I'm really worried because I've been having heart palpitations for at least 3 hours. Can anxiety really cause them to go on for so long? And is it possible that someone could die from continuous heart palpitations like this?

Continuous heart palpitations due to anxiety can be distressing, but it is unlikely to directly cause death. However, prolonged episodes of palpitations can lead to complications such as fainting or worsening anxiety symptoms. It is important to address the underlying anxiety to help reduce the frequency and intensity of palpitations. In the meantime, you can take a beta-blocker like Metoprolol (25-50mg) to help control the heart rate and reduce palpitations. Remember to follow up with your healthcare provider for further evaluation and management.