<s>[INST] hi. i had an ecg today. sinus rhythm slow.horizontal axis rbbb.qrs 153.rsr in v1v2.s>30ms in v5 v6. minor inferiorrepolarization disturbance secondary to rbbb flat or low negative t in avf with negative t inIII. borderline ecg. I m 55 years old.please reply. [/INST] Are you suffering from high blood pressure or any lungs problem.Not a matter of worry. Heart has two conduction system right and left and in your case right one is not functioning. usually occurs in patients with high blood pressure or may occur with aging. so basically we have to look for causes for it like I mentioned above or in most it's a age related change </s>