Better characterization of dipyridamole-induced myocardial stunning by systolic wall thickening. A gated perfusion SPECT study.
J Nucl Cardiol
; 27(1): 137-146, 2020 02.
Article
em En
| MEDLINE
| ID: mdl-29951894
ABSTRACT
AIM AND PATIENTS The aim of the present study was to assess the additional value of systolic wall thickening to myocardial perfusion in diagnosing myocardial stunning induced by dipyridamole infusion. We selected 52 ischemic patients (43 males; mean age 65.5 ± 7.64), with CAD documented by angiography. Ischemia was defined as a summed difference score ≥ 5. All patients underwent a 2-day gated perfusion SPECT protocol. The patients received a dose of 740 MBq of 99mTc-tetrofosmin after stress and at rest. RESULTS:
The post-stress LVEF was significantly lower than rest LVEF (48.3% ± 14.5% vs. 50.7% ± 15%; P = 0.0001). The wall thickening summed difference score was 3.97 ± 3.84 (P = 0.0001). At a multivariate regression analysis, only WT-SDS as independent variable was significantly correlated with myocardial ischemia (SDS) (P = 0.001). We divided patients according to SDS in those with mild (SDS < 8) and severe (SDS ≥ 8) ischemia. WT-SDS, but not ∆LVEF, was significantly different between groups.CONCLUSIONS:
WT-SDS showed a better correlation with the degree of ischemia than the depression in the global function of the left ventricle. It allowed to better identify the stunning phenomenon in patients submitted to pharmacological stress.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Isquemia Miocárdica
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Miocárdio Atordoado
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Tomografia Computadorizada por Emissão de Fóton Único de Sincronização Cardíaca
Tipo de estudo:
Etiology_studies
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Guideline
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Prognostic_studies
Limite:
Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
J Nucl Cardiol
Assunto da revista:
CARDIOLOGIA
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Itália