Re-entry within the atrioventricular (A-V) node is a common cause of atrial echo beats and paroxysmal atrial tachycardia. This report deals with observations made in four patients in whom the determining factor for atrial echo beats appeared to be a critical conduction delay occurring within the His-Purkinje system and not within the A-V node. The evidence in support of this conclusion is as fo...

A case is reported of a cryptococcal granuloma occurring within the lateral ventricle. The findings on angiography and brain-scanning led to a preoperative diagnosis of intraventricular meningioma. There are no previous reports of an isotope brain-scan in this condition and angiography usually shows an avascular swelling.

Intraventricular conduction defects are common following repair of various forms of congenital heart disease. Such defects may affect adversely the long-term prognosis of patients in whom cardiac hemodynamics were adequately restored. Review of previously published studies