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Updated: Dec 17, 2025

A Modified Two Kidney One Clip Mouse Model of Renin Regulation in Renal Artery Stenosis
Published on: October 26, 2020
[Hypertension, RAAS blockade and risk in COVID-19 patients]
1docent, bitr överläkare, ordförande i Svensk förening för hypertoni, stroke och vaskulär medicin, hjärtkliniken, Danderyds sjukhus.
Abstract:
SARS-coronavirus 2 (SARS-CoV-2) enters the host-cells by binding the transmembraneous angiotensin converting enzyme 2 (ACE2) when causing coronavirus disease 2019 (COVID-19). The role of angiotensin converting enzyme inhibitors (ACE) and angiotensin II receptor blockers (ARB) in COVID-19 is debated. Several well-conducted observational studies show no increased risk from RAAS blockade in COVID-19 patients and are detailed in this brief review. The Swedish Society of Hypertension, Stroke and Vascular Medicine supports current recommendations that ongoing RAAS blockade should be maintained in patients with COVID-19.
Insights
This review finds no increased risk for patients on renin-angiotensin system (RAS) blockade during COVID-19. Current recommendations support continuing these vital medications for hypertension and heart conditions.
Area of Science:
- Cardiovascular Medicine
- Infectious Diseases
- Pharmacology
Background:
- SARS-CoV-2 utilizes ACE2 for host cell entry, the target of RAAS-blocking medications.
- The safety of renin-angiotensin system (RAS) blockade in COVID-19 patients remains a significant clinical question.
Purpose of the Study:
- To review the current evidence regarding the role of ACE inhibitors and ARBs in COVID-19 patients.
- To inform clinical practice and recommendations for managing patients on RAAS blockade during the pandemic.
Main Methods:
- Review of well-conducted observational studies.
- Analysis of existing clinical data on COVID-19 outcomes in patients using RAAS blockade.
Main Results:
- Multiple observational studies indicate no elevated risk associated with RAAS blockade in COVID-19.
- Evidence suggests continued use of these medications does not worsen COVID-19 prognosis.
Conclusions:
- Ongoing RAAS blockade should be maintained in patients with COVID-19.
- The Swedish Society of Hypertension, Stroke and Vascular Medicine endorses current guidelines supporting RAAS blockade continuation.
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Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors
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Hypertension III: Clinical Manifestations and Diagnostic Studies

