„Dr. Google, my heart is trembling!” – the retrospective analysis of Google queries related to cardiovascular diseases symptoms in the years 2004-2019.

We used Google Trends (GT) to identify and analyze course over time and regional interest of seven topics: "Chest pain", "Cyanosis", "Edema", "Orthopnea", "Palpitation", "Shortness of breath", "Syncope". We analyzed secular trends using the Seasonal Mann-Kendall test and seasonal variation using time series decomposition. We calculated the interest of all topics in proportion to the Relative Search Volume (RSV) of "Chest Pain".