what heart rate is considered st
The above is a normal sinus rhythm with a rate of 68 beats per minute with ST elevation of 2 mm (2 small boxes). The arrow is pointing at the ST segment of the EKG. If you look at Normal Heart Rhythm, you will note that the ST segment is neither elevated or depressed which is referred to as being isoelectric. A thorough evaluation of ST changes requires the use of a 12 lead EKG.