BACKGROUND: Coronavirus disease 2019 (COVID-19) is likely to have significant implications for the cardiovascular care of patients. In most countries, containment has already started (on 17 March 2020 in France), and self-quarantine and social distancing are reducing viral contamination and saving lives. However, these considerations may only be the tip of the iceberg; most resources are dedicated to the struggle against COVID-19, and this unprecedented situation may compromise the management of patients admitted with cardiovascular conditions. AIM: We aimed to assess the effect of COVID-19 containment measures on cardiovascular admissions in France. METHODS: We asked nine major cardiology centres to give us an overview of admissions to their nine intensive cardiac care units for acute myocardial infarction or acute heart failure, before and after containment measures. RESULTS: Before containment (02-16 March 2020), the nine participating intensive cardiac care units admitted 4.8+/-1.6 patients per day, versus 2.6+/-1.5 after containment (17-22 March 2020) (rank-sum test P=0.0006). CONCLUSIONS: We confirm here, for the first time, a dramatic drop in the number of cardiovascular admissions after the establishment of containment. Many hypotheses might explain this phenomenon, but we feel it is time raise the alarm about the risk for patients presenting with acute cardiovascular disease, who may suffer from lack of attention, leading to severe consequences (an increase in the number of ambulatory myocardial infarctions, mechanical complications of myocardial infarction leading to an increase in the number of cardiac arrests, unexplained deaths, heart failure, etc.). Similar consequences can be feared for all acute situations, beyond the cardiovascular disease setting.