Sonic wave angiogram

Hi I have heard of a procedure I believe is sonic waves angiogram where they soften the calcium,balloon the arteries to the heart and put in stents to increase blood flow to the heart. Is this a safe procedure and is available to a 90 year old in good shape other than 70% blockage to 2 main arteries to the heart. My condition makes me limit walking any distance before getting angina. I also sleep a lot and tire easy.
Any info would be greatly appreciated. Thank you ….Fos