>>10958186What else would it be? Old age results in heart failure. Everything starts and ends with the heart.
You're heart never heals, that's why you've never heard of heart cancer. The cells just don't replicate.
Constant wear and tear, 24/7, every palpitation accumulating damage. Every time you go to sleep, the muscle slightly atrophying.
If I could replace my heart with a more robust one, I would in a heartbeat.