In most cases, yes, but not immediately. Following a cardiac arrest, the DVLA in the UK requires you to stop driving and notify them. Whether and when you can drive again depends on several factors, including the type of heart rhythm that caused the arrest, whether you have had an ICD fitted, whether you have a Group 1 (ordinary) or Group 2 (lorry or bus) licence, and whether you experienced symptoms beforehand.
For Group 1 drivers who have had an ICD fitted after a cardiac arrest due to a shockable rhythm, there is typically a period of several months before driving may be considered. The rules are complex and have been updated over time. The DVLA and your cardiologist are the definitive sources. Do not drive until you have explicit confirmation that you may.
Our page on driving and the DVLA after cardiac arrest covers this in more detail, including the relevant guidance and how to notify the DVLA. Many members of our community have been through this process and can share their experience of navigating it.