Background: Previous studies have identified that adults with cardiovascular diseases were disproportionately associated with a significantly increased risk of a severe form of COVID-19 and all-cause mortality. We aimed to describe the diagnosed COVID-19 cases and to estimate the symptomatic and asymptomatic suspected cases among individuals with pre-existing myocardial infarction myocardial infarction and their relatives in lockdown period. Methods: We conducted a two-week cross-sectional telephone survey, from May 4 to May 15, 2020, including all households with at least one individual with pre-existing cardiovascular disease in the past two years. We defined a suspected COVID-19 case when living with at least one individual tested positive to COVID-19, or when an individual has been in contact with a suspected or confirmed case since the March 1rst, or when a relative from the same house has been hospitalized or deceased for COVID-19. Results: We observed high rates of compliance with health measures during the lockdown period, regardless of age or risk factors. Among individuals with myocardial infarction history, two were COVID-19 confirmed, 13.37% were suspected (94/703) of whom 70.21% (66/94) asymptomatic. Conclusions: Individuals with myocardial infarction history presented different symptoms association with more respiratory signs. This population, which is older and associated with more comorbidities, is exposed to a high risk of complication in the event of contamination. Infection rates are relevant to adjusting the management of emergency departments in our region.
Estimating the proportion of coronavirus disease 2019 (COVID-19) cases among households in France : a cross-sectional study on individuals with myocardial infarction history