Back in Feb. 2018 I had a 2 lead Medtronic pacemaker installed for Sic Sinus syndrome Bachcardia. All went well even after I was diagnosed with Non-Hodgins Lymphoma that May. Started chemo RCHOP in July and a bit of radiation in November and was NED (no evidence of disease) just last month. Pacemaker did just fine during whole time but last week I get a call from cardiologist saying that I'm showing signs of ventricular tachycardia...150 bpm. New, visiting Cardiologist, wants a stress test to to take Metoprol Tartrate 25mg. He doesn't really know my case history of a lot of heart testing, with very good results including nuclear, over the last year or my generally low blood pressure. I don,t plan to do anything before I get another opinion. but is it possible the chemo might have effected my heart...anyone dealt with that? Would I be a canidate for a 3 lead pacemaker...can a lead be added to existing unit?