wow strange and scarey that a dr would send him home with a blood clot in heart , have never heard of them doing that. have really never heard of someone having a blood clot in heart and not having a heart attack.
prayers are with him and you .
I'm curious, how was his heart artery blockage diagnosed? Did he have a stress test, or angiogram? I'm guessing that a recent blood test showed evidence of a recent heart attack, but that's just a guess.
I'd question the doctor why your father isn't having an angiogram, it's the gold standard to determine if there is a blockage. Given the fact that your father isn't active, I'd think a once a week blood test would be very intrusive.
His doctor may have very good answers, but I'd ask the hard questions. It sounds like your father is very ill.
Keep us informed.