I did angiogram before since cardiologist suspect blockage. Fortunately, my vessels are clear, not blocking.
I still remember the feeling of crawling catherer through my arm. 

i was told by my doctor the opposite...i had my 1st angiogram/angioplasty at age 40...5 stents. 2nd Angioplasty at age 52..1 stent. Bypass at age 54..only after no stenting options. So roughly i had a 14 years time gap before having to do the Bypass.
Dont worry about Angioplasty...nowadays its done to so many...its almost like a small procedure but the end result is almost a miracle..you will feel much energetic and younger...believe me....3 days after surgery you will be back home...a week after that..you will be brist walking in the garden..everything will come back normal...including all those evil-vice habits that got you there at the first place...  

Stay away from everything sugary...that will kill you more then nicotine. No worries...dont listen to quarks..do your own research..learning more about your conditions will bring you more understanding ..acceptance and peace...take care!

don't simply do angiogram unless u get a second opinion.

the procedure is very invasive.

could damage your veins.