Metadata about: Background: Patients with cardiovascular disease are at increased risk of critical illness and mortality from Covid-19 disease. Conflicting findings have raised concerns regarding the association of angiotensin converting enzyme inhibitors (ACEI) and angiotensin receptor blockers (ARBs) use with likelihood or severity of infection during this pandemic. Objective: To study the cumulative evidence for association of ACEI/ARB use with outcomes among patients with confirmed Covid-19. Methods: The MEDLINE and EMBASE databases were thoroughly searched from November 01, 2019 to May 15, 2020 for studies reporting on outcomes based on ACEI/ARB use in patients with confirmed Covid-19. Preferred reporting items for systematic review and meta-analysis guidelines were used for the present study. Relevant data was collected and pooled odds ratios (OR) with 95% confidence intervals (CI) were calculated using random-effects model. Main Outcome measures: In-hospital mortality was the primary end of interest. Second end-point was severe or critical illness defined as either need for intensive care unit, invasive mechanical ventilation, or mortality. Results: Fifteen studies with total of 23,822 patients (N ACEI/ARB=6,650) were included in the present analysis. Overall, prevalence of ACEI/ARB use ranged from 7.7% to 46.2% across studies. Among 10 studies, patients using ACEI/ARB had similar odds of mortality [OR 1.03 (0.69-1.55)] and severe or critical illness [1.18 (0.91-1.54)] compared to those not on ACEI/ARB. In an analysis restricted to patients with hypertension, ACEI/ARB use was associated with significantly lower mortality [0.64 (0.45-0.89)], while the odds of severe/critical illness [0.76(0.52-1.12); p=0.16] remained non-significant compared with non-ACEI/ARB users. Conclusion: There is no evidence for increased risk of severe illness or mortality in patients using ACEI/ARB compared with non-users. In patients with hypertension, ACE/ARB use might be associated with reduced mortality, however these findings need to be confirmed in prospective randomized controlled trials.

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