My cardiologist has said i don't need a pacemaker for my 2nd degree heart block as i don't have symptoms of blacking out etc. is this good news?

Not at all: If you are symptomatic , you may need pacemaker even for first degree heart block. Even if there is no block and your heart rate is low and you become symptomatic , you are candidate for pacemaker . Black out is one of the indication for pacemaker treatment . In conclusion , while you are blacking out , i would not say , the news is a good one . I would suggest , second opinion.

AV block: There are two types of 2nd degree av block. If you have asymptomatic type 1, following without a pacer is indicated. If you have type 2, a pacer is indicated even w/o symptoms. We don't know which type you have, so judging the news is difficult. You need follow up in any case.