Revista chilena de pediatría
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The COVID-19 pandemic has highlighted different ethical dilemmas inday-to-day patient care. We analyzed the crisis caused by the pandemic and evaluate general aspects of ethical analysis in clinical practice and the context of the health crisis. In addition, we review some relevant ethical aspects related to the proportionality of the implemented measures, the palliative care management, and the challenges generated due to the lack of resources and professional duties, in relation to patients infected with COVID-19 and those chronic patients whose outpatient control is delayed.
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The renin-angiotensin-aldosterone system (RAAS) is the main plasma volume regulator, which maintains cardiovascular and hydrosaline homeostasis. In the classical pathway, the angiotensin converting enzyme (ACE) generates Angiotensin II (AngII), which is powerfully inflammatory and vasoconstrictive. This classical pathway is also regulated by ACE2, which converts AngI to Ang 1-9, and degrades AngII to Ang 1-7, whose vasodilatory and anti-inflammatory functions balance out the effects of AngII. ⋯ Experiments with recombinant ACE2 have shown a protective effect against overexpression of RAAS in coronavirus-infected animals, which is similar to that demonstrated with the use of AngII receptor blockers (AT1). Evidence on the protective role of ACE2 seems to support the recommendations re garding not discontinuing these drugs in COVID-19 infection. In this article, we present the current knowledge about the role of RAAS in coronavirus infection, based on physiopathological concepts, molecular bases, and experimental and clinical evidence.