Results 81 to 90 of about 29,656 (290)

Sleep-Disordered Breathing Destabilizes Ventricular Repolarization

, 2023
Sleep-disordered breathing (SDB) increases the risk of cardiac arrhythmias, sudden death, and all-cause mortality. To characterize the associations between SDB, intermittent hypoxemia, and the QT variability index (QTVI), a measure of ventricular ...
Siddharthan, Trishul, Solhjoo, Soroosh, Haigney, Mark C, Punjabi, Naresh M, Koch, Abigail   +4 more
core   +1 more source

Cardiovascular regulation and vascular structure in prehypertension and coronary heart disease

, 2009
The aim of this thesis was to characterize vascular structure and different aspects of cardiovascular regulation in otherwise healthy subjects with slightly elevated blood pressure and compare to healthy subjects with normotension and also investigate ...
Myredal, Anna
core  

Utilization and Prognosis of Cardiac Device Implantation in AL Versus ATTR Amyloidosis

Pacing and Clinical Electrophysiology, EarlyView.
ABSTRACT Introduction Cardiac amyloidosis can cause congestive heart failure, arrhythmias, and heart blocks, which frequently require cardiac device implantation (CDI). However, the differences between light chain (AL) amyloidosis and transthyretin (ATTR) amyloidosis CDI requirements are unknown. Methods A retrospective analysis was conducted using the
Bilal Hussain, Sanchit Duhan, Khawaja Hassan Akhtar, Amith Reddy Seri, Krittapoom Akrawinthawong, Janardhana Gorthi, Bijeta Keisham, Tarun Dasari   +7 more
wiley   +1 more source

Mitochondrial Ca2+ Influx Contributes to Arrhythmic Risk in Nonischemic Cardiomyopathy

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2018
BackgroundHeart failure (HF) is associated with increased arrhythmia risk and triggered activity. Abnormal Ca2+ handling is thought to underlie triggered activity, and mitochondria participate in Ca2+ homeostasis.
An Xie, Zhen Song, Hong Liu, Anyu Zhou, Guangbin Shi, Qiongying Wang, Lianzhi Gu, Man Liu, Lai‐Hua Xie, Zhilin Qu, Samuel C. Dudley   +10 more
doaj   +1 more source

QT Interval Evaluation in Right Ventricular Pacing: Validation of a Novel Formula

Pacing and Clinical Electrophysiology, EarlyView.
Abstract Background QT interval measurement in the presence of right ventricular pacing (RVP) represents a clinical challenge. We therefore aimed to derive and validate a formula for QT estimation during RVP in a large cohort of pacemaker patients. Methods and Results We prospectively enrolled 100 patients in a derivation cohort and 487 in a validation
Amr Abdin, Alhasan Almasri, Ibrahim Antoun, Charles Gieres, Christian Werner, Yvonne Bewarder, Christian Ukena, Igor Schwantke, Michael Böhm, Saarraaken Kulenthiran   +9 more
wiley   +1 more source

Evaluation of Tp-e interval and Tp-e/QT ratio in patients with rheumatoid arthritis

Türk Kardiyoloji Derneği Arşivi, 2014
Objective: Several studies have suggested that the interval from the peak to the end of the electrocardiographic T wave (Tp-e) may correspond to the transmural dispersion of repolarization and that inreased Tp-e interval and Tp-e/QT ratio are associated
Gurkan Acar, Murat Akkoyun, Alper Buğra Nacar, İmran Dirnak, Gözde Yıldırım Çetin, Makbule Nur Yıldırım, Cemil Zencir, Kayıhan Karaman, Mustafa Çetin, Mehmet Sayarlıoğlu   +9 more
doaj   +1 more source

Dispersion of ventricular repolarization and arrhythmia: study of two consecutive ventricular premature complexes.

, 1985
The effect of two consecutive ventricular premature stimuli (S1S2) during atrial pacing on dispersion of repolarization and inducibility of ventricular arrhythmias was studied in 16 dogs under control conditions and in four dogs in the presence of an ...
H Atarashi, C S Kuo, C P Reddy, B Surawicz   +3 more
core   +1 more source

Left Bundle Branch Area Pacing Reverts Electromechanical Window Negativity to a Similar Extent as Biventricular Pacing

Pacing and Clinical Electrophysiology, EarlyView.
BiVP = biventricular pacing; CRT = cardiac resynchronization therapy; EMW = electromechanical window; LBBAP = left bundle branch area pacing; QAoC = Time interval from the onset of the QRS complex to the center of the aortic valve closure artifact; QT = QT interval measured by tangent method.
Florien Klein, Metra Daliry, Karin C. Smits, Edoardo Bressi, Peter M. Deissler, Johan van Koll, Jesse H. J. Rijks, Antonius M. W. van Stipdonk, Rachel M. A. ter Bekke, Domenico Grieco, Chiara Manfuro, Giorgia Spiridigliozzi, Annalisa Casalese, Justin G. L. M. Luermans, Frits W. Prinzen, Roel Meiburg, Leonard M. Rademakers, Kevin Vernooy, Uyên Châu Nguyên   +18 more
wiley   +1 more source

Association between ventricular repolarization parameters and cardiovascular death in patients of the SWISS-AF cohort.

, 2022
BACKGROUND The effect of the ventricular repolarization heterogeneity has not been systematically assessed in patients with atrial fibrillation (AF).
Mainardi, Luca, Osswald, Stefan, Sassi, Roberto, Rodondi, Nicolas, Mainardi, Luca T, Schlageter, Vincent, Conen, David, Corino, Valentina D A, Reichlin, Tobias, Auricchio, Angelo, Zuern, Christine S, Aeschbacher, Stefanie, Kühne, Michael, Moschovitis, Giorgio, Roten, Laurent, Conte, Giulio, Laureanti, Rita, Rivolta, Massimo W   +17 more
core   +1 more source

The isolated working guinea pig heart: A functional and electrophysiological characterisation

Experimental Physiology, EarlyView.
Abstract Small animal isolated perfused hearts have been used for over 150 years for the study of cardiac physiology and pharmacology. The guinea pig heart represents the smallest mammalian heart that replicates key features of the human heart – for example, with respect to cardiac action potential duration, ion channel expression, excitation ...
Grace C. Anderson‐Barker, Michael J Shattock   +1 more
wiley   +1 more source