A physician taking care of a patient with asthma bronchiale (AB) or chronic obstruction pulmonary disease (COPD) faces a dilemma in cases of previous infarction of myocardium or heart arrhythmia, high blood pressure or heart failure. In all these conditions beta-blocators are indicated, because they improve significantly the prognosis of these patients.
On the other hand, these beta-blocators may in some patients (AB or COPD) cause bronchoconstriction that possibly result in fatal asthmatic attacks.