Lithium carbonate is an effective mood stabilizer. We treated a patient for hypertrophic cardiomyopathy due to chronic unsupervised lithium carbonate use. We noted: a) a previously normal ECG; b) the absence of any familiarity for sudden cardiac death; c) the associated nephrogenic diabetes insipidus; d) probable exaggerated lithium plasma concentrations, which had not been monitored over the past few years; and e) the unusual traits of the right ventricle. We would like to stress the need for regular cardiologic follow-up in psychiatric patients treated with lithium carbonate, to minimize its potential cardiac untoward consequences.
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