Errors in manual measurement of QT intervals.

Errors in manual measurement of QT intervals.

OBJECTIVE To quantify the errors associated with manual measurement of QT intervals and to determine the source of the errors. DESIGN A randomised study of QT measurement by four cardiologists of electrocardiograms plotted on paper in presentations with different noise levels, paper speeds, amplifier gains, and with and without a second QRST complex to indicate the RR interval. SUBJECTS Fou...

Measurement and interpretation of electrocardiographic QT intervals in murine hearts

Alterations in ECG QT intervals correlate with the risk of potentially fatal arrhythmias, for which transgenic murine hearts are becoming increasingly useful experimental models. However, QT intervals are poorly defined in murine ECGs. As a consequence, several different techniques have been used to measure murine QT intervals. The present work develops a consistent measure of the murine QT int...

collocation errors in translations of the holy quran

the present study aims at identifying, classifying and analyzing collocation errors made by translators of the holy quran into english.findings indicated that collocationally the most acceptablt translation was done by ivring but the least appropriate one made by pickthall.

Measurement and interpretation of electrocardiographic QT intervals in 1 murine hearts

15 Alterations in ECG QT intervals correlate with the risk of potentially fatal arrhythmias, for which 16 transgenic murine hearts are becoming increasingly useful experimental models. However, QT 17 intervals are poorly defined in murine ECGs. As a consequence, several different techniques have 18 been used to measure murine QT intervals. The present work develops a consistent measure of murin...

Measurement of QT dispersion.