Surgery? Mild? yup, sure, as long as it’s not your heart having it. So, how many stitches does it take to get a notch above “mild?” Doesn’t sound like a band aid and an aspirin fixed it?
Angioplasty/stent counts as surgery. Easy-peasy through a blood vessel distant from the heart, a couple stitches, or a cork (that’s what they called the plug they put in my leg) a little rest and you’re good to go.