Pacemaker or betapace induced hypertension

Had 6xCABG and dual chamber pacemaker in 1997.  Developed AFib 2001.  Treated with amiodarone after failed ablation.  Generator replaced 2004.  Developed amiodarone induced thyrotoxicosis and liver inflammation 4-08.  D/C Amiodarone, treated several months with high dose prednisone and 200mg atenolol for hyperthyroidism and AF.  On 7-08 underwent catheter ablation for AFib.  Worked well for 1 month.  80mg Betapace bid used after cardioversion 9-08.  AFib no longer a factor.  Taking warfirin and betapace af only at this point.  Pacemaker generator replaced 10-08 and blood pressure gradually increased to 150/95 five days afterward until present.  Previous pressures were consistently 110/70.  Pacemaker pulse is set on 80 bpm.  Colchicine was taken for 3 days just after generator change.  Also have tinnitis with hypertension.  So far, no relief with 50 mg atenolol bid and 80 mg betapace AF bid.  What caused the blood pressure change?  The new generator or setting, colchicine, betapace, prolonged high dose prednisone or luck?