Добірка наукової літератури з теми "QT variability"
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Статті в журналах з теми "QT variability"
Berger, Ronald D. "QT variability." Journal of Electrocardiology 36 (December 2003): 83–87. http://dx.doi.org/10.1016/j.jelectrocard.2003.09.019.
Повний текст джерелаDobson, Craig P., Andrew Kim, and Mark Haigney. "QT Variability Index." Progress in Cardiovascular Diseases 56, no. 2 (September 2013): 186–94. http://dx.doi.org/10.1016/j.pcad.2013.07.004.
Повний текст джерелаBerger, Ronald D. "QT Interval Variability." Journal of the American College of Cardiology 54, no. 9 (August 2009): 851–52. http://dx.doi.org/10.1016/j.jacc.2009.06.007.
Повний текст джерелаMagnano, Massimo, Cristina Gallo, Pier Paolo Bocchino, Marco Briguglio, Anna Rivetti, Fiorenzo Gaita, and Matteo Anselmino. "QT prolongation and variability." Journal of Cardiovascular Medicine 20, no. 4 (April 2019): 180–85. http://dx.doi.org/10.2459/jcm.0000000000000773.
Повний текст джерелаZareba, Wojciech, and Antoni Bayes de Luna. "QT Dynamics and Variability." Annals of Noninvasive Electrocardiology 10, no. 2 (April 2005): 256–62. http://dx.doi.org/10.1111/j.1542-474x.2005.10205.x.
Повний текст джерелаTereshchenko, Larisa G., and Ronald D. Berger. "Towards a better understanding of QT interval variability." Therapeutic Advances in Drug Safety 2, no. 6 (September 27, 2011): 245–51. http://dx.doi.org/10.1177/2042098611421209.
Повний текст джерелаYunisova, A. S. "Athletic heart and QT variability." Academy of medicine and sports 2, no. 4 (January 20, 2022): 20–23. http://dx.doi.org/10.15829/2712-7567-2021-38.
Повний текст джерелаHAIGNEY, MARK C. P., SHAMA ALAM, SCOT TEBO, GREGARY MARHEFKA, AHMED ELKASHEF, ROBERTA KAHN, C. NORA CHIANG, FRANK VOCCI, and LOUIS CANTILENA. "Intravenous Cocaine and QT Variability." Journal of Cardiovascular Electrophysiology 17, no. 6 (June 2006): 610–16. http://dx.doi.org/10.1111/j.1540-8167.2006.00421.x.
Повний текст джерелаBaumert, Mathias, Gavin W. Lambert, Tye Dawood, Elisabeth A. Lambert, Murray D. Esler, Mariee McGrane, David Barton, and Eugene Nalivaiko. "QT interval variability and cardiac norepinephrine spillover in patients with depression and panic disorder." American Journal of Physiology-Heart and Circulatory Physiology 295, no. 3 (September 2008): H962—H968. http://dx.doi.org/10.1152/ajpheart.00301.2008.
Повний текст джерелаYunisova, A. S., and A. V. Smolensky. "QT interval variability and athlete's heart remodeling." Clinical Medicine (Russian Journal) 100, no. 7-8 (October 31, 2022): 377–81. http://dx.doi.org/10.30629/0023-2149-2022-100-7-8-377-381.
Повний текст джерелаДисертації з теми "QT variability"
Schmidt, Martin, Mathias Baumert, Hagen Malberg, and Sebastian Zaunseder. "T Wave Amplitude Correction of QT Interval Variability for Improved Repolarization Lability Measurement." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-217300.
Повний текст джерелаLee, Shirleatha T. "The effects of glucose tolerance, hypertension, and race on heart rate variability, QT interval duration, and left ventricular hypertrophy in overweight-obese adolescents." View the abstract Download the full-text PDF version, 2009. http://etd.utmem.edu/ABSTRACTS/2009-005-Lee-index.htm.
Повний текст джерелаTitle from title page screen (viewed on August 27, 2009). Research advisor: Patricia A. Cowan, Ph.D. Document formatted into pages (x, 71). Vita. Abstract. Includes bibliographical references (p. 56-70).
