Search results for " Electrocardiography"

showing 2 items of 12 documents

Introduction to coronary imaging with 64-slice computed tomography

2005

The aim of this article is to illustrate the main technical improvements in the last generation of 64-row CT scanners and the possible applications in coronary angiography. In particular, we describe the new physical components (X-ray tube-detectors system) and the general scan and reconstruction parameters. We then define the scan protocols for coronary angiography with the new generation of 64-row CT scanners to enable radiologists to perform a CT study on the basis of the diagnostic possibilities.

Time FactorsImaging Sensitivity and Specificity Stents Time Factors TomographyContrast MediaSensitivity and Specificity64-row CTElectrocardiographyHeart RateSpiral Computed TomographyImage Processing Computer-AssistedHumanstechnical improvementsCoronary Artery BypassPhantoms ImagingPatient SelectionAlgorithms Artifacts Contrast Media Coronary Angiography/instrumentation/*methods Coronary Artery Bypass Coronary Stenosis/*radiography Electrocardiography Heart Rate Humans Image Processing; Computer-Assisted Patient Selection Phantoms; Imaging Sensitivity and Specificity Stents Time Factors Tomography; Spiral Computed Tomography; X-Ray Computed/instrumentation/*methodsCoronary StenosisComputer-Assisted Patient Selection PhantomsX-Ray Computed/instrumentation/*methodstechnical improvements; 64-row CT; coronary angiographyComputer-Assisted Patient Selection PhantomStentsAlgorithms Artifacts Contrast Media Coronary Angiography/instrumentation/*methods Coronary Artery Bypass Coronary Stenosis/*radiography Electrocardiography Heart Rate Humans Image Processingcoronary angiographyArtifactsTomography X-Ray ComputedTomography Spiral ComputedAlgorithms
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Feasibility of Ultra-Short-Term Analysis of Heart Rate and Systolic Arterial Pressure Variability at Rest and during Stress via Time-Domain and Entro…

2022

Heart Rate Variability (HRV) and Blood Pressure Variability (BPV) are widely employed tools for characterizing the complex behavior of cardiovascular dynamics. Usually, HRV and BPV analyses are carried out through short-term (ST) measurements, which exploit ~five-minute-long recordings. Recent research efforts are focused on reducing the time series length, assessing whether and to what extent Ultra-Short-Term (UST) analysis is capable of extracting information about cardiovascular variability from very short recordings. In this work, we compare ST and UST measures computed on electrocardiographic R-R intervals and systolic arterial pressure time series obtained at rest and during both post…

electrocardiography (ECG)Short-Term (ST) cardiovascular variabilityBlood PressureHeart Rate Variability (HRV)Settore ING-INF/01 - ElettronicaBiochemistryAtomic and Molecular Physics and OpticsHeart Rate Variability (HRV); Short-Term (ST) cardiovascular variability; Ultra-Short-Term (UST) HRV; electrocardiography (ECG); Systolic Arterial Pressure (SAP); entropy; conditional entropy; complexity; time-series analysisUltra-Short- Term (UST) HRVAnalytical Chemistryconditional entropyElectrocardiographyHeart RateSettore ING-INF/06 - Bioingegneria Elettronica E Informaticatime-series analysisArterial PressureElectrical and Electronic EngineeringentropycomplexitySystolic Arterial Pressure (SAP)InstrumentationSensors; Volume 22; Issue 23; Pages: 9149
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