Spotlights on some electrocardiographic paradigms: How should we evaluate normal reference values of Tp–Te interval, Tp–Te dispersion and Tp–Te/QT ratio?

The Effects of Metabolic Syndrome on TpTe Interval and TpTe/QT Ratio in Patients with Normal Coronary Arteries.

OBJECTIVE T wave peak to T wave end (TpTe) interval and TpTe/QT have been accepted as predictors of ventricular arrythmia. In this study our aim is to investigate the effect of metabolic syndome on these parameters in patients with angiographically normal coronary arteries. MATERIALS AND METHODS Thirty patients with metabolic syndrome (4 male, mean age 52±7.8 years) and twenty patients withou...

Predicted values: how should we use them?

Carbon monoxide poisoning increases Tpeak–Tend dispersion and QTc dispersion

OBJECTIVES Carbon monoxide (CO) poisoning leads to cardiac dysrhythmia. Increased heterogeneity in ventricular repolarisation on electrocardiogram (ECG) shows an increased risk of arrhythmia. A number of parameters are used to evaluate ventricular repolarisation heterogeneity on ECG. The aim of our study is to investigate the effect of acute CO poisoning on indirect parameters of ventricular re...

Diastolic electromechanical coupling: association of the ECG T-peak to T-end interval with echocardiographic markers of diastolic dysfunction.

BACKGROUND Electromechanical coupling, a well-described phenomenon in systolic dysfunction, has not been well studied in diastole. We hypothesized that the ECG T-peak to T-end (TpTe) interval, representing transmural dispersion of repolarization, is associated with echocardiographic markers of diastolic dysfunction (DD). METHODS AND RESULTS We performed a prospective, cross-sectional study of...

How should we evaluate an open artery in STEMI patients?

Acute ST-elevation myocardial infarction (STEMI) is a major cause of mortality and morbidity. After plaque rupture and intracoronary thrombus formation, ischaemia causes damage to myocytes and coronary microcirculation soon after occlusion. In the 1980s, mortality reduction with thrombolytic therapy generated a new standard of care for medical treatment of patients with STEMI. However, fibrinol...