Results 61 to 70 of about 2,100,203 (396)

Dynamics of QT Interval in a Patient With Long QT Syndrome and a Normal QT Interval

Japanese Circulation Journal, 1998
A case report of a 15-year-old girl who experienced syncope and torsades de pointes is presented. The girl had a normal QT interval (QTc=0.37 sec) on the resting electrocardiogram (ECG). Infusion of isoproterenol induced QT prolongation (QTc=0.62 sec) and frequent occurrence of multiform ventricular premature beats. Her Holter ECG showed a prolongation
Morio Ito, Mikiko Nakagawa, Tetsu Iwao, Shuji Ishida, Midori Asada, Susumu Shimada, Hidetoshi Yonemochi, Tetsunori Saikawa, Naohiko Takahashi   +8 more
openaire   +4 more sources

Automated versus Manual Measurement of the QT Interval and Corrected QT Interval [PDF]

Annals of Noninvasive Electrocardiology, 2011
Background: The International Conference on Harmonization E14 Guideline specifies detailed assessment of QT interval or corrected QT interval prolongation when developing new drugs. We recently devised new software to precisely measure the QT interval.
Masakatsu Ohta, Atsushi Hirayama, Yuji Kasamaki, Akira Sezai, Mutsuo Kaneko, B A Takashi Yamaki, Yukio Ozawa, Ichiro Watanabe, Tomohiro Nakayama   +8 more
openaire   +3 more sources

Drug-induced QT interval prolongation and torsades de pointes

Canadian Pharmacists Journal / Revue des Pharmaciens du Canada, 2016
Torsades de pointes (TdP) is a life-threatening arrhythmia associated with prolongation of the corrected QT (QTc) interval on the electrocardiogram.
J. Tisdale
semanticscholar   +1 more source

Диспластические синдромы и фенотипы в оценке изменений интервала QT при малых аномалиях сердца

Архивъ внутренней медицины, 2011
To assess relation of dysplastic syndromes and phenotypes to pathological QT interval in patients with minor cardiac anomalies, 128 patients aged 18–35 years were examined.
А. В. Ягода, Н. Н. Гладких, Я. С. Григорян   +2 more
doaj   +3 more sources

QT Interval Revisited —Not Just the Matter of “Interval,” but “Dynamics, Variability and Morphology” Matter!—

Journal of Arrhythmia, 2007
Recently, the effects of QT interval prolongation have received more attention among clinicians, industry, and official regulatory agencies. Some have advocated the total elimination or discontinuing development of drugs which prolong the QT interval. In
Tetsunori Saikawa, MD, Mikiko Nakagawa, MD, Naohiko Takahashi, MD   +2 more
doaj   +1 more source

Prevalence of QTc interval prolongation and its associated risk factors among psychiatric patients: a prospective observational study

BMC Psychiatry, 2020
Background QT interval prolongation is a growing concern worldwide, posing psychiatric patients to life-threatening fatal arrhythmias i.e., torsade de pointes.
Zahid Ali, Mohammad Ismail, Zahid Nazar, Fahadullah Khan, Qasim Khan, Sidra Noor   +5 more
doaj   +1 more source

Thoracic epidural analgesia prolongs postoperative QT interval on electrocardiogram in major non-cardiac surgery: a randomized comparison and a prospective cohort analysis

Frontiers in Pharmacology, 2023
Introduction: Prolongation of QT interval on electrocardiogram can be associated with perioperative lethal arrhythmia. Epidural analgesia is a commonly used modality to relieve surgical pain by blocking sensory nerves, which also blocks the autonomic ...
Kotaro Hori, Shogo Tsujikawa, Mika Egami, Sayaka Waki, Ryota Watanabe, Hideki Hino, Tadashi Matsuura, Takashi Mori   +7 more
doaj   +1 more source

The effect of varenicline on Tp-e interval, Tp-e/QT ratio and Tp-e/QTc ratio in healthy smokers and nonsmokers [PDF]

, 2015
Background: Varenicline could affect the T wave and QT interval. The interval from the peak to the end of the electrocardiographic (ECG) T wave (Tp-e) may correspond to the transmural dispersion of repolarization, and increased Tp-e interval and Tp-e/QT ...
Aktaş, İbrahim, Arı, Hasan, Arı, Selma, Camcı, Sencer, Celiloğlu, Nuran, Coşar, Selvi, Doğanay, Kübra, Melek, Mehmet, Tütüncü, Ahmet   +8 more
core   +2 more sources

Prevalence and risk factors for prolonged QT interval and QT dispersion in patients with type 2 diabetes

Acta Diabetologica, 2016
AimsProlonged QT interval is associated with cardiac arrhythmias and sudden death. The present study determined the prevalence of prolonged QT interval and QT dispersion and defined their clinical and metabolic predictors in patients with type 2 diabetes.
V. Ninkovic, S. Ninkovic, V. Miloradovic, Dejan Stanojević, Marijana Babic, V. Giga, M. Dobric, M. Trenell, N. Lalic, P. Seferovic, D. Jakovljevic   +10 more
semanticscholar   +1 more source

The effects of peritoneal dialysis on QT interval in ESRD patients

BMC Nephrology, 2022
Background Patients with chronic kidney disease (CKD) are at a high risk of fatal arrhythmias. The extended corrected QT (QTc) interval is a hallmark of ventricular arrhythmias and sudden cardiac death.
Wenjing Zhang, Yu Liang, Jia Lv, Yan Li, Jiping Sun   +4 more
doaj   +1 more source