ABSTRACT
Background. Scintigraphy with iodine-123-metaiodobenzylguanidine (123I-MIBG) is a non-invasive tool for the assessment of cardiac sympathetic innervation (CSI) that has proven to be an independent predictor of survival. Recent studies have shown that diabetic patients with heart failure (HF) have a higher deterioration in CSI. It is unknown if 123I-MIBG has the same predictive value for diabetic and non-diabetic patients with advanced HF. An analysis is performed to determine whether CSI with 123I-MIBG retains prognostic utility in diabetic patients with HF, evaluated for a primary prevention implantable cardioverter-defibrillator (ICD). Material and methods. Seventy-eight consecutive HF patients (48 diabetic) evaluated for primary prevention ICD implantation were prospectively enrolled and underwent 123I-MIBG to assess CSI (heart-to-mediastinum ratio - HMR). A Cox proportional hazards multivariate analysis was used to determine the influence of 123I-MIBG images for prediction of cardiac events in both diabetic and non-diabetic patients. The primary end-point was a composite of arrhythmic event, cardiac death, or admission due to HF. Results. During a mean follow-up of 19.5 [9.3-29.3] months, the primary end-point occurred in 24 (31%) patients. Late HMR was significantly lower in diabetic patients (1.30 vs. 1.41, p = 0.014). Late HMR ≤ 1.30 was an independent predictor of cardiac events in diabetic (hazard ratio 4.53; p = 0.012) and non-diabetic patients (hazard ratio 12.31; p = 0.023). Conclusions. Diabetic patients with HF evaluated for primary prevention ICD show a higher deterioration in CSI than non-diabetics; nevertheless 123I-MIBG imaging retained prognostic utility for both diabetic and non-diabetic patients (AU)
Antecedentes. La gammagrafía con yodo-123-metayodobenzilguanidina (123I-MIBG) es una herramienta de la valoración de la actividad simpática cardiaca (ASC) que ha demostrado ser un predictor independiente de supervivencia. Estudios recientes han demostrado que los pacientes diabéticos con insuficiencia cardiaca (IC) presentan mayor deterioro de la ASC. Si 123I-MIBG tiene el mismo valor predictivo en diabéticos y no diabéticos es desconocido. Analizamos si la evaluación de la ASC con 123I-MIBG mantiene su utilidad pronóstica en pacientes diabéticos con IC evaluados para implante de DAI en prevención primaria. Material y métodos. Se incluyeron prospectivamente 78 pacientes (48 diabéticos) consecutivos evaluados para implante de DAI en prevención primaria a los que se les realizó una gammagrafía con 123I-MIBG para evaluar la ASC (índice corazón mediastino - ICM-). Se usó un modelo multivariado de riesgos proporcionales de Cox para analizar la influencia de 123I-MIBG en la predicción de eventos cardiacos tanto en pacientes diabéticos como no diabéticos. La variable principal de resultado es un compuesto de evento arrítmico, muerte cardiaca y hospitalización por IC. Resultados. Durante una media de seguimiento de 19.5 [9.3-29.3] meses, la variable principal de resultado ocurrío en 24 (31%) de los pacientes. El ICM tardío fue significativamente menor en el grupo de pacientes con diabetes mellitus (1.30 vs 1.41, p = 0.014). Un ICM tardío ≤1,30 fue predictor independiente de eventos cardiacos en pacientes diabéticos (HR 4,53; p = 0,012) y no diabéticos (HR 12,31; p = 0,023). Conclusión. Los pacientes diabéticos con IC grave evaluados para implante de DAI en prevención primaria presentan mayor deterioro de la ASC que los no diabéticos. 123I-MIBG mantiene utilidad pronóstica en pacientes diabéticos y no diabéticos con IC (AU)
Subject(s)
Humans , Male , Female , Ventricular Dysfunction/complications , Ventricular Dysfunction , Heart Failure/complications , Heart Failure , Prognosis , Primary Prevention/methods , Iodine Radioisotopes , Predictive Value of Tests , Diabetes Complications , Prospective Studies , Radionuclide Imaging/instrumentation , Radionuclide Imaging/methods , Cohort StudiesABSTRACT
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Subject(s)
Humans , Male , Female , Necrosis/enzymology , Necrosis/metabolism , Cardiomyopathies/genetics , Coronary Disease/genetics , Observational Study , Therapeutics/methods , Necrosis/complications , Necrosis/diagnosis , Cardiomyopathies/pathology , Coronary Disease/metabolism , Retrospective Studies , Therapeutics/instrumentationABSTRACT
BACKGROUND: Scintigraphy with iodine-123-metaiodobenzylguanidine ((123)I-MIBG) is a non-invasive tool for the assessment of cardiac sympathetic innervation (CSI) that has proven to be an independent predictor of survival. Recent studies have shown that diabetic patients with heart failure (HF) have a higher deterioration in CSI. It is unknown if (123)I-MIBG has the same predictive value for diabetic and non-diabetic patients with advanced HF. An analysis is performed to determine whether CSI with (123)I-MIBG retains prognostic utility in diabetic patients with HF, evaluated for a primary prevention implantable cardioverter-defibrillator (ICD). MATERIAL AND METHODS: Seventy-eight consecutive HF patients (48 diabetic) evaluated for primary prevention ICD implantation were prospectively enrolled and underwent (123)I-MIBG to assess CSI (heart-to-mediastinum ratio - HMR). A Cox proportional hazards multivariate analysis was used to determine the influence of (123)I-MIBG images for prediction of cardiac events in both diabetic and non-diabetic patients. The primary end-point was a composite of arrhythmic event, cardiac death, or admission due to HF. RESULTS: During a mean follow-up of 19.5 [9.3-29.3] months, the primary end-point occurred in 24 (31%) patients. Late HMR was significantly lower in diabetic patients (1.30 vs. 1.41, p=0.014). Late HMR≤1.30 was an independent predictor of cardiac events in diabetic (hazard ratio 4.53; p=0.012) and non-diabetic patients (hazard ratio 12.31; p=0.023). CONCLUSIONS: Diabetic patients with HF evaluated for primary prevention ICD show a higher deterioration in CSI than non-diabetics; nevertheless (123)I-MIBG imaging retained prognostic utility for both diabetic and non-diabetic patients.
