AUTOREGULATION-CAUSES OF BRADYCARDIA

SUMMARY

Tip: CO = HR x SV

1. Increased CO: due to increased arterial baroreceptor activity.

2. Increased venous return: due to increased atrial baroreceptor activity.

3. Expiration: due to increased venous return & increased atrial baroreceptor activity.

4. Emotions (fear): due to limbic cortex inhibiting the vasomotor area.

5. Hypothermia.

6. Raised ICP: due to Cushing's response.

Reference(s)

Barrett, K.E., Barman, S.M., Boitano, S., Brooks, H.L., Weitz, M., Brian Patrick Kearns, Ganong, W.F. and Mcgraw-Hill Education (Firm (2016). Ganong’s review of medical physiology. 25th ed. New York: Mcgraw Hill Education.
Hall, J.E. and Hall, M.E. (2020). Guyton And Hall Textbook Of Medical Physiology. 14th ed. S.L.: Elsevier - Health Science.
West, J.B. and Luks, A.M. (2021). West’s Pulmonary Pathophysiology. Lippincott Williams & Wilkins.