Yes, my first vaccine was Pfizer and second was Moderna, which caused heart issues. I went to a heart specialist and was diagnosed with pericarditis from the vaccine. It took awhile for symptoms to improve (pain, shortness of breath etc.). I feel lucky though.
An unusual amount of people had severe symptoms in our area after the Moderna vaccine. Healthy people in their 30s for the most part. Our electrician had a heart attack and a few people died. Needless to say I didn’t go for a third. We know a guy who technically died from it, but he was revived - they got his heart going.