Afib/htn.controlled w/flecainide 50x2,coreg 12.5 x2&losartan50 taken at night.bp ranges from 115/65 give or take mornings to 130/58 give or take evenings.diastolic of 55 is lowest it has gone. it is usually 58.is this ok?

When hypertension is treated, we aim for an optimal systolic number less than 120; unfortunately, diastolic pressure often drops below 60 in individual with isolated systolic hypertension, i.e. systolic pressure above 140 or higher but diastolic pressure below 80 before treatment, so we have to accept a decent drop in diastolic pressure. Your mean pressure is still above 80 so you are fine.