Comput. Biol. Med. - The dominant morphology of fractionated atrial electrograms has greater temporal stability in persistent as compared with paroxysmal atrial fibrillation.


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


CKGROUND: Measurements of both the dominant frequency (DF) and the time series morphology of complex fractionated atrial electrograms (CFAE) are useful to distinguish persistent from paroxysmal atrial fibrillation (AF). In this study, an algorithm was devised to extract morphologic components according to frequency, and its usefulness for distinguishing CFAE was shown.METHOD: CFAE of length 16s were obtained at two sites each from the four pulmonary vein ostia (PV), and from anterior and posterior left atrial free wall (FW), in nine paroxysmal and 10 longstanding persistent AF patients. The DF was computed for each of two 8s CFAE segments in each 16s recording. Each CFAE segment was then transformed into a set of basis vectors, which represent electrogram morphology at each frequency. The dominant morphology (DM) is defined as the ensemble average of sequential signal segments, with the segment length equal to the period at the DF. The DMs of the two 8s pairs were correlated. Normalized correlation coefficients were tabulated for all data, and separately for PV and FW. The means and coefficients of variation of the DM correlation coefficients were then plotted, and a linear discriminant function was used to classify persistent versus paroxysmal AF data. For comparison with DM results, CFE-mean and interval confidence level (ICL) were also calculated for persistent versus paroxysmal AF data.RESULTS: Mean correlation of the DM, 1st 8s versus 2nd 8s data, was 0.62+0.22 for persistent versus 0.50+0.19 for paroxysmal CFAE for all recording sites (p<0.001). At single anatomical locations, correlation was greater in persistents than paroxysmals at all sites, but achieved significance only at the left superior (p<0.001) and right superior (p<0.05) PV. Spatial variation in correlation coefficient was greater in paroxysmal than persistent AF (not significant). Using the means of DF correlation coefficients, 17/19 patients were classified correctly. The CFE-mean parameter averaged 89.01?20.99 ms in persistents versus 93.96?33.81 ms in paroxysmals (p<0.05), while ICL averaged 94.54?18.52 deflections/8s for persistents versus 90.70?19.28 deflections/8s for paroxysmals (p<0.05).CONCLUSIONS: In CFAE recordings, the DM parameter was found to have greater temporal morphologic variation in paroxysmal as compared with persistent AF data (p<0.001). In contrast, only moderate significance between paroxysmal versus persistent AF data was found when using the of CFE-mean and ICL parameters (p<0.05). The DM parameter may thus be useful as a new measure to discern both temporal and spatial variations in CFAE in paroxysmal versus persistent AF recordings.

Resumo Limpo

ckground measur domin frequenc df time seri morpholog complex fraction atrial electrogram cfae use distinguish persist paroxysm atrial fibril af studi algorithm devis extract morpholog compon accord frequenc use distinguish cfae shownmethod cfae length s obtain two site four pulmonari vein ostia pv anterior posterior left atrial free wall fw nine paroxysm longstand persist af patient df comput two s cfae segment s record cfae segment transform set basi vector repres electrogram morpholog frequenc domin morpholog dm defin ensembl averag sequenti signal segment segment length equal period df dms two s pair correl normal correl coeffici tabul data separ pv fw mean coeffici variat dm correl coeffici plot linear discrimin function use classifi persist versus paroxysm af data comparison dm result cfemean interv confid level icl also calcul persist versus paroxysm af dataresult mean correl dm st s versus nd s data persist versus paroxysm cfae record site p singl anatom locat correl greater persist paroxysm site achiev signific left superior p right superior p pv spatial variat correl coeffici greater paroxysm persist af signific use mean df correl coeffici patient classifi correct cfemean paramet averag ms persist versus ms paroxysm p icl averag deflectionss persist versus deflectionss paroxysm pconclus cfae record dm paramet found greater tempor morpholog variat paroxysm compar persist af data p contrast moder signific paroxysm versus persist af data found use cfemean icl paramet p dm paramet may thus use new measur discern tempor spatial variat cfae paroxysm versus persist af record

Resumos Similares

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. ( 0,856551755888641 )
Methods Inf Med - Measuring inter-observer agreement in contour delineation of medical imaging in a dummy run using Fleiss' kappa. ( 0,821265554872002 )
J Clin Monit Comput - Cardiac index measurements by transcutaneous Doppler ultrasound and transthoracic echocardiography in adult and pediatric emergency patients. ( 0,811351372037859 )
