Balloon angioplasty, a brute force method, was the earliest intervention for coronary artery narrowing, involving forcing open the vessel without leaving anything behind.

“so it's a really brute force method isn't it to sort of force open something that's narrowing and of course at the time you weren't leaving anything behind so the best you could do was get in there inject saline back and forth basically use the hydraulic pressure of that to try to force open what was going on and then you you left”