Objectives: We attempted to determine the correlation between the presence of
postextrasystolic changes in the STU segment and a history of sustained ventricular …

Postextrasystolic U wave augmentation is observed in patients with long QT syndrome and
those with organic heart disease. This phenomenon is considered a marker of increased risk …

OBJECTIVES The purpose of this study was to investigate the electrophysiologic
mechanism (s) that underlie the transition of one or more short–long (SL) cardiac sequences …

Objectives: This study sought to identify electrocardiographic (ECG) criteria that are
associated with initiation of torsades de pointes (TdP) in patients with acquired (a-) and …

OBjectives. We evaluated the diagnostic prognostic value of morphologic abnormalities of
the T wave (mainly notched or biphasic T waves) in patients affected by the idiopathic long …

Ratio of Late to Early T-Wave Peak Amplitude in 24-h Electrocardiographic Recordings as
Indicator of Symptom History in Patients with Long-QT Syndrome Types 1 and 2 Matti …

Background In patients with the long QT syndrome (LQTS), a sudden increase in heart rate
can cause T-wave alternans (TWA) with beat-to-beat alternating polarity of T wave. We …

Objectives. This study attempted to determine the prevalence and electrocardiographic
(ECG) lead distribution of T wave “humps”(T2, after an initial T wave peak, T1) among …

BACKGROUND: Short QT syndrome (SQTS) is characterized by an abnormally short QT
interval and sudden death. Due to the limited number of cases, the characteristics of SQTS …

BACKGROUND: LQTS may cause sudden cardiac death (SCD), but the mechanisms linking
gene mutations to ventricular fibrillation (VF) are unclear. OBJECTIVE: To determine …