Somers - Figure 45
Awake, CPAP-Rem & OSA-Rem
FIG. 45: This is a repeat of Figure 16, showing the acute responses to apnea and illustrating that at the end of an apnea, there are a number of very significant stressors, namely severe hypoxemia, hypercapnia, significant sympathetic vasoconstriction with high levels of catecholamines in the bloodstream, and very high pressure levels.[5] In other words, the heart is having to deal with a high afterload in the setting of a high catecholamine, hypercapnic, and hypoxic environment.
Somers V. Chest 2016:00.
References
[5]
Somers VK, Dyken ME, Clary MP, Abboud FM. Sympathetic neural mechanisms in obstructive sleep apnea. J Clin Invest. 1995;96:1897–1904.
