We conclude that left ventricular diastolic collapse is a frequent sign of regional cardiac tamponade and could be a useful marker of tamponade in postoperative patients.

In this work, it is proposed a method for supervised characterization and classification of tumoral lesions in brain, based on the analysis of irregularities at the lesion contour on T2-weighted MR images. After the choice of a specific image, a segmentation procedure with a threshold selected from the histogram of intensity levels is applied to isolate the lesion, the contour is detected through the application of a gradient operator followed by a conversion to a "time series" using a chain code procedure. The correlation dimension is calculated and analyzed to discriminate between normal or malignant structures. The results found showed that it is possible to detect a differentiation between benign (cysts) and malignant (gliomas) lesions suggesting the potential of this method as a diagnostic tool.

Localized hypertrophy of the basal ventricular septum was detected in 27 (0.7%) of 4,000 patients, referred for echocardiography for clinical indications, who were studied prospectively. This finding was seen primarily in older patients (mean age 66 years) without resting left ventricular outflow gradients or a family history of hypertrophic cardiomyopathy or sudden death. Although patients presented with a variety of symptoms, these were not clearly related to the septal hypertrophy.

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