Created at 10:43 p.m. May, 15, 2026
Author:
sammattox829
Type of change:
Content error
Rationale for change
It seems like the explanation and card contradict one another. The explanation says decreased venous return results an initial increase in heart rate, and when Valsalva is released, the now-increased HR is corrected, resulting in a net decreased HR. This card says HR decreases initially, then increases
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- The Valsalva maneuver increases intrathoracic pressure, thus decreasing venous return to the heart and subsequently cardiac output (and BP) → heart rate should increase to compensate via an intact baroreceptor reflex
- With release of the Valsalva maneuver (i.e., after the strain phase), venous return and BP transiently overshoot, triggering increased baroreceptor firing and reflex bradycardia, resulting in decreased HR
- The answer to this card used to be simply "increased" but was changed to include the initial phase as well; according to AMBOSS, increased HR occurs with prolonged Valsava (Dec 2025)
- With release of the Valsalva maneuver (i.e., after the strain phase), venous return and BP transiently overshoot, triggering increased baroreceptor firing and reflex bradycardia, resulting in decreased HR
- The answer to this card used to be simply "increased" but was changed to include the initial phase as well; according to AMBOSS, increased HR occurs with prolonged Valsava (Dec 2025)
Lecture Notes
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Pathoma
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Boards and Beyond
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First Aid
Sketchy
Sketchy 2
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Picmonic
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Bootcamp
Watch associated Bootcamp video - Pressure and Flow Physiology : Sensory Receptors of Vasculature
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