Results 11 to 20 of about 1,220,201 (270)

QRS fragmentation is superior to QRS duration in predicting mortality in adults with tetralogy of Fallot [PDF]

Heart, 2016
Background Although QRS duration >180 ms has prognostic value in adults with tetralogy of Fallot (TOF), its sensitivity to predict mortality is low. Fragmented QRS complexes, a simple measurement on ECG, are related to myocardial fibrosis and dysfunction in patients with TOF.
Jouke P Bokma, Michiel M Winter, Jim T Vehmeijer, Hubert W Vliegen, Arie P van Dijk, Joost P van Melle, Folkert J Meijboom, Martijn C Post, Aeilko H Zwinderman, Barbara J M Mulder, Berto J Bouma   +10 more
core   +8 more sources

Effect of acute ventricular pressure changes on QRS duration

Journal of Electrocardiology, 1994
The effect of acute changes in ventricular pressure is examined on the QRS duration to clarify the mechanism of ventricular pressure-related arrhythmogenesis. Ventricular pressure was changed acutely by arterial transfusion-bleeding into an open-air ventricular pressure reservoir that was either off or on a metaraminol intravenous drip.
SIDERIS, DA, TOUMANIDIS, ST, KOSTOPOULOS, K, PITTARAS, A, SPYROPOULOS, GS, KOSTIS, EB, MOULOPOULOS, SD   +6 more
core   +6 more sources

Comparison of QRS duration in African blacks and European caucasians [PDF]

, 2010
This study aimed to compare the QRS duration in a large population of healthy individuals living in Nigeria with a Caucasian population living in Scotland.
Katibi, I., Devine, B., Lloyd, S., Clark, E., Macfarlane, P.W.   +4 more
core   +8 more sources

Prognostic significance of QRS duration and morphology. [PDF]

Cardiology journal, 2011
QRS duration and morphology, evaluated via a standard 12-lead electrocardiogram (ECG), represent an opportunity to derive useful prognostic information regarding the risk of subsequent cardiac events or therapeutic outcomes. Prolonged QRS duration, and the presence of intraventricular conduction abnormalities, usually indicate the presence of changes ...
Andrew, Brenyo, Wojciech, Zaręba
openaire   +2 more sources

Maximizing QRS duration reduction in contemporary cardiac resynchronization therapy is feasible and shorter QRS duration is associated with better clinical outcome. [PDF]

J Interv Card Electrophysiol, 2023
Background We aimed to evaluate if optimization by maximizing QRS duration (QRSd) reduction is feasible in an all-comer cardiac resynchronization therapy (CRT) population, and if reduced, QRSd is associated with a better clinical outcome.
Borgquist R, Marinko S, Platonov PG, Wang L, Chaudhry U, Brandt J, Mörtsell D.   +6 more
europepmc   +2 more sources

Predictive value of QRS complex duration in patients with chronic heart failure and atrial fibrillation: retrospective study [PDF]

Терапевтический архив, 2022
Aim. To study of the features of the clinical course and prognosis in patients with chronic heart failure with low ejection fraction (HFrEF) and atrial fibrillation (AF) depending on the width of the QRS complex. Materials and methods.
Tatiana M. Uskach, Yulduz Sh. Sharapova, Alfiya A. Safiullina, Ekaterina V. Zinovyeva, Sergey N. Tereshchenko   +4 more
doaj   +1 more source

Subtle QRS changes are associated with reduced ejection fraction, diastolic dysfunction, and heart failure development and therapy responsiveness: Applications for artificial intelligence to ECG

Annals of Noninvasive Electrocardiology, 2022
Background Since the last century, the electrocardiogram (ECG) remains the non‐invasive test, that is, most easily accessible, feasible, and inexpensive for cardiology assessment.
Artemio García‐Escobar, Silvio Vera‐Vera, Alfonso Jurado‐Román, Santiago Jiménez‐Valero, Guillermo Galeote, Raúl Moreno   +5 more
doaj   +1 more source

The variability of automated QRS duration measurement [PDF]

