AIM To reassess QT interval rate correction. BACKGROUND The QT interval is strongly and inversely related to heart rate. To compare QT intervals between different subjects with different heart rates requires the application of a QT interval rate correction formula. To date these formulae have inappropriately assumed a fixed relation between QT interval and heart rate. An alternative method of...

sudden, unexpected death may occur in apparently healthy individuals. its occurrence in psychiatric patients has raised the concern that the use of psychotropics, especially antipsychotics, may be associated with an increased risk of sudden death. this concern is maintained even though not all psychiatric patients who have succumbed to sudden death have been on psychotropics. early reports pres...

We study the homogeneous Dirichlet problem for degenerate parabolic equationut?div(|?u|p(x,t)?2?u)=f(x,t) in QT=?×(0,T), where ??RN, N?2, is a bounded domain with boundary ???C2. The variable exponent p(x,t) given Lipschitz-continuous function, p(x,t):QT?[p?,p+] some constants 2NN+2<p??p+<?. derive conditions on f and u0 sufficient existence of unique strong solution following global regularity...

torsades de pointes is a rare but potentially lethal arrhythmia which mainly occurs in the setting of a prolonged qt interval. ecg is a reliable tool to detect such abnormalities, routinely taken from all patients over 40 who undergo surgery. we describe the case of a 35-year-old woman with torsades de points arrhythmia after hysterectomy surgery. most likely, our patients had long qt syndrome ...

Data of a large clinical study were used to investigate how much are the QT/RR patterns in healthy subjects curved and whether these curvatures differ between women and men. Daytime drug-free 12-lead Holter recordings were repeated 4 times in each of 176 female healthy subjects and 176 male healthy subjects aged 32.7 ± 9.1 yr. In each of the subjects, up to 1,440 carefully verified QT interval ...