A Patient Who Has Limited Exercise Tolerance Is Scheduled for a Thallium

Multiple Choice

A patient who has limited exercise tolerance is scheduled for a thallium scan with dipyridamole.Which clinical parameter should a nurse identify as a possible contraindication for this procedure?

A) Blood pressure ranges from 136/90 mm Hg to 162/96 mm Hg
B) History of asthma
C) Myocardial infarction 1 month ago
D) Serum potassium is 4.5 mEq/L and patient receives potassium supplement daily