Results 51 to 60 of about 307,662 (147)

QRS fragmentation and pacing mode

Κατακερματισμένο QRS σύμπλεγμα και καρδιακή βηματοδότηση Ιστορικό: Η μελέτη σχεδιάστηκε για να διερευνήσει την επίδραση του καρδιακού ρυθμού και του τρόπου βηματοδότησης στον κατακερματισμό του QRS (f-QRS).
Δεσποτόπουλος, Στέφανος
core   +2 more sources

Predicting adverse cardiovascular outcomes in post‐coronary artery bypass grafting patients using novel ECG frequency analysis of the QRS complex

Annals of Noninvasive Electrocardiology, 2021
Background A novel metric called Layered Symbolic Decomposition frequency (LSDf) has been shown to be an independent predictor of ventricular arrhythmia and mortality in patients receiving implantable cardioverter‐defibrillator (ICD) devices.
Thalia Hua, Alexandra Vlahos, Mohammad Hassan Shariat, Darrin Payne, Damian Redfearn   +4 more
doaj   +1 more source

Terminal S Wave Pattern in Lead V3 as a Simple Marker for Ventricular Tachycardia Risk Stratification in Patients With Repaired Tetralogy of Fallot

Journal of Cardiovascular Electrophysiology, EarlyView.
ABSTRACT Introduction Patients with repaired tetralogy of Fallot (rTOF) remain at risk of ventricular tachycardia (VT). This risk is most commonly related to slow conduction within the septal isthmus, which is defined as the region between the ventricular septal defect (VSD) patch and adjacent valvular annuli.
Yuki Matsuoka, Miyako Igarashi, Naoto Kawamatsu, Yuto Iioka, Yoshihiro Harano, Yuki Komatsu, Tomoko Machino‐Ohtsuka, Hiro Yamasaki, Tomoko Ishizu   +8 more
wiley   +1 more source

Relationship of QRS Fragmentation and Coronary Arterial Lesion Severity Assessed with Syntax Scores in Acute Coronary Syndrome Patients in Adam Malik Haji Hospital

, 2022
: Almost half of the causes of cardiovascular death are the result of Acute Myocardial Infarction (AMI). Acute coronary syndrome (ACS) consisting of unstable angina pectoris (APTS), non-ST elevation acute myocardial infarction (IMANEST) and ST elevation ...
Mega Almira, Hilfan Ade Putra Lubis, Teuku Bob Haykal, Andre Pasha Ketaren, Anggia Chairuddin Lubis, Harris Hassan   +5 more
core   +1 more source

Profiling the sleep architecture of ageing adults using a seven‐state continuous‐time Markov model

Journal of Sleep Research, Volume 34, Issue 2, April 2025.
Summary Sleep is a complex biological process regulated by networks of neurons and environmental factors. As one falls asleep, neurotransmitters from sleep–wake regulating neurones work in synergy to control the switching of different sleep states throughout the night. As sleep disorders or underlying neuropathology can manifest as irregular switching,
Jonathon Jacobs, Caitlin E. Martin, Bernard Fuemmeler, Shanshan Chen   +3 more
wiley   +1 more source

QRS fragmentation: Diagnostic and prognostic significance [PDF]

, 2012
Fragmentation of QRS (fQRS) complex is an easily evaluated non-invasive electrocardiographic parameter. Fragmentation of narrow QRS is defined as presence of an additional R wave (R′) or notching in the nadir of the S wave, or the presence of > 1 R&
Zaręba, Wojciech, Pietrasik, Grzegorz
core  

Diffuse Fragmented QRS as an Index of Extensive Myocardial Scar

Indian Pacing and Electrophysiology Journal, 2010
A 70-year-old man with history of previous myocardial infarction was referred for cardiac resynchronization therapy (CRT) implantation. Echocardiography showed global wall motion abnormality and non-viable myocardium with ejection fraction of 15% and ...
Amir Aslani, Amir Tavoosi, Zahra Emkanjoo   +2 more
doaj  

Cellular mechanisms of radiation‐induced myocyte dysfunction: effects on calcium handling, ion channel regulation and mitochondrial energetics

The Journal of Physiology, EarlyView.
Abstract figure legend Dose‐dependent effects of radiation on cardiac electrophysiology and arrhythmia susceptibility. At low radiation doses (left), increased reactive oxygen species (ROS) initiate an ROS–Ca2+ positive feedback loop involving calcium/calmodulin‐dependent protein kinase II (CaMKII) activation, enhanced L‐type Ca2+ current (ICaL ...
Hannah M. Zukowski, Colleen E. Clancy
wiley   +1 more source

Quantification of abnormal QRS peaks predicts response to cardiac resynchronization therapy and tracks structural remodeling.

PLoS ONE, 2019
BackgroundAlthough QRS duration (QRSd) is an important determinant of cardiac resynchronization therapy (CRT) response, non-responder rates remain high. QRS fragmentation can also reflect electrical dyssynchrony.
Adrian M Suszko, Sachin Nayyar, Andreu Porta-Sanchez, Moloy Das, Arnold Pinter, Eugene Crystal, George Tomlinson, Rupin Dalvi, Vijay S Chauhan   +8 more
doaj   +1 more source

Effectiveness of Bachmann's Bundle Pacing in a Patient With Severe Heart Failure and Refractory Atrial Fibrillation

Journal of Arrhythmia, Volume 42, Issue 5, October 2026.
This case report highlights CRT‐D with Bachmann's bundle pacing (BBP) in a patient with severe heart failure and refractory atrial fibrillation. BBP preserved atrioventricular conduction without PR prolongation, maintained left ventricular–only pacing, and was associated with suppression of atrial fibrillation and improvement in left atrial contractile
Yosuke Murase, Yasuhiro Ogawa, Hajime Imai, Keita Mamiya, Katsuhiro Kawaguchi   +4 more
wiley   +1 more source