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加拿大一项最新研究表明,心脏病伴哮喘的患者如果使用茶碱或以口服、用喷雾器方式服用β肾上腺素能受体激动剂,心源性死亡率提高两倍。但是采用定量吸入器使用
A recent Canadian study shows that patients with heart disease and asthma have twice as many cardioembolic deaths if they use theophylline or orally and beta-adrenergic receptor agonists. However, the use of metered-dose inhalers