J Med Syst - Identification of deep sleep and awake with computational EEG measures. ( 0,791988477366679 )
J Clin Monit Comput - Validation of indirect calorimetry for measurement of energy expenditure in healthy volunteers undergoing pressure controlled non-invasive ventilation support. ( 0,767811379613649 )
J Clin Monit Comput - Peripheral tissue oximetry: comparing three commercial near-infrared spectroscopy oximeters on the forearm. ( 0,75934606447629 )
Med Biol Eng Comput - Short and longer term repeatability of ballistocardiography in a sitting position with EMFi sensor. ( 0,746604397853035 )
J Clin Monit Comput - Masseter muscle oxygen saturation is associated with central venous oxygen saturation in patients with severe sepsis. ( 0,745974281518903 )
Comput Methods Programs Biomed - Transformation of videocapsule images to detect small bowel mucosal differences in celiac versus control patients. ( 0,740781530494546 )
J Med Syst - A novel handheld device for use in remote patient monitoring of heart failure patients--design and preliminary validation on healthy subjects. ( 0,739682504892266 )
J Clin Monit Comput - Parameter selection in permutation entropy for an electroencephalographic measure of isoflurane anesthetic drug effect. ( 0,736708998740088 )
J Clin Monit Comput - Comparison of SNAP? II and BIS Vista indices during normothermic cardiopulmonary bypass under isoflurane anesthesia. ( 0,732599857274469 )
Telemed J E Health - Reliability and validity of gait analysis by android-based smartphone. ( 0,731084211183603 )
J Clin Monit Comput - Comparison of spectral entropy and BIS VISTA? monitor during general anesthesia for cardiac surgery. ( 0,724002614637198 )
Comput Math Methods Med - Semiautomatic segmentation of ventilated airspaces in healthy and asthmatic subjects using hyperpolarized 3He MRI. ( 0,720622534413861 )
Comput Math Methods Med - Analysis of visual appearance of retinal nerve fibers in high resolution fundus images: a study on normal subjects. ( 0,720609218765775 )
Int J Comput Assist Radiol Surg - New method for internal anal sphincter measurements: feasibility study. ( 0,718394218911151 )
J Telemed Telecare - Comparison of two motion sensors for use in cardiac telerehabilitation. ( 0,717557139200289 )
Med Biol Eng Comput - Dynamic cerebral autoregulation: different signal processing methods without influence on results and reproducibility. ( 0,710318057524598 )
Comput. Biol. Med. - Development and evaluation of an algorithm for computer analysis of maternal heart rate during labor. ( 0,704587654957412 )
J Med Syst - Automatic quantification of spinal curvature in scoliotic radiograph using image processing. ( 0,70392289244168 )
Comput. Biol. Med. - Fast generation of T2* maps in the entire range of clinical interest: application to thalassemia major patients. ( 0,697693390456259 )
J Clin Monit Comput - Respiratory parameters as a surrogate marker for duration of intubation: potential application of automated vital sign collection. ( 0,697069827444841 )
Comput Methods Programs Biomed - Assessment of time-frequency representation techniques for thoracic sounds analysis. ( 0,693755600282654 )
Med Biol Eng Comput - Heart rate variability and nonlinear dynamic analysis in patients with stress-induced cardiomyopathy. ( 0,693242546976799 )
Comput Methods Programs Biomed - Indirect measurement of the vascular endothelial glycocalyx layer thickness in human submucosal capillaries with a plug-in for ImageJ. ( 0,691295447869838 )
J Clin Monit Comput - Comparison of ear and chest probes in transcutaneous carbon dioxide pressure measurements during general anesthesia in adults. ( 0,690539581705628 )
Comput. Biol. Med. - Gait variability and stability measures: minimum number of strides and within-session reliability. ( 0,688925487261152 )
Comput Methods Programs Biomed - Multifractal characterisation of electrocardiographic RR and QT time-series before and after progressive exercise. ( 0,677347311208096 )
J Clin Monit Comput - Non-stationarity of EEG during wakefulness and anaesthesia: advantages of EEG permutation entropy monitoring. ( 0,674966895559225 )
Comput Math Methods Med - Long-term prediction of emergency department revenue and visitor volume using autoregressive integrated moving average model. ( 0,671080741071483 )
J Clin Monit Comput - Evaluation of the estimated continuous cardiac output monitoring system in adults and children undergoing kidney transplant surgery: a pilot study. ( 0,67077433275053 )
Med Biol Eng Comput - Assessment of respiratory flow and efforts using upper-body acceleration. ( 0,664002189609214 )
Comput. Biol. Med. - Spectral analysis of heart rate variability with the autoregressive method: what model order to choose? ( 0,650892671825865 )
