Letter: First aid in acute myocardial infarction.
D000319:Adrenergic beta-Antagonists / Q000009:adverse effects; D005392:First Aid; D006801:Humans; D009203:Myocardial Infarction / Q000628:therapy*; D011187:Posture; D012119:Respiration; D014700:Verapamil / Q000009:adverse effects
D000319:Adrenergic beta-Antagonists; D014700:Verapamil