The patient was admitted to the hospitalist service, treated with frequent small volume nebulizers, treated with IV Solu-Medrol and BiPAP support for COPD exacerbation.  The patient also noted with poorly controlled atrial fibrillation with a rate in the low 100s to mid 100s.  The patient subsequently received diltiazem, also received p.o. digoxin.  The patient subsequently responded well as well received IV antibiotics including Levaquin and Zosyn.  The patient made slow, but steady improvement over the course of his hospitalization.  The patient subsequently was able to be weaned off BiPAP during the day, but continued BiPAP at night and will continue with BiPAP if needed.  The patient may require a sleep study after discharge, but by the third day prior to discharge he was no longer utilizing BiPAP