Europace, 2016
Previous studies have demonstrated substantial variability in manual assessment of QRS complex duration (QRSd). Disagreements in QRSd measurements were also found in several automated algorithms tested on digitized electrocardiogram (ECG) recordings. The aim of our study was to investigate the variability of automated QRSd measurements performed by two
Vlastimil, Vancura, Dan, Wichterle, Ivan, Ulc, Jirí, Šmíd, Marek, Brabec, Marta, Zárybnická, Richard, Rokyta   +6 more
openaire   +2 more sources

Race and Sex Differences in QRS Interval and Associated Outcome Among Patients with Left Ventricular Systolic Dysfunction

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2017
Background Prolonged QRS duration is associated with increased mortality among heart failure patients, but race or sex differences in QRS duration and associated effect on outcomes are unknown.
Tiffany C. Randolph, Samuel Broderick, Linda K. Shaw, Karen Chiswell, Robert J. Mentz, Valentina Kutyifa, Eric J. Velazquez, Francis R. Gilliam, Kevin L. Thomas   +8 more
doaj   +1 more source

Integration of genetics into a systems model of electrocardiographic traits using humanCVD BeadChip [PDF]

, 2012
<p>Background—Electrocardiographic traits are important, substantially heritable determinants of risk of arrhythmias and sudden cardiac death.</p> <p>Methods and Results—In this study, 3 population-based cohorts (n=10 526) genotyped ...
Nelson, C.P., Whittaker, John, Kumari, Meena, Folkersen, Lasse, Lasse Folkersen, Drenos, F., Drenos, Fotios, Kumari, M., Nelson, Christopher P, Amuzu, A., Mika Kivimaki, Nilesh J. Samani, Braund, P.S., Folkersen, L., Whittaker, J., Juan-Pablo Casas, John Whittaker, Eriksson, Per, Burton, P.R., Christopher P. Nelson, Meena Kumari, Zhang, H., Tom R. Gaunt, Debbie A. Lawlor, Casas, J.-P., Peter S. Braund, Adeniran, Ismail, Samani, Nilesh J, Sonia Shah, Samani, N.J., Antoinette Amuzu, Amuzu, Antoinette, Humphries, S.E., Zhang, Henggui, Henggui Zhang, Philippa J. Talmud, Day, I.N.M., Hancox, Jules C, Hancox, J.C., Tomaszewski, M., Hingorani, Aroon D, Burton, Paul R, Maciej Tomaszewski, Lawlor, D.A., Jules C. Hancox, Ian N.M. Day, Steve E. Humphries, Kivimaki, Mika, Kivimaki, M., Tobin, Martin D, Lawlor, Debbie A, Hingorani, A.D., Per Eriksson, Eriksson, P., Tomaszewski, Maciej, Peter W. Macfarlane, Humphries, Steve E, Shah, S., Ismail Adeniran, Day, Ian NM, Macfarlane, P.W., Martin D. Tobin, Paul R. Burton, Day, Ian N M, Gaunt, Tom R, Macfarlane, Peter W, Adeniran, I., Fotios Drenos, Shah, Sonia, Talmud, Philippa J, Gaunt, T.R., Tobin, M.D., Casas, Juan-Pablo, Talmud, P.J., Braund, Peter S, Tomaszewski, Maciej; id_orcid, Aroon D. Hingorani, Nelson, CP, Tobin, M., Hancox, Jules C., Casas, J-P, Shah, S, Casas, J., Drenos, F, Folkersen, L, Samani, Nilesh J., Burton, Paul R., Nelson, C., Hancox, J., Talmud, Philippa J., Macfarlane, Peter W., Gaunt, TR, Braund, P., Lawlor, D., Lawlor, DA, Gaunt, T., Burton, P., et al., Braund, Peter S., Day, Ian N.M., Adeniran, I, Tobin, Martin D., Humphries, S., Talmud, P., Lawlor, Debbie A., Amuzu, A, Braund, PS, Hingorani, Aroon D., Humphries, Steve E.   +108 more
core   +1 more source