Hi @kat7707 While you're waiting for a reply from @sbergerkinkade and other members with DLBCL to reply, I want to welcome you to Mayo Connect. You're in a tough position of having to make a decision which may impact your life ahead. I can understand, with your previous health issues of stroke and a lung condition, that you're not eager to rush in to a chemo regimen.

RChop consists of five drugs, which when used in combination have shown to be quite effective in treating large B cell lymphoma. As with any chemotherapy treatments, quite honestly, there can be side effects such as nausea, hair loss, possibly neuropathy, etc. However most often the side effects disappear after treatment and recovery. If all goes as planned, enduring those early months of therapy may add many more years of a healthy life for you. I was 65 at the time of my treatment for another type of aggressive blood cancer. It wasn't easy but so far I've bought myself another 7 years of a great life that would have been over had I not taken the chance.

But I know you'd like some answers before you take on that challenge, right? Since you've had two strokes previously, has the impact of these past events been discussed with your oncologist and other doctors who treated your strokes?
Before you proceed with the treatment it would be good to have a consult with your doctors about any potential complications because of your strokes or lung issues. You may also inquire frankly, if you choose to do nothing, what does that scenario look like. It's perfectly acceptable to inquire as to risk vs reward.
But at 64, you're still very young...too young to not look into the future.

Was there an underlying which caused your strokes? If you don't mind sharing, what lung issues are you having?