title: Cardiac disturbances in thyrotoxicosis: diagnosis, incidence, clinical features and management.
abstract: In the present paper we studied 403 patients with different etiopathogenic and clinical forms of thyrotoxicosis: toxic multinodular goiter (36.7%), toxic adenoma (4.9%), Graves' disease (27.04%), transient thyrotoxicosis (subacute thyroiditis, painless thyroiditis, Hashitoxicosis) (21.09%), T3-thyrotoxicosis (9.42%), thyrotoxicosis factitia (0.74%). Eighty-seven patients (21.5%) had cardiac disturbances. The following arrhythmias were most common: atrial fibrillation (4.00%), ventricular premature beats (2.77%), paroxysmal supraventricular tachycardia (2.23%), atrial flutter (1.00%). Congestive heart failure occurred in 10.42% of the cases. Paroxysmal tachyarrhythmias were converted to sinus rhythm in 90% of the subjects, by a selected and sustained treatment: drug therapy (carbimazole 30-40 mg/day, Lugol solution 1/2/20, 10-15 drops/day, beta-adrenergic blockers (propranolol--60-120 mg/24 hrs), calcium channel blockers (verapamil--40-60 mg/24 hrs), cardiac glycosides (deslanosid) or DC cardioversion. In order to prevent recurrences and/or complications, drug therapy was subsequently completed with subtotal thyroidectomy or radioactive iodine (131I) therapy. Thus, we succeeded in maintaining the patients in a euthyroid state, in sinus rhythm and with an adequate cardiovascular function in 95.4% of the cases.
authors.affiliation: Department of Endocrinology, Clinical District Hospital No. 1, Timişoara, Romania.
authors.forename: H
authors.initials: H
authors.lastname: Vlase
authors.forename: G
authors.initials: G
authors.lastname: Lungu
authors.forename: L
authors.initials: L
authors.lastname: Vlase
mesh_terms: D000328:Adult; D003131:Combined Modality Therapy; D005260:Female; D006331:Heart Diseases / Q000175:diagnosis* / Q000453:epidemiology / Q000209:etiology / Q000628:therapy; D006801:Humans; D015994:Incidence; D008875:Middle Aged; D012383:Romania / Q000453:epidemiology; D013971:Thyrotoxicosis / Q000150:complications / Q000175:diagnosis* / Q000453:epidemiology / Q000628:therapy