Subject(s)
3-Iodobenzylguanidine , Defibrillators, Implantable , Diabetic Cardiomyopathies/prevention & control , Heart/innervation , Radiopharmaceuticals , Sympathetic Nervous System/diagnostic imaging , Ventricular Dysfunction, Left/prevention & control , Diabetes Mellitus , Diabetic Cardiomyopathies/diagnostic imaging , Diabetic Cardiomyopathies/mortality , Humans , Multivariate Analysis , Primary Prevention , Prognosis , Prospective Studies , Ventricular Dysfunction, Left/diagnostic imaging , Ventricular Dysfunction, Left/mortalityABSTRACT
Introducción y objetivo. Las concentraciones plasmáticas de colesterol unido a lipoproteínas de alta densidad (cHDL) descendidas constituyen un indicador de mal pronóstico en pacientes con síndrome coronario agudo. Hemos evaluado la relación entre las cifras de cHDL y la extensión de la necrosis miocárdica estimada por cardiorresonancia magnética en pacientes con infarto agudo de miocardio y elevación persistente del segmento ST en quienes se indicó reperfusión miocárdica. Pacientes y métodos. Análisis retrospectivo de 139 pacientes (edad media: 59,8 años; hombres: 79%) ingresados por infarto agudo de miocardio con elevación persistente del segmento ST y a quienes se efectuó una cardiorresonancia magnética. Las imágenes indicativas de necrosis miocárdica (realce tardío del gadolinio) se cuantificaron y relacionaron con la concentración de cHDL. Resultados. Los pacientes con cHDL≤40mg/dl (69% del total), en comparación con los que tenían un cHDL >40mg/dl, mostraron un área de necrosis miocárdica más extensa: el número de segmentos miocárdicos con patrón de necrosis transmural fue significativamente mayor (4,7 vs. 2,1; p<0,001), al igual que el porcentaje de necrosis miocárdica de la masa miocárdica total (18,2 vs. 11,3%; p=0,01). Los pacientes con disminución de cHDL tuvieron una menor fracción de eyección del ventrículo izquierdo (49,7 vs. 57,2%; p<0,001). Conclusiones. La concentración de cHDL disminuido es muy frecuente en los pacientes con infarto agudo de miocardio y elevación persistente del segmento ST. Este descenso de cHDL se asoció a una mayor área de necrosis y peor fracción de eyección del ventrículo izquierdo(AU)
Introduction and aim. Low plasma levels of high-density lipoprotein cholesterol (HDLC) is a prognostic factor in patients with acute coronary syndrome. The aim of this study was to evaluate the relationship between HDLC and myocardial necrosis estimated by cardiac magnetic resonance (CMR) in patients with acute ST-segment elevation myocardial infarction (STEMI) and reperfusion strategy. Methods. Retrospective analysis of 139 patients (mean age 59.8 years; 79% men) admitted with STEMI who underwent a CMR in the first week. Results. With a comparable reperfusion strategy used and time of ischemia, patients with HDLC ≤ 40mg/dL (69% of total) had more extensive areas of myocardial necrosis after STEMI, in number of segments with late gadolinium enhancement (RTG) with transmural necrosis pattern (4.7 vs. 2.1, P<.001) and in percentage of RTG with respect total mass myocardial (18.2 vs. 11.3%, P<.01), and worst left ventricular ejection fraction (LVEF) (49.7 vs. 57.2%, P<.001). Conclusions. We conclude that low HDLC are very common in patients with STEMI and associated with increased necrosis and a worse LVEF in the CRM study(AU)
Subject(s)
Humans , Male , Female , Middle Aged , Myocardial Infarction/diagnosis , Myocardial Infarction/therapy , Lipoproteins, HDL/analysis , Lipoproteins, HDL , Lipoproteins, HDL/pharmacokinetics , Acute Coronary Syndrome/epidemiology , Acute Coronary Syndrome , Myocardial Infarction/physiopathology , Myocardial Infarction , Retrospective StudiesABSTRACT
INTRODUCTION AND AIM: Low plasma levels of high-density lipoprotein cholesterol (HDLC) is a prognostic factor in patients with acute coronary syndrome. The aim of this study was to evaluate the relationship between HDLC and myocardial necrosis estimated by cardiac magnetic resonance (CMR) in patients with acute ST-segment elevation myocardial infarction (STEMI) and reperfusion strategy. METHODS: Retrospective analysis of 139 patients (mean age 59.8 years; 79% men) admitted with STEMI who underwent a CMR in the first week. RESULTS: With a comparable reperfusion strategy used and time of ischemia, patients with HDLC ≤40 mg/dl (69% of total) had more extensive areas of myocardial necrosis after STEMI, in number of segments with late gadolinium enhancement (RTG) with transmural necrosis pattern (4.7 vs. 2.1%, p < .001) and in percentage of RTG with respect to total mass myocardial (18.2 vs. 11.3%, p < .01), and worst left ventricular ejection fraction (LVEF) (49.7 vs. 57.2%, p < .001). CONCLUSIONS: We conclude that low HDLC are very common in patients with STEMI and associated with increased necrosis and a worse LVEF in the CRM study.
