[Radioisotopic mapping of the arrhythmogenic focus in patients with chronic chagasic cardiomyopathy and sustained ventricular tachycardia]. / Mapeamento radioisotópico do foco arritmogênico em portadores de cardiopatia chagásica crônica e taquicardia ventricular sustentada.
Arq Bras Cardiol
; 60(6): 373-6, 1993 Jun.
Article
em Pt
| MEDLINE
| ID: mdl-8279975
PURPOSE: To localize the site of the origin of sustained ventricular tachycardia in chronic chagasic cardiomyopathy patients refractory to antiarrhythmic therapy by radionuclide angiography techniques. METHODS: Five patients underwent radionuclide angiography by intravenous administration of 25mCi 99mTc. The images were obtained in sinus rhythm and during sustained ventricular tachycardia induced in the electrophysiologic laboratory for endocardial mapping. Amplitude and phase images were obtained resulting in a contraction wave synchronic to ventricular dispolarization. RESULTS: All patients had haemodynamic stability during the arrhythmia. One patient had incessant ventricular tachycardia. Mean ejection fraction was 0.38. In 4 patients the site of the origin of ventricular tachycardia was posterior and in one it was localized in the interventricular septum. There was identity in the site of the origin of ventricular tachycardia obtained by endocardial mapping or radionuclide angiography in all patients. The therapy was chemical ablation in 3 patients, surgical aneurysmectomy in one and pharmacologic therapy in the last patient. CONCLUSION: The site of the origin of ventricular tachycardia can be estimated by analyzing the contraction wave obtained by radionuclide angiography techniques in patients with hemodynamic stable sustained ventricular tachycardia.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cardiomiopatia Chagásica
/
Taquicardia Ventricular
Limite:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
Pt
Revista:
Arq Bras Cardiol
Ano de publicação:
1993
Tipo de documento:
Article
País de publicação:
Brasil