True or false: A prolonged deceleration can occur due to maternal heart rate changes.

• A. True
• B. False
• C. Only during labor
• D. Only in multiple pregnancies

Answer: (A)

A prolonged deceleration in fetal heart rate can indeed occur due to maternal heart rate changes. Prolonged deceleration refers to a decrease in the fetal heart rate that lasts for an extended period, generally over 15 seconds and more than 15 beats below the baseline. Various factors can contribute to this phenomenon, including maternal conditions such as hypotension, hypoxia, or heart disease that affect blood flow and oxygen delivery to the fetus. When the maternal heart rate changes significantly, it can impact placental perfusion and consequently lead to changes in fetal heart rate patterns.

The other options do not accurately capture the factors influencing prolonged deceleration. For instance, stating that it's only a possibility during labor ignores other situations such as maternal complications during pregnancy. Suggesting it occurs only in multiple pregnancies overlooks the broader scope of maternal health's impact on fetal heart rate regardless of pregnancy type. Therefore, the assertion that a prolonged deceleration can occur due to maternal heart rate changes is correct, confirming the associated link between maternal and fetal cardiovascular dynamics.