Subject(s)
Cholesterol, HDL/blood , Myocardial Infarction/pathology , Myocardium/pathology , Adult , Aged , Biomarkers/blood , Female , Humans , Linear Models , Magnetic Resonance Imaging , Male , Middle Aged , Myocardial Infarction/blood , Necrosis , Retrospective StudiesSubject(s)
Humans , Male , Adult , Cardiac Tamponade/complications , Cardiac Tamponade/diagnosis , Liver Abscess/complications , Liver Abscess/diagnosis , Streptococcus milleri Group/isolation & purification , Pericarditis/complications , Pericarditis/microbiology , Electrocardiography/methods , Electrocardiography , Anti-Bacterial Agents/therapeutic use , Cardiac Tamponade/microbiology , Cardiac Tamponade/physiopathology , Cardiac Tamponade , Liver Abscess/microbiology , Liver Abscess/physiopathologyABSTRACT
Introducción y objetivos. Evaluar la capacidad de la tomografía computarizada con multidetectores en el diagnóstico de la disfunción ventricular izquierda de origen coronario y valorar su exactitud diagnóstica comparándola con la combinación de coronariografía invasiva y resonancia magnética. Métodos. Se estudió a 40 pacientes consecutivos con disfunción ventricular izquierda de origen no filiado mediante coronariografía invasiva y resonancia con contraste. A todos ellos se les realizó además un estudio de tomografía computarizada con multidetectores incluyendo presencia de calcio coronario y su cuantificación, coronariografía y valoración tisular del miocardio. Resultados. La sensibilidad y la especificidad de la presencia de calcio coronario para identificar la disfunción ventricular izquierda de origen coronario fueron del 100 y el 31% respectivamente. Si se considera un score de calcio por Agatston>100, la especificidad sube al 58% manteniendo la sensibilidad del 100%. Los valores de sensibilidad y especificidad de la coronariografía por tomografía computarizada con multidetectores fueron del 100 y el 96% respectivamente; para la identificación de áreas de necrosis en la adquisición precoz, del 57 y el 100% y en la adquisición tardía, del 84 y el 96%. Para identificar a los pacientes coronarios con necrosis, la sensibilidad y la especificidad fueron del 92 y el 100% respectivamente. Conclusiones. De todas las herramientas diagnósticas disponibles en tomografía computarizada con multidetectores, la coronariografía es la que muestra mayor exactitud diagnóstica para determinar el origen coronario de la disfunción ventricular. La combinación del estudio coronariográfico y el estudio tisular del miocardio tras el contraste permite obtener en un solo examen información similar a la de la combinación de cateterismo y resonancia con contraste (AU)
Introduction and objectives. To evaluate the capability of multidetector computed tomography to diagnose the coronary etiology of left ventricular dysfunction compared with using invasive coronary angiography and magnetic resonance. Methods. Forty consecutive patients with left ventricular dysfunction of uncertain etiology underwent invasive coronary angiography and contrast magnetic resonance. All patients were evaluated with multidetector computed tomography including coronary calcium presence and score, noninvasive coronary angiography, and myocardial tissue assessment. Results. The sensitivity and specificity of the presence of coronary calcium to identify left ventricular dysfunction was 100% and 31%, respectively. If an Agatston calcium score of >100 is taken, specificity increases to 58% with sensitivity still 100%. Sensitivity and specificity for coronary angiography by multidetector computed tomography was 100% and 96%, respectively; for identifying necrosis in contrast acquisition it was 57% and 100%, respectively; and in late acquisition, 84% and 96%, respectively. To identify coronary ventricular dysfunction with necrosis, the sensitivity and specificity was 92% and 100%, respectively. Conclusions. Of all the diagnostic tools available in multidetector computed tomography, coronary angiography is the most accurate in determining the coronary origin of left ventricular dysfunction. A combination of coronary angiography and myocardial tissue study after contrast allows a single test to obtain similar information compared with the combination of invasive coronary angiography and contrast magnetic resonance (AU)
