OP is lucky, they generally go for the bypass first, then agioplasty from there on out.
Perhaps it wasn’t too severe or perhaps it was their age.
Next, the Y? Last time I went to the why I got ringworm. If you can afford it go to a nice clean professional Gym.
Don’t get me wrong, the Y’s are some great facilities in the good areas. Like Madam Ecke YMCA in Carlsbad California or the YMCA in La Jolla.
I have a nice one in my village.
The point being, do not put a man under a stress test that hasn’t done a damn physical thing for 15 years.
My Dad was FAA and had no exertion of energy for some time.
He was very smart but that cannot carry you. He was old school. Died in the 70’s.