Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 109 for “"QT"”.
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Automatic detection of qt and related intervals
… afld the Tend to measure the intervals such as QT, QT corrected (QTc), RT, QT_{max} and RT_{max} respectively. The second section deals with the analysis of different variabilities including heart rate variability (HRV), QT, QTc, RT, QT_{max} and RT_{max}. Using the R wave points as reference …
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QT-interval adaptation to changes in autonomic balance
… analysis, we quantify the variability of the QT interval, which is primarily modulated by the sympathetic nervous system. We also estimate the time constant of the sympathetic nervous system by least-squares fitting of the QT time series resulting from step perturbations in autonomic balance. …
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The role of the perinexus in Long QT Syndrome Type 3
… sodium channel (Nav1.5) leads to Long QT Syndrome Type 3 (LQT3). LQT3 phenotype can be exacerbated by expanding the perinexus, which is an intercellular nanodomain with high density of Nav1.5 in the intercalated disc. Following this finding, we found that elevating extracellular sodium …
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Improving Patient Safety by Calculating the QT Correction in Critical Care Patients
<p>Prolonged QTc is recognized as a precursor to Torsades de Points and other lethal ventricular arrhythmias. 52% or patients in critical care units have prolonged QTc and 69% or critical care patients have risks of developing QTc. Many commonly administered medications in the critical care unit …
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QT variability calculation using a template matching algorithm and power spectral analysis
… the thrust of research conducted in this field. QT variability is another topic on which little research has been done. This thesis uses an algorithm proposed by Dr. Berger, published in 2003. The algorithm stretches the template in the time domain, and composes a sum-squared error function, …
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Model Based Analysis of QT Variability Independent of Heart Rate and Respiration
… elicited by orthostatic stress. Measurements of QTV independent of heart rate and respiration from single leads (II and V5) are compared to that of multi-lead approaches in a group of coronary artery disease patients to investigate the suitability of singlelead ECG for the analysis of …
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Corrección del intervalo QT en presencia de trastornos severos de la despolarización ventricular
… que el ensanchamiento del QRS presenta sobre el QT, desarrollar y validar una nueva fórmula de corrección en este contexto y evaluar la precisión diagnóstica de los métodos de corrección por frecuencia cardiaca. Métodos: En 28 pacientes admitidos para implante de una válvula aórtica …
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Human Nav1.5 F1486 deletion associated with long-QT syndrome leads to deficiency in inactivation and reduces lidocaine sensitivity
… Nav1.5, have been well documented to cause long-QT syndrome (LQTs) by disrupting channel inactivation and increasing late sodium current. Previous studies have revealed the importance of the intracellular loop region between transmembrane domain III and IV of sodium channel α subunit in …
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Epitaxial nanolayers of large organic molecules
… Substraten mit Hilfe der Quaterrylenderivate QT, QTCDI und QTCMI untersucht. Um derartige Schichten herstellen und charakterisieren zu können, wurde eine Organische Molekularstrahlepitaxy (OMBE)-Anlage aufgebaut. Allerdings stellt OMBE bisher nur ein Standardverfahren für die Präparation …
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Mistura (O2-O3) no tratamento integrado de cadelas com câncer de mama: perfil oxidativo e qualidade de vida
… of the tumour, carboplatin chemotherapy (QT), total oxidizing capacity analysis (TAC), malondialdehyde concentration (MDA), as well as the evaluation of the Survival, rate quality of life scores and graduation of adverse reactions resulting from chemotherapy. Blood samples for antioxidant …
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The Association of Single Nucleotide Polymorphisms (SNPs) in the Nitric Oxide Synthase 1 Adaptor Protein Gene (NOS1AP) and the QT Interval Duration Across Race/Ethnicity in Adults Without Clinical Cardiovascular Disease
Introduction: The QT interval is an independent risk factor for sudden cardiac death (SCD). A genome wide association study (GWAS) identified NOS1AP variants associated with QT, which has been replicated in predominantly Caucasian populations. The MESA study provides an opportunity to study single …
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Verlauf der ventrikulären Repolarisation nach plötzlichen Veränderungen der Herzfrequenz im ventrikulären Tachykardiemodell
… Parameter im Oberflächen-EKGs verglichen: <br>·QT-Intervall (QT): Nach den VT-Phasen zeigte sich ein dynamischer Adaptationsprozeß, der unmittelbar nach VT-Ende schneller verlief, um sich im weiteren Verlauf zu verlangsamen. Je höher die Frequenz der vorherigen VT, um so schneller verlief die …
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