M husband had open heart surgery, 3-way bipass & mitral valve repair ). Right now he is having Atrial flutter which has his heart rate elevated 90-140. I would like to identify what category his meds are, .i.e, ACE inhibitors, ARB s, Beta blockers, Calcium channel blockers. The meds are: Paverone, Metoprolol Tart, Diovan. Than you.