What could be the cause of a fetal heart rate above 170 beats per minute at 35 weeks of pregnancy?
Jan 28, 2024
Source: Cainiu Health
Dr. Zhao Xiaodong
Introduction
In general, a fetal heart rate of 170 beats per minute at 35 weeks of pregnancy indicates fetal tachycardia, also known as an elevated fetal heart rate. This may be caused by factors such as fetal movement, maternal emotional fluctuations, fetal hypoxia, hyperthyroidism, or gestational hypertension. It is recommended to seek medical attention promptly, identify the underlying cause, and receive appropriate treatment under the guidance of a qualified healthcare provider.
In general, a fetal heart rate of 170 beats per minute at 35 weeks of pregnancy indicates fetal tachycardia, also known as elevated fetal heart rate. This may be caused by fetal movement, maternal emotional fluctuations, fetal hypoxia, hyperthyroidism, or gestational hypertension. It is recommended to seek medical attention promptly, identify the underlying cause, and receive symptomatic treatment under the guidance of a qualified physician. The specific analysis is as follows:
1. Fetal Movement
Elevated fetal heart rate at 35 weeks of pregnancy may be related to fetal movement. Fetal movement refers to spontaneous body movements or wriggling of the fetus within the uterus. If fetal movement occurs during fetal heart rate monitoring, it may temporarily lead to an increased heart rate. This is usually normal and not a cause for excessive concern.
2. Maternal Emotional Fluctuations
Significant emotional fluctuations in the pregnant woman may also lead to an elevated fetal heart rate. Strong emotions can affect maternal hormone levels through the neuroendocrine system, negatively impacting the fetus and potentially causing fetal tachycardia. Therefore, pregnant women should pay attention to regulating their emotions during pregnancy. Maintaining stable and positive mood helps keep the fetal heart rate within the normal range and supports healthy fetal development.
3. Fetal Hypoxia
Fetal hypoxia may occur at 35 weeks of pregnancy due to placental insufficiency or excessive umbilical cord entanglement. Hypoxia can lead to an increased fetal heart rate and may also result in reduced fetal movement. Prompt medical evaluation is recommended. Under professional guidance, oxygen therapy may be administered to help improve fetal oxygenation.
4. Hyperthyroidism
At 35 weeks of pregnancy, elevated levels of human chorionic gonadotropin (hCG) may stimulate increased thyroid hormone production, leading to hyperthyroidism in the mother. Symptoms may include goiter, palpitations, insomnia, and abnormal appetite. These conditions can also contribute to fetal tachycardia. Treatment may include medications such as propylthiouracil tablets, carbimazole tablets, or metoprolol tartrate tablets, as prescribed by a physician.
5. Gestational Hypertension
Gestational hypertension is a condition characterized by high blood pressure during pregnancy and may be associated with emotional stress, endocrine abnormalities, or a family history of hypertension. Symptoms may include edema, proteinuria, headache, and systemic small vessel spasms. This condition can impair placental blood flow, resulting in fetal tachycardia and impaired fetal growth. Blood pressure can be managed with medications such as labetalol hydrochloride tablets or methyldopa tablets, as directed by a healthcare provider.
Maintain healthy lifestyle habits and a regular diet. Engage in moderate exercise such as walking or prenatal yoga to enhance physical resistance.
