput. Biol. Med. - Path length entropy analysis of diastolic heart sounds. ( 0,693552436151088 )
Med Biol Eng Comput - Reconstruction of gastric slow wave from finger photoplethysmographic signal using radial basis function neural network. ( 0,692226975212804 )
Med Biol Eng Comput - Effects of fetal respiratory movements on the short-term fractal properties of heart rate variability. ( 0,692203013188287 )
J Biomed Inform - A general framework for time series data mining based on event analysis: application to the medical domains of electroencephalography and stabilometry. ( 0,69077749793853 )
Med Biol Eng Comput - The effect of precordial lead displacement on ECG morphology. ( 0,690050257659341 )
Comput. Biol. Med. - A novel electrocardiogram parameterization algorithm and its application in myocardial infarction detection. ( 0,688018989713068 )
Comput. Biol. Med. - Analysis of heart rate variability using fuzzy measure entropy. ( 0,687974740293048 )
Comput Methods Programs Biomed - Broadband noise suppression and feature identification of ECG waveforms using mathematical morphology and embedding theorem. ( 0,686240487977176 )
J Clin Monit Comput - Multimodal noninvasive monitoring of soft tissue wound healing. ( 0,685961321531302 )
Comput. Biol. Med. - Mitigating the effect of non-stationarity in spectral analysis-an application to neonate heart rate analysis. ( 0,685903967654203 )
Comput Math Methods Med - An automated optimal engagement and attention detection system using electrocardiogram. ( 0,685690023803816 )
J Telemed Telecare - ECG telemonitoring during home-based cardiac rehabilitation in heart failure patients. ( 0,684807189515582 )
IEEE J Biomed Health Inform - A low-complexity ECG feature extraction algorithm for mobile healthcare applications. ( 0,683748243354834 )
Comput. Biol. Med. - Quantification of the acute effect of a low dose of red wine by nonlinear measures of RR and QT interval series in healthy subjects. ( 0,683051706951672 )
J Med Syst - Multi-feature characterization of epileptic activity for construction of an automated internet-based annotated classification. ( 0,682497859451322 )
Comput Methods Programs Biomed - QRS detection using S-Transform and Shannon energy. ( 0,681880086630378 )
J Med Syst - Employment and comparison of different Artificial Neural Networks for epilepsy diagnosis from EEG signals. ( 0,681592785373817 )
Med Biol Eng Comput - Evaluation of ventricular repolarization dispersion during acute myocardial ischemia: spatial and temporal ECG indices. ( 0,680342769166663 )