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Though we did not observe any appreciable adverse effects during chronic treatment, hypotension and pulmonary oedema may be precipitated in some patients at the start of treatment.' 020 Decreased contractile function during acute treatment, as occurred in the present study, might help to explain such undesirable effects.","journal-title":"Am HeartJ; Thus the influence of verapamil on left venventricular hypertrophy in adults"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"437","DOI":"10.1161\/01.CIR.64.3.437","article-title":"Verapamil: its potential for causing serious complications in patients with hypertrophic cardiomyopathy","volume":"64","year":"1981","unstructured":"Epstein SE, Rosing DR. Verapamil: its potential for causing serious complications in patients with hypertrophic cardiomyopathy. 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