Looks and sounds like a 1000 rpm twin at the rated rpm

Hi Guys, sorry to hear about the heart attack. I had mine about 4 years ago. Like you I had no serious pain, just a weird feeling that something wasn`t quite right. My Wife has blood pressure issues and has a blood pressure testing machine, she took my blood pressure and the machine advised that I was having a heart attack. I was rushed to the local hospital where they announced that I was perfectly healthy and were going to send me home, fortunately one junior doctor asked for a blood test. After a heart attack the body releases an enzyme into the blood stream and there is a test for this. My test came back positive.
Three days later they got me a bed in Lismore hospital in Northern New South Wales, they ran tests and announced that I was perfectly healthy, fortunately one junior doctor suggested doing a stress test. I was hooked up to every piece of monitoring equipment available and put on a treadmill. They slowly increased the speed until, guess what, I had another heart attack. They revived me and sent me to the catheter laboratory where over the next few weeks they fitted three stents in my cardiac arteries, two of which had 90% blockages.
The reason for my arteries becoming clogged is almost certainly due to the 5 months I spent immobilized by a broken neck.
After returning home, I had to attend cardiac rehabilitation, this is where they introduce old people to gymnasium equipment, what the point is of putting an 80 year old disabled woman on an exercise bicycle still mystifies me. They also give you the lecture on your lifestyle and diet: no alcohol, no smoking, no cheese, no butter, no bacon, no animal fats, the list is endless basically you are expected to live on green tea and boiled cabbage, you won`t live any longer it will just feel like it!
I too was prescribed statins which I took for six months until the bush fires and covid made it impossible to access a doctor to get repeat prescriptions. I`m still going strong, I drink lots of red wine, I smoke and work seven days a week. I don`t expect to live forever but am trying to get as much done as possible in the time available.

So good luck with your recovery, try to find yourself a good doctor, my experience suggests that some of them don`t know what they are talking about. A small piece of encouragement is that my Father in Law lived with a stented heart for 10 years plus before dementia got him at 84.

Best of luck, stay well,

Bob