Inferior Q waves in apparently healthy subjects: Should we take a deep breath? An electrocardiographic, echocardiographic and cardiac magnetic resonance study.
J Electrocardiol
; 49(1): 46-54, 2016.
Article
en En
| MEDLINE
| ID: mdl-26387880
ABSTRACT
AIM:
To evaluate the diagnostic accuracy of electrocardiographic inferior Q waves persistence during inspiration and echocardiographic segmental wall motion abnormalities for the detection of previously unsuspected silent myocardial infarction, by using cardiac magnetic resonance as the gold standard.METHODS:
We prospectively enrolled 50 apparently healthy subjects with inferior Q waves on routine electrocardiogram and high atherosclerotic risk profile. Patients underwent electrocardiogram during deep inspiration, standard transthoracic echocardiography, and cardiac magnetic resonance.RESULTS:
Inferior Q waves during deep inspiration persisted in 10 subjects (20%) and cardiac magnetic resonance was positive in 10 (20%). Between the 10 positive cardiac magnetic resonance subjects 8 showed persistence of inferior Q waves, giving a sensitivity of 80% (95%;CI 44.4-97.5%) and a specificity of 95% (95%;CI 83.1-99.4%). Segmental wall motion abnormalities were present overall in 10 subjects (20%), but only in 5 of the 10 positive cardiac magnetic resonance subjects, giving a sensitivity of 87.5% (95% CI 73.2-95.8) and specificity of 50% (95% CI 18.7-81.3).CONCLUSIONS:
Electrocardiographic inferior Q waves persistence during deep inspiration is a simple test with a high accuracy for diagnosis of silent myocardial infarction. Standard echocardiography resulted less accurate.Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Ecocardiografía
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Imagen por Resonancia Cinemagnética
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Electrocardiografía
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Enfermedades Asintomáticas
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Contencion de la Respiración
/
Infarto del Miocardio
Tipo de estudio:
Diagnostic_studies
/
Evaluation_studies
Límite:
Aged
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Female
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Humans
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Male
Idioma:
En
Año:
2016
Tipo del documento:
Article