Figure 1 displays the market size forecasts of atrial fibrillation for various countries found on the Pharma Intelligence Center. As expected the US has the biggest market size with all other countries having significantly lower forecasts, each barely scraping above the $1,000m mark. 

What is of interest in this graph is that consistently across all countries, from 2022 to 2023 the market size is expected to fall massively. Although this drop is most noticeable in the US; and Germany to a lesser extent, the trend is followed by all other countries whose data is available here as shown in table 1.