,PAST MEDICAL HISTORY: , COPD, history of hypercarbic hypoxemia, history of coronary artery disease, history of previous myocardial infarction, and history of liver cirrhosis secondary to alcohol use.
,PAST MEDICAL HISTORY : , COPD , history of hypercarbic hypoxemia , history of coronary artery disease , history of previous myocardial infarction , and history of liver cirrhosis secondary to alcohol use .