If he has got any cancer, most prostate cancers are slow growing, so a few weeks or months post his cardiology event before a biopsy is probably neither here or there.
The PIRADS result shows a lump which may or not be cancerous, so a biopsy will be necessary at some point for a definite diagnosis. Don’t let him be palmed off with an often inaccurate rectal (TRUS) biopsy, which as well is sometimes inconclusive, go for a transperineal biopsy instead, where more samples can be taken.
I had no bleeding except for my first couple of pink wees after the biopsy, but I did have a giant bruised perineum afterwards.
I would ask the urologist to discuss the implications of a biopsy with his cardiologist. There is not really any surgery in the biopsy to cause bleeding, just some sample needles inserted. I had 42.
If you have private health insurance, all well and good, but there is no need to keep paying if not, as with a suspicion of cancer he should be enrolled on the NHS fast-track cancer 14 day treatment plan, with other deadlines subsequently.
Best of luck.
Cheers, John.