What characterizes an abnormal prolonged deceleration?

An abnormal prolonged deceleration in fetal heart rate monitoring is defined as a decrease in heart rate that lasts more than 2 minutes but less than 10 minutes. When the deceleration lasts more than 3 minutes, it is particularly concerning and indicates potential fetal distress requiring further evaluation and intervention. This extended duration could signal underlying issues such as uteroplacental insufficiency or other fetal conditions that could compromise the well-being of the fetus. Monitoring these decelerations closely is vital in assessing fetal health and ensuring timely medical responses if needed.