How much does the maternal heart rate typically increase by term?

Study for the Sacramento State Medic Module 6 Test. Engage with flashcards and multiple-choice questions with detailed explanations. Prepare thoroughly for your assessment!

Multiple Choice

How much does the maternal heart rate typically increase by term?

Explanation:
Normal maternal cardiovascular adaptations during pregnancy include a rise in heart rate to meet the increased demands of the growing fetus and placenta. As pregnancy advances, blood volume expands significantly and systemic vascular resistance decreases, so the heart boosts output. By term, the resting heart rate is typically about 15–20 beats per minute higher than pre-pregnancy levels. For example, if baseline is around 70 bpm, you’d expect roughly 85–90 bpm at term. An increase of only 5–10 bpm would understate the changes, while 25–30 or 35–40 bpm would exceed the typical adjustment seen at term.

Normal maternal cardiovascular adaptations during pregnancy include a rise in heart rate to meet the increased demands of the growing fetus and placenta. As pregnancy advances, blood volume expands significantly and systemic vascular resistance decreases, so the heart boosts output. By term, the resting heart rate is typically about 15–20 beats per minute higher than pre-pregnancy levels. For example, if baseline is around 70 bpm, you’d expect roughly 85–90 bpm at term. An increase of only 5–10 bpm would understate the changes, while 25–30 or 35–40 bpm would exceed the typical adjustment seen at term.

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