Med Biol Eng Comput - Fluctuation analysis of respiratory impedance waveform in asthmatic patients: effect of airway obstruction. ( 0,647499977255215 )
Med Biol Eng Comput - Phonographic signal with a fractional-order chaotic system: a novel and simple algorithm for analyzing residual arteriovenous access stenosis. ( 0,646558908996137 )
J Clin Monit Comput - SNAP II versus BIS VISTA monitor comparison during general anesthesia. ( 0,643970988640267 )
Comput. Biol. Med. - Inter- and intra-observer variability analysis of completely automated cIMT measurement software (AtheroEdge?) and its benchmarking against commercial ultrasound scanner and expert Readers. ( 0,641381923708572 )
Comput Methods Programs Biomed - Increased variation of the response index of nociception during noxious stimulation in patients during general anaesthesia. ( 0,64057110685238 )
J Clin Monit Comput - Non-invasive measurement of cardiac output in obese children and adolescents: comparison of electrical cardiometry and transthoracic Doppler echocardiography. ( 0,639936096747688 )
J Clin Monit Comput - Developing an algorithm for pulse oximetry derived respiratory rate (RR(oxi)): a healthy volunteer study. ( 0,63791976530654 )
J Clin Monit Comput - The effect of desflurane versus propofol on regional cerebral oxygenation in the sitting position for shoulder arthroscopy. ( 0,635815850732441 )
Comput Math Methods Med - Paraxial ocular measurements and entries in spectral and modal matrices: analogy and application. ( 0,635232939621887 )
J Clin Monit Comput - The ability of the Vigileo-FloTrac system to measure cardiac output and track cardiac output changes during one-lung ventilation. ( 0,632887295533684 )
Artif Intell Med - Automatic sleep scoring: a search for an optimal combination of measures. ( 0,62734453960581 )
Methods Inf Med - Influence of parameter settings in voxel-based morphometry 8. Using DARTEL and region-of-interest on reproducibility in gray matter volumetry. ( 0,626066428352599 )
Comput Methods Programs Biomed - Feature extraction of the first difference of EMG time series for EMG pattern recognition. ( 0,62594221216342 )
J Clin Monit Comput - Derivation of baseline lung impedance in chronic heart failure patients: use for monitoring pulmonary congestion and predicting admissions for decompensation. ( 0,620807446351221 )
J Clin Monit Comput - Reliability of the volatile agent consumption display in the Draeger Primus? anesthesia machine. ( 0,618895019471315 )
Comput. Biol. Med. - Atrial activity selection for atrial fibrillation ECG recordings. ( 0,617738139282088 )
Int J Health Geogr - Comparing the accuracy of two secondary food environment data sources in the UK across socio-economic and urban/rural divides. ( 0,615893355766213 )
Comput. Biol. Med. - Study on simple reaction and choice times in patients with type I diabetes. ( 0,614196783138383 )
Med Biol Eng Comput - Intra-protocol repeatability and inter-protocol agreement for the analysis of scapulo-humeral coordination. ( 0,613815160999857 )
Comput. Aided Surg. - Non-invasive quantification of lower limb mechanical alignment in flexion. ( 0,612154464544591 )
J Clin Monit Comput - Noninvasive continuous beat-to-beat radial artery pressure via TL-200 applanation tonometry. ( 0,611900657670011 )
J Clin Monit Comput - Validation of continuous and noninvasive hemoglobin monitoring by pulse CO-oximetry in Japanese surgical patients. ( 0,6114838681671 )
Methods Inf Med - Quantitative conjunctival provocation test for controlled clinical trials. ( 0,611165817137835 )
Comput Methods Programs Biomed - Ultrasound IMT measurement on a multi-ethnic and multi-institutional database: our review and experience using four fully automated and one semi-automated methods. ( 0,610137650515799 )
J Clin Monit Comput - NAVA enhances tidal volume and diaphragmatic electro-myographic activity matching: a Range90 analysis of supply and demand. ( 0,605732150729788 )
J Chem Inf Model - Real external predictivity of QSAR models: how to evaluate it? Comparison of different validation criteria and proposal of using the concordance correlation coefficient. ( 0,605448237383862 )
Comput Methods Programs Biomed - Extracting more information from EEG recordings for a better description of sleep. ( 0,604001317220747 )
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. ( 0,59850896548319 )
Comput Math Methods Med - Redundancy as a graph-based index of frequency specific MEG functional connectivity. ( 0,59742662123886 )
Int J Comput Assist Radiol Surg - Independent prognostic value of whole-body metabolic tumor burden from FDG-PET in non-small cell lung cancer. ( 0,597312704869824 )
Res Synth Methods - Practicalities of using a modified version of the Cochrane Collaboration risk of bias tool for randomised and non-randomised study designs applied in a health technology assessment setting. ( 0,595593630724481 )