Crotti, Lia. "An investigation of the clinical profile and extent of Long QT Syndrome (LQTS) associated with the KCNQ1-A341V mutation in South Africa and with the KCNH2-A1116V mutation in an Italian family and the role that autonomic nervous system (ANS) activity and genetics play in clinical variability." Thesis, Stellenbosch : University of Stellenbosch, 2007. http://hdl.handle.net/10019.1/1417.
Повний текст джерелаBackground Although great progress has been made in defining genes conferring the majority of genetic risk in Long QT Syndrome (LQTS) patients, there remains a substantial challenge to explain the widely observed variability in disease expression and phenotype severity, even among family members, sharing the same mutation. Identifying clinical and genetic variables capable of influencing/predicting the clinical phenotype of LQTS patients would allow a more accurate risk stratification, important for determining prognosis, selecting patients for the most appropriate therapy, and counseling asymptomatic mutation carriers (MCs). To address these questions an Italian LQT2 family and a South African Founder LQT1 population have been used. Methods and Results Italian LQT2 family. The proband, a 44-yr-old white woman, presented with ventricular fibrillation and cardiac arrest. Intermittent QT prolongation was subsequently observed and LQT2 was diagnosed following the identification of a missense KCNH2 mutation (A1116V). The proband also carried the common KCNH2 polymorphism K897T on the non-mutant allele. Relatives who carried A1116V without K897T were asymptomatic but some exhibited transient mild QTc prolongation suggesting latent disease. Expression studies in Chinese Hamster Ovary (CHO) cells, demonstrated that the presence of KCNH2-K897T is predicted to exaggerate the IKr reduction caused by the A1116V mutation. These data explain why symptomatic LQTS occurred only in the proband carrying both alleles. South African LQT1 population. The study population involved 320 subjects, 166 MCs and 154 non mutation carriers (NMCs). Off ß-blocker therapy, MCs had a wide range of QTc values (406-676 ms) and a QTc>500 ms was associated with increased risk for cardiac events (OR=4.22; 95%CI 1.12-15.80; p=0.033). We also found that MCs with a heart rate <73 bpm were at significantly lower risk (OR=0.23; 95%CI 0.06-0.86; p=0.035). In a subgroup of patients Baroreflex Sensitivity (BRS) was determined both in presence and absence of ß-blocker therapy. BRS, analyzed in subjects in the 2nd and 3rd age quartiles (age 26-47) to avoid the influence of age, was lower among asymptomatic than symptomatic MCs (11.8±3.5 vs 20.1±10.9 ms/mmHg, p<0.05). A BRS in the lower tertile carried a lower risk of cardiac events (OR 0.13, 95%CI 0.02-0.96; p<0.05). This study also unexpectedly determined that KCNQ1-A341V was associated with greater risk than that reported for large databases of LQT1 patients: A341V MCs were more symptomatic by age 40 (79% vs 30%) and became symptomatic earlier (7±4 vs 13±9 years), both p<0.001. Accordingly, functional studies of KCNQ1-A341V in CHO cells with KCNE1, identified a dominant negative effect of the mutation on wild-type channels. Conclusion Our findings indicate that risk stratification for LQTS patients must be more individually tailored and may have to take into account the specific mutation and probably additional clinical and genetic variables capable of influencing/predicting the clinical phenotype of LQTS patients. As a matter of fact, we have provided evidence that a common KCNH2 polymorphism may modify the clinical expression of a latent LQT2 mutation and the availability of an extended kindred with a common mutation allowed us to highlight that KCNQ1-A341V is associated with an unusually severe clinical phenotype and to identify two autonomic markers, HR and BRS, as novel risk factors.
Margara, Francesca. "Elucidating the phenotypic variability of a single cardiac sodium channel mutation: a multiscale computational approach." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15563/.
Повний текст джерелаMetzner, Sarah Maria [Verfasser], Karl Jürgen [Gutachter] Bär, Bernhard [Gutachter] Blanz, and Marcus-Willy [Gutachter] Agelink. "Untersuchungen der Herzratenvariabilität, der Baroreflexsensitivität und der QT-Intervall-Variabilität bei Angehörigen ersten Grades von Patienten mit Schizophrenie / Sarah Maria Metzner ; Gutachter: Karl Jürgen Bär, Bernhard Blanz, Marcus-Willy Agelink." Jena : Friedrich-Schiller-Universität Jena, 2009. http://d-nb.info/1178249131/34.
