Síndrome de tako-tsubo variante apical complicado con gran derrame pericárdico y recurrencia tardía con variante medioventricular / Tako-tsubo cardiomyopathy with apical variant complicated by cardiac tamponade and mid-ventricular variant presentation during a delayed recurrence

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Embolias silentes tras cardioversión eléctrica de fibrilación auricular: ¿qué aporta la resonancia magnética cerebral? / Silent embolism after electrical cardioversion of atrial fibrillation: what does brain magnetic resonance imaging provide?

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Coronary sinus lead fragmentation and migration.

We report the case of a patient with ischemic cardiomyopathy who several years before underwent cardiac resynchronization therapy. He was admitted for surgical revision of the system due to coronary sinus lead failure. Percutaneous extraction of the lead was performed but an unusual complication related to the damaged lead occurred with relatively positive outcomes.

Precisión diagnóstica del electrocardiograma asistido por ordenador al diagnosticar hipertrofia ventricular izquierda en el bloqueo de rama izquierda / Diagnostic accuracy of computer-assisted electrocardiography in the diagnosis of left ventricular hypertrophy in left bundle branch block

Introducción y objetivos. La hipertrofia ventricular izquierda tiene implicaciones pronósticas. El electrocardiograma, la técnica recomendada con mayor frecuencia para su diagnóstico, está limitado en presencia de bloqueo de rama izquierda. Métodos. Se ha realizado un electrocardiograma y un ecocardiograma a 1.875 pacientes consecutivos (media de edad, 56±16 años) estudiados para descartar cardiopatía y/o hipertensión arterial, definiendo la hipertrofia ventricular izquierda mediante ecocardiografía. Los electrocardiogramas fueron interpretados por la plataforma digital asistida por ordenador ELECTROPRES. Se determinaron sensibilidad, especificidad, valores predictivos y razones de verosimilitud de los criterios electrocardiográficos clásicos y de algunos algoritmos diagnósticos de hipertrofia en los pacientes con bloqueo de rama izquierda, y se comparó esos valores con los obtenidos en los sujetos sin él. Resultados. Se observó bloqueo de rama izquierda en 233 (12%) pacientes. La hipertrofia ventricular izquierda fue más frecuente en pacientes con bloqueo de rama izquierda (el 60 frente al 31%). En estos, las sensibilidades fueron bajas pero similares a las halladas en pacientes sin bloqueo (del 6,4 al 70,9%), mientras que las especificidades fueron altas (del 57,6 al 100%). Las razones de verosimilitud fueron: positivas (1,33-4,94) y negativas (0,50-0,98). Los algoritmos diagnósticos, los productos duración-voltaje y algunos criterios compuestos tuvieron las mejores sensibilidades. Conclusiones. Se puede diagnosticar hipertrofia del ventrículo izquierdo en presencia de bloqueo de rama izquierda con una precisión diagnóstica al menos similar a la obtenida en los pacientes sin este trastorno de conducción. La interpretación del electrocardiograma asistida por ordenador puede ser útil al facilitar el uso de algoritmos diagnósticos más precisos (AU)

Introduction and objectives. Left ventricular hypertrophy has important prognostic implications. Although electrocardiography is the technique most often recommended in the diagnosis of hypertrophy, its diagnostic accuracy is hampered in the presence of a left bundle branch block. Methods. In 1875 consecutive patients (56±16 years) undergoing studies to rule out heart disease and/or hypertension, 2-dimensional echocardiography and electrocardiography were performed simultaneously in an outpatient clinic. Digitized electrocardiograms were interpreted using an online computer-assisted platform (ELECTROPRES). Sensitivity, specificity, likelihood ratios, and predictive values of standard electrocardiographic criteria and of some diagnostic algorithms for left ventricular hypertrophy were determined and compared with the findings in patients with neither left bundle branch block nor myocardial infarction. Results. Left bundle branch block was present in 233 (12%) patients. Left ventricular hypertrophy was detected more frequently in patients with left bundle branch block (60% vs 31%). In patients with left bundle branch block, sensitivities were low but similar to those observed in patients without it, and ranged from 6.4% to 70.9%, whereas specificities were high, ranging from 57.6% to 100%. Positive likelihood ratios ranged from 1.33 to 4.94, and negative likelihood ratios from 0.50 to 0.98. Diagnostic algorithms, voltage-duration products, and certain compound criteria had the best sensitivities. Conclusions. Left ventricular hypertrophy can be diagnosed in the presence of left bundle branch block with an accuracy at least similar to that observed in patients without this conduction defect. Computer-assisted interpretation of the electrocardiogram may be useful in the diagnosis of left ventricular hypertrophy as it enables the implementation of more accurate algorithms (AU)

Diagnostic accuracy of computer-assisted electrocardiography in the diagnosis of left ventricular hypertrophy in left bundle branch block.

INTRODUCTION AND OBJECTIVES: Left ventricular hypertrophy has important prognostic implications. Although electrocardiography is the technique most often recommended in the diagnosis of hypertrophy, its diagnostic accuracy is hampered in the presence of a left bundle branch block. METHODS: In 1875 consecutive patients (56±16 years) undergoing studies to rule out heart disease and/or hypertension, 2-dimensional echocardiography and electrocardiography were performed simultaneously in an outpatient clinic. Digitized electrocardiograms were interpreted using an online computer-assisted platform (ELECTROPRES). Sensitivity, specificity, likelihood ratios, and predictive values of standard electrocardiographic criteria and of some diagnostic algorithms for left ventricular hypertrophy were determined and compared with the findings in patients with neither left bundle branch block nor myocardial infarction. RESULTS: Left bundle branch block was present in 233 (12%) patients. Left ventricular hypertrophy was detected more frequently in patients with left bundle branch block (60% vs 31%). In patients with left bundle branch block, sensitivities were low but similar to those observed in patients without it, and ranged from 6.4% to 70.9%, whereas specificities were high, ranging from 57.6% to 100%. Positive likelihood ratios ranged from 1.33 to 4.94, and negative likelihood ratios from 0.50 to 0.98. Diagnostic algorithms, voltage-duration products, and certain compound criteria had the best sensitivities. CONCLUSIONS: Left ventricular hypertrophy can be diagnosed in the presence of left bundle branch block with an accuracy at least similar to that observed in patients without this conduction defect. Computer-assisted interpretation of the electrocardiogram may be useful in the diagnosis of left ventricular hypertrophy as it enables the implementation of more accurate algorithms.

Síndrome de Brugada asintomático precipitado por una infección por el virus de la gripe pandémica (H1N1) 2009 / Asymptomatic Brugada syndrome unmasked by influenza virus subtype H1N1 infection

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