J Clin Monit Comput - Using the multi-parameter variability of photoplethysmographic signals to evaluate short-term cardiovascular regulation. ( 0,594489770683945 )
Comput Math Methods Med - Automatic identification of motion artifacts in EHG recording for robust analysis of uterine contractions. ( 0,593878545294955 )
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. ( 0,593669290757432 )
Comput. Biol. Med. - Approach for streamlining measurement of complex physiological phenotypes of upper airway collapsibility. ( 0,592137834539259 )
Perspect Health Inf Manag - Projected impact of the ICD-10-CM/PCS conversion on longitudinal data and the Joint Commission Core Measures. ( 0,590953285003564 )
Med Biol Eng Comput - Stability and distribution of steady-state somatosensory evoked potentials elicited by vibro-tactile stimulation. ( 0,585927552176593 )
Comput Methods Programs Biomed - Automated septum thickness measurement--a Kalman filter approach. ( 0,582299912182787 )
Comput Math Methods Med - Statistical evaluation of a fully automated mammographic breast density algorithm. ( 0,57947208460472 )
J Med Syst - Automated diagnosis of diabetes using heart rate variability signals. ( 0,578832132648459 )
Comput Methods Programs Biomed - Improving reliability of live/dead cell counting through automated image mosaicing. ( 0,578272037105086 )
J. Med. Internet Res. - Estimation of physical activity levels using cell phone questionnaires: a comparison with accelerometry for evaluation of between-subject and within-subject variations. ( 0,575631451767399 )
Comput Math Methods Med - A wavelet transform based method to determine depth of anesthesia to prevent awareness during general anesthesia. ( 0,575433405706139 )
Int J Comput Assist Radiol Surg - Multi-modality morphological correlation of axillary lymph nodes. ( 0,574397099847504 )
Med Biol Eng Comput - Spontaneous contractions of isolated rat portal vein under temperature perturbations. ( 0,574177990954724 )
Med Biol Eng Comput - Evaluation of a morphological filter in mean cardiac output determination: application to left ventricular assist devices. ( 0,57395865799577 )
AMIA Annu Symp Proc - When you can't tell when it hurts: a preliminary algorithm to assess pain in patients who can't communicate. ( 0,573126911604122 )
IEEE J Biomed Health Inform - Identification of microsatellites in DNA using adaptive S-transform. ( 0,573126911604122 )
Med Biol Eng Comput - Discrimination power of long-term heart rate variability measures for chronic heart failure detection. ( 0,571078069289204 )
Methods Inf Med - Assessment of pain expression in infant cry signals using empirical mode decomposition. ( 0,570303887446627 )
Med Decis Making - Standard error of measurement of 5 health utility indexes across the range of health for use in estimating reliability and responsiveness. ( 0,567904370075398 )
J Clin Monit Comput - The evaluation of a non-invasive respiratory volume monitor in surgical patients undergoing elective surgery with general anesthesia. ( 0,566524943305302 )
IEEE Trans Image Process - Completely automated multiresolution edge snapper--a new technique for an accurate carotid ultrasound IMT measurement: clinical validation and benchmarking on a multi-institutional database. ( 0,565821728939027 )
Comput. Biol. Med. - Strain measurement from 3D micro-CT images of a breast-mimicking phantom. ( 0,565245659923697 )
J Clin Monit Comput - Comparison of two different generations of NIRS devices and transducers in healthy volunteers and ICU patients. ( 0,563173629574127 )
Med Biol Eng Comput - Quantitative evaluation of upper-limb motor control in robot-aided rehabilitation. ( 0,562936609936922 )
Int J Comput Assist Radiol Surg - Precision of volumetric assessment of proximal femur microarchitecture from high-resolution 3T MRI. ( 0,562885094107489 )
Res Synth Methods - Performance of a proportion-based approach to meta-analytic moderator estimation: results from Monte Carlo simulations. ( 0,56210572582986 )
J Clin Monit Comput - Morphological analysis of peripheral arterial signals in Takayasu's arteritis. ( 0,561729204422685 )
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. ( 0,560441885438424 )
Med Biol Eng Comput - Measurement of the local aortic stiffness by a non-invasive bioelectrical impedance technique. ( 0,55940343873712 )
Sci Data - Reliability of brain volume measurements: a test-retest dataset. ( 0,559020195632533 )
Int J Health Geogr - Influence of satellite-derived rainfall patterns on plague occurrence in northeast Tanzania. ( 0,558669514481276 )
Med Biol Eng Comput - The effect of precordial lead displacement on ECG morphology. ( 0,556145028854679 )
Med Biol Eng Comput - Sleep apnea monitoring and diagnosis based on pulse oximetry and tracheal sound signals. ( 0,553286965570079 )
J Med Syst - The effect of multiscale PCA de-noising in epileptic seizure detection. ( 0,551682371479867 )