Повний текст джерелаJourdan, Géraldine. "Conséquences des altérations induites et spontanées du système nerveux autonome sur la fonction cardiovasculaire : approches physiologiques et pharmacologiques." Toulouse 3, 2008. http://thesesups.ups-tlse.fr/425/.
Повний текст джерелаOver the past 20 years numerous studies in humans have shown a significant relationship between alterations in the autonomic nervous system (ANS) and mortality. Although the nervous system is autonomous, it is a key physiopathological element in diseases and morbidity of the cardiovascular system. Some factors, directly or indirectly, linked to alterations of the ANS have thus been indentified and allow for a stratification of risk in terms of mortality. Our work, therefore, has consisted in examining the alterations of the ANS in vivo and investigating their consequences on the cardiovascular system in three distinct situations that reflect morbid affectations : the effect of aminochromes, oxidative derivatives of endogenous catecholamines, on the cardiovascular system of dogs and mice; the cardiovascular effect of a combination of two drugs in dogs; modifications in heart rate variability and ventricular repolarisation (study of the QT space) in a canine model of nutritional obesity. A primary study conducted with mice, clearly shows the existence of morbid cardiac modifications - electric and echocardiographic - specific to aminochromes. If these results are confirmed through clinical studies of plasmatic dosage of these compounds in humans, aminochromes per se could be used as a dedicated novel factor combining physiopathology and cardiovascular risk of mortality. A second investigation suggests that combined use of midodrine and dihydroergotamine in the treatment of severe orthostatic hypotension in humans must be avoided and confirms in dogs, the clinical observations of a worsening of this symptom when these two drugs are given in association. .
Schmidt, Martin, Marco Kircher, Alexander Noack, Hagen Malberg, and Sebastian Zaunseder. "Challenges to QT Interval Variability Analysis in Mobile Applications." 2015. https://tud.qucosa.de/id/qucosa%3A33162.
Повний текст джерелаRizkalla, Theodore Sami. "QT variability calculation using a template matching algorithm and power spectral analysis." Thesis, 2006. http://library1.njit.edu/etd/fromwebvoyage.cfm?id=njit-etd2006-014.
Повний текст джерелаNayyar, Sachin. "High density mapping of ventricular scar: insights into mechanisms of ventricular tachycardia." Thesis, 2014. http://hdl.handle.net/2440/93913.
Повний текст джерелаThesis (Ph.D.) -- University of Adelaide, School of Medicine, 2014
Abbushi, Oliver [Verfasser]. "Zirkardiane Variabilität der QT-Dispersion bei Gesunden und Herzkranken / vorgelegt von Oliver Abbushi." 2004. http://d-nb.info/973166487/34.
Повний текст джерелаЧастини книг з теми "QT variability"
Osterhues, Hans-H. "QT-Variability: Clinical Results and Prognostic Significance." In Advances in Noninvasive Electrocardiographic Monitoring Techniques, 143–53. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4090-4_13.
Повний текст джерелаMartynenko, A. V., N. Yabluchansky, A. Yabluchansky, B. Verheyden, F. Beckers, and A. E. Aubert. "Nonlinear Analysis of RR and QT Variability for Cosmonauts Data." In IFMBE Proceedings, 393–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23508-5_102.
Повний текст джерелаYabluchansky, N., A. V. Martynenko, A. Yabluchansky, B. Verheyden, F. Beckers, and A. E. Aubert. "Stability Analysis of RR and QT Variability for Cosmonauts Data." In IFMBE Proceedings, 412–14. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23508-5_107.
Повний текст джерелаCoumel, Philippe, and Pierre Maison-Blanche. "Heart rate variability and QT interval: their relationships with the cardiac frequency." In Cardiac Pacing and Electrophysiology, 63–72. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-0872-0_7.
Повний текст джерелаBaumert, M. "QT variability versus sympathetic cardiac activity in patients with major depression and patients with panic disorder." In IFMBE Proceedings, 1318–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03882-2_349.
Повний текст джерелаNegoescu, R. "Beat-by-Beat Variability of QT ECG-Interval Holds a Well-Founded Promise for Clinical Cardiology: A Review." In IFMBE Proceedings, 40–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22586-4_10.
