A nurse monitors a client with sudden onset of acute abdominal pain and faint vaginal bleeding. Which additional assessment finding is most concerning to the nurse?

• A. Late decelerations
• B. Early decelerations
• C. Accelerations
• D. Sinusoidal rhythm

Answer: (A)

This question tests how fetal heart rate patterns reflect fetal well-being in a pregnancy with acute abdominal pain and vaginal bleeding. Late decelerations, which occur after the peak of a contraction, signal uteroplacental insufficiency and fetal hypoxia. In the setting of sudden pain and bleeding, this pattern most strongly points to placental problems such as abruption and indicates the fetus is not tolerating the intrauterine environment, making it the most concerning finding.

Early decelerations mirror contractions and result from head compression; they are typically benign. Accelerations are reassuring and indicate good fetal oxygenation. A sinusoidal rhythm is also ominous and can reflect severe fetal anemia or profound hypoxia, but in this scenario the pattern that most directly indicates ongoing fetal distress due to placental issues is the late deceleration.