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.
This represents the time that it takes for the electrical impulse generated in the sinus node to travel through the atria and across the atrioventricular node to the ventricles. The normal PR interval is 0.12 to 0.20 seconds, or 120 to 200 milliseconds. Multiple abnormalities of the PR interval â including prolongation of the PR interval, shortening of the PR interval and variation from beat to beat â can occur; these are discussed in detail in ECG Reviews and Criteria.