The effect of automatic gain control in hearing-impaired listeners with different dynamic ranges.

The purpose of this study was to evaluate the effect of Automatic Gain Control (AGC) on the speech perception of hearing-impaired listeners with varying degrees of reduced dynamic range. Linearly amplified and AGC recordings of the CUNY-Nonsense Syllable Test (CUNY-NST) were constructed in quiet and in noise. They were presented to 30 subjects with flat to gradually sloping sensorineural hearing loss separated into three groups of ten by mean width of dynamic range for puretones.

Ventricular ectopy associated with peroral colonic lavage.

Peroral colonic lavage solutions are widely used to prepare patients for colonoscopy. The effects of peroral colonic lavage on cardiac rhythm have not been evaluated previously. Using continuous electrocardiographic monitoring, the authors evaluated cardiac rhythm in 22 patients undergoing 24 colonoscopic examinations.

Periportal tuberculous adenitis: a rare cause of obstructive jaundice.

A patient with a clinical history of pulmonary tuberculosis presented with obstructive jaundice. Compression of the extrahepatic bile ducts was caused by calcified lymph nodes secondary to tuberculous adenitis of the porta hepatis. The role of radiologic methods in the diagnosis and management of this unusual complication is discussed.