67years old. svt prob.attrial tach. rbbb. fatigue and feeling faint at tiimes. should i be concerned?

SVT, RBBB, fatigue,: Cardiac arrhythmias should be addressed by a cardiologist. SVT can have many forms some of which are more significant,as can atrial arrhytmias. Check your thyroid status as that can precipitate arrhythmias, and check parathyroid status. Avoid alcohol, caffeine, meds with phenylephrine. Check for GERD, gallbladder and possible rare entities like carcinoid. f/u/ w/ doc and cardiologist