Parathyroidectomy eliminates arrhythmic risk in primary hyperparathyroidism, as evaluated by exercise test.
Eur J Endocrinol
; 169(2): 255-61, 2013 Aug.
Article
em En
| MEDLINE
| ID: mdl-23744591
ABSTRACT
OBJECTIVE:
To investigate whether parathyroidectomy (PTx) reverses risk factors for arrhythmias related to the QT dynamic changes evaluated during bicycle ergometry exercise test (ET).METHODS:
Twenty-four postmenopausal women with primary hyperparathyroidism (PHPT) (mean age 60.08.4 years) and 30 sex- and age-matched controls underwent ET, echocardiography, and biochemical evaluation. The following stages were considered during ET rest, peak exercise, and recovery. The patients were randomized to two groups 12 underwent PTx (group A) and 12 were followed-up conservatively (group B). After 6 months, the patients were studied again.RESULTS:
Groups A and B showed no differences in mean baseline biochemical values, echocardiographic parameters, and QTC interval. PHPT patients showed an increased occurrence of ventricular premature beats (VPBS) during ET compared with controls (37.0 vs 6.6%, P=0.03). Serum calcium level was a predictor of VPBS (P=0.05). Mean value of QTC was in the normal range at baseline (Group A 401±16.9; group B 402.25±13.5 ms) but significantly lower than controls (417.8±25.1 ms, P<0.01). A negative correlation was found between QTc and calcium values (P=0.03). Physiological reduction of QTc interval from rest to peak exercise was not observed in PHPT patients before surgery. After PTx, group A had a significant reduction in VPBs compared with baseline (at baseline, 5 of 12 vs none of 12 patients after PTx, P=0.03) and a restored normal QT adaptation during ET. Group B showed no significant changes after a 6-month period.CONCLUSIONS:
PTx reduces the occurrence of VPBs and restored the QTc adaptation during ET.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Arritmias Cardíacas
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Paratireoidectomia
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Complexos Ventriculares Prematuros
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Hiperparatireoidismo Primário
Tipo de estudo:
Clinical_trials
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Etiology_studies
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Prognostic_studies
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Risk_factors_studies
Limite:
Aged
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Female
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Humans
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Middle aged
Idioma:
En
Revista:
Eur J Endocrinol
Assunto da revista:
ENDOCRINOLOGIA
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Itália