Bad Day at Black Rock is a suspenseful, mature, masculine movie (something Hollywood does not really produce anymore) laden with talented actors and patriotic veterans. Tracy plays a man who served our country in WW 2, while Ryan, Marvin, and Borgnine actually did.
This correction formula is usually programmed into the machine that measures your ECG and the corrected QT interval (QTc) value is part of the information printed on the ECG. For men the QTc is normally less than 420 msec and for women the QTc is normally less than 440 msec.
In cardiology, the QT interval is a measure of the time between the start of the Q wave and the end of the T wave in the heart's electrical cycle.The QT interval represents electrical depolarization and repolarization of the ventricles.ike the R-R interval, the QT interval is dependent on the heart rate in an obvious way (the faster the heart rate the shorter the R-R Interval and QT interval) and may be adjusted to improve the detection of patients at increased risk of ventricular arrhythmia.