Severe acute respiratory syndrome coronavirus 2 (SARSCoV2) caused a global coronavirus disease-2019 (COVID19) pandemic, as declared by the World Health Organization on March 11, 2020. COVID19 was confirmed for the first time in January 2020, and despite epidemic prevention efforts, the number of patients with COVID19 continued to increase, primarily in metropolitan areas. To prevent the further spread of COVID19, the Japanese government announced a state of emergency on 7 April 2020, similar to the lockdowns impleme nted in other countries. We showed a significant increase in office BP with the white coat phenomenon was observed during the state of emergency, as well as an increase in related stress, thereby indicating that we should pay more attention to BP management during stressful global events, including the COVID19 pandemic, to prevent cardiovascular events (Kobayashi K, et al. Hypertens Res 2022; Kobayashi K, et al. Ito S, et al. J Diabetes Investig Apr 18 Epub, 2022). In addition, since the onset of the COVID19 pandemic, the possible roles of renin angiotensin system (RAS) inhibitors in COVID19 have been debated as favorable, harmful, or neutral. ACE2 not only is the entry route of SARSCoV2 infection but also triggers a major mechanism of COVID19 aggravation by promoting tissue RAS dysregulation, which induces a hyperinflammatory state in several organs, leading to lung injury, hematological alterations, and immunological dysregulation. ACE inhibitors and ARBs inhibit the detrimental hyperactivation of the RAS by SARSCoV2 and increase the expression of ACE2, which is a counterregulator of the RAS. Several studies have investigated the beneficial profile of RAS inhibitors in COVID19; however, this finding remains unclear. Further prospective studies are warranted to confirm the role of RAS inhibitors in COVID19 (Matsuzawa Y, et al. Hypertens Res 2020; Matsuzawa Y, et al. Hypertens Res, 202; Sato R, et al. Clin Exp Nephrol 2022).
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