Mr. Green is a 60-year-old former smoker with severe chronic obstructive pulmonary (COPD) and cardiac disease associated with frequent episodes of bronchospasm. Which of the following is a bronchodilator useful in COPD and least likely to cause cardiac arrhythmia? (AIPG 2010)
Ipratropium is the bronchodilator that is most likely to be useful in COPD without causing arrhythmias. Ipratropium is more effective in vagally mediated bronchoconstriction seen in COPD.