RESUMEN
We assessed the significance of transient left ventricular dilation (TLVD) during single photon emission computed tomography (SPECT) dipyridamole thallium-201 scintigraphy (DTS) in 49 patients who underwent both DTS and diagnostic coronary arteriography. Quantitative analysis of DTS images and independent review by 3 experienced observers determined that 17 patients had TLVD and 32 patients had no TLVD. Patients with TLVD were similar to patients without TLVD with respect to age, history of myocardial infarction, coronary risk factors and occurrence of chest pain or electrocardiographic changes during DTS. The frequency of three-vessel coronary artery disease (3VD) was greater in patients with TLVD than in patients without TLVD (94% vs. 16%, p < 0.01). The sensitivity of TLVD was 76% and the specificity 96% for the detection of 3VD. Of the 16 patients with 3VD who manifested TLVD, standard SPECT DTS analysis demonstrated defect or perfusion abnormalities in 14 patients and no abnormalities in 2 patients. In conclusion, the finding of TLVD during SPECT DTS is a specific marker for severe coronary disease and can provide additive information to standard SPECT thallium-201 analysis.
Asunto(s)
Enfermedad Coronaria/diagnóstico por imagen , Dipiridamol , Hipertrofia Ventricular Izquierda/diagnóstico por imagen , Radioisótopos de Talio , Tomografía Computarizada de Emisión de Fotón Único , Adulto , Anciano , Anciano de 80 o más Años , Enfermedad Coronaria/fisiopatología , Femenino , Humanos , Hipertrofia Ventricular Izquierda/fisiopatología , Masculino , Persona de Mediana Edad , Factores de TiempoRESUMEN
Magnetic resonance angiography (MRA) offers a noninvasive alternative for studying normal and pathological blood vessels within the brain. Insights from important clinical aspects of intracranial vascular disease enable the effective application of MRA. Several MRA techniques have demonstrated clinical utility for the detection and characterization of intracranial vascular pathology. Clinical protocols should comprise combinations of time-of-flight and phase-contrast acquisitions to achieve diagnostic sensitivity.
Asunto(s)
Neoplasias Encefálicas/diagnóstico , Trastornos Cerebrovasculares/diagnóstico , Hemangioma/diagnóstico , Malformaciones Arteriovenosas Intracraneales/diagnóstico , Imagen por Resonancia Magnética/métodos , Humanos , Aumento de la Imagen/métodosRESUMEN
A series of large pelvoabdominal cystic masses in young females is presented. Ultrasound examination is the procedure of choice for the initial evaluation of these uncommon masses. Ultrasound can characterize internal structure and relationship to contiguous organs and tissues, and the examination can often suggest the etiology. In two cases, multiple pathologic entities were encountered.
