Corrected QT interval (QTc): The QT interval has an inverse relationship with heart rate. The QTc is the QT interval corrected for heart rate, and it estimates the QT interval at a heart rate of 60 beats/min. See formulas. Prolonged QTc is generally defined as >450 ms for adult males ...
The effects of HD on QT interval were greater in women than in men and a significant correlation was found between QTc changes during HD and Ca variations (R=0.34; p<0.01). Thus, patients requiring HD may have a reduced cardiac electrical stability that may predispose to ventricular ...
The 95% upper confidence limit for the mean 24-h QTc interval was 452 ms (men 439 ms, women 461 ms). The RR, QT and QTc intervals and the high frequency component of heart rate variability were greater during sleep. Both the QTc interval and the variability between hourly minimal and ...
QT c interval and resting heart rate as long-term predictors of mortality in type 1 and type 2 diabetes mellitus: a 23-year follow-up et al (2007) QTc interval and resting heart rate as long-term predictors of mortality in type 1 and type 2 diabetes mellitus: a 23-year follow-up.....
Torsades de Pointes (TdP) is a malignant polymorphic ventricular tachycardia with heart rate corrected QT interval (QTc) prolongation, which may be attributed to congenital and acquired factors. Although various acquired factors for TdP have been summarized, levosimendan administration in complex postoperat...
The rate-corrected electrocardiographic QT (QTc) interval may significantly increase in patients with schizophrenia taking antipsychotics. The objective of this naturalistic study was to assess the prevalence of prolonged QTc interval in a large population of inpatients with chronic schizophrenia and to exp...
Is a single measurement of QT/QTc interval enough to perform risk stratification and therapeutic decisions in a patient with long QT synd... QTc variability. Is a single measurement of QT/QTc interval enough to perform risk stratification and therapeutic decisions in a patient with long QT ......
QTc - 618 ms, medium QTc - 538 ms with different morphology types of T wave. Beta-blocker (BB) therapy (metoprolol was initiated) and titrated up to 200 mg daily. The patient was out of symptoms. After 2 years during the second pregnancy she reduced BB to 50 mg/day. In the post...
Her mother was healthy and had a QTC on ECG of 460 ms, but the patient’s maternal aunt had died suddenly at five months postpartum. A normal QTC interval for a female is 450 or less and 440 or less for a male. The diagnosis of LQTS was made, and the patient received an ...
The past several years have witnessed a series of regulatory initiatives aimed at providing guidance on the assessment of QT/QTc interval prolongation liability during drug development:1. CPMP Points to Consider: The Assessment of the Potential for QT Interval Prolongation by Non-cardiovascular ...