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I n t r o d u c t i o n: The COVID-19 pandemic has put healthcare systems worldwide under huge strain, resulting in a significant loss of their capacity and availability. Patients have become more reluctant to contact their doctors or call an ambulance in case of myocardial infarction (MI) symptoms onset. It has been accompanied by a significant decrease in the number of coronary angiography and PCI procedures performed. O b j e c t i v e s: The aim of the study is to evaluate the role of online health information in the patient- dependent phase of MI management during the COVID-19 lockdown in Europe. Methods: We analyzed Google Trends data on the popularity of phrases related to MI symptoms, respiratory tract infection, urological complaints, and terms unrelated to health, for the period of the first COVID-19 lockdown, along with the data from the corresponding weeks from 2017-2019 in seven European countries. R e s u l t s: The search volume for particular symptoms of myocardial infarction increased in all studied countries, compared to the analogous period from 2017-2019, with a significant increase in for chest pain, shortness of breath, fear, and palpitations in most countries. These changes have not been accompanied by increased interest in terms related to respiratory tract infection symptoms and urological complaints. C o n c l u s i o n s: Our findings suggest that during lockdown, patients with MI symptoms may have tried to manage their complaints on their own, using information from the Internet. This demonstrates the growing role of the Internet in the patient's decision-making process in the emergency situation, indicating a growing need for reliable and freely available online information provided by healthcare professionals.