Повний текст джерелаVrtovec, Bojan, and Gregor Poglaje. "QT Interval and QT Variability." In Advances in Electrocardiograms - Methods and Analysis. InTech, 2012. http://dx.doi.org/10.5772/21888.
Повний текст джерелаZareba, Wojciech, Iwona Cygankiewicz, and Antonio Bayes de Luna. "Q-T Interval, QT Dynamicity, and QT Variability." In Electrophysiological Disorders of the Heart, 945–56. Elsevier, 2012. http://dx.doi.org/10.1016/b978-1-4377-0285-9.00070-3.
Повний текст джерелаTereshchenko, Larisa G. "QT variability and QRST integral." In Sex and Cardiac Electrophysiology, 117–23. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-817728-0.00010-3.
Повний текст джерела"Beat-to-Beat QT Interval Variability and Autonomic Activity." In ECG Time Series Variability Analysis, 403–16. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.1201/9781315372921-21.
Повний текст джерелаТези доповідей конференцій з теми "QT variability"
De Maria, Beatrice, Gabriele Mora, Kalliopi Marinou, Riccardo Sideri, Vlasta Bari, Beatrice Cairo, Emanuele Vaini, Laura Adelaide Dalla Vecchia, and Alberto Porta. "QT Interval Variability and QT-HP Coupling Strength in Amyotrophic Lateral Sclerosis Patients." In 2020 Computing in Cardiology Conference. Computing in Cardiology, 2020. http://dx.doi.org/10.22489/cinc.2020.268.
Повний текст джерелаZaunseder, S., M. Schmidt, H. Malberg, and M. Baumert. "Measurement of QT variability by two-dimensional warping." In 2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO). IEEE, 2014. http://dx.doi.org/10.1109/esgco.2014.6847570.
Повний текст джерелаAlmeida, R., J. P. Martinez, A. P. Rocha, S. Olmos, and P. Laguna. "Improved QT variability quantification by multilead automatic delineation." In Computers in Cardiology, 2005. IEEE, 2005. http://dx.doi.org/10.1109/cic.2005.1588148.
Повний текст джерелаPorta, Alberto, Vlasta Bari, Andrea Marchi, Beatrice De Maria, and Sergio Cerutti. "Wiener-Granger causality in QT-HP variability interactions." In 2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2015. http://dx.doi.org/10.1109/embc.2015.7318724.
Повний текст джерелаKarjalainen, P. A., M. P. Tarvainen, and T. Laitinen. "Principal Component Regression Approach for QT Variability Estimation." In 2005 IEEE Engineering in Medicine and Biology 27th Annual Conference. IEEE, 2005. http://dx.doi.org/10.1109/iembs.2005.1616624.
Повний текст джерелаPorta, A., E. Tobaldini, V. Magagnin, T. Bassani, T. Gnecchi-Ruscone, and N. Montano. "Open loop linear parametric modeling of the qt variability." In 2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2009. http://dx.doi.org/10.1109/iembs.2009.5333541.
Повний текст джерелаNguyen, LinhLan, Steven Su, and Hung T. Nguyen. "Effects of hyperglycemia on variability of RR, QT and corrected QT intervals in Type 1 diabetic patients." In 2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2013. http://dx.doi.org/10.1109/embc.2013.6609876.
Повний текст джерелаKhandoker, Ahsan, Veena Luthra, Yousef Abouallaban, Muhammad Hasan, Nayeefa Chowdhury, and Herbert Jelinek. "Reduced QT Variability and increased QT/RR slope in ECG signals of Depressed Patients with Suicidal Ideation." In 2016 Computing in Cardiology Conference. Computing in Cardiology, 2016. http://dx.doi.org/10.22489/cinc.2016.114-190.
Повний текст джерелаCuomo, S., M. A. Ribani, F. Marciano, M. L. Migaux, P. Cortelli, G. Pierangeli, P. E. Russo, A. D'Andrea, and R. Calabro. "Abnormal QT interval variability in patients with multiple system atrophy." In Computers in Cardiology, 2005. IEEE, 2005. http://dx.doi.org/10.1109/cic.2005.1588143.
Повний текст джерелаOrini, Michele, Peter Taggart, and Pier D. Lambiase. "A multivariate time-frequency approach for tracking QT variability changes unrelated to heart rate variability." In 2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2016. http://dx.doi.org/10.1109/embc.2016.7590852.
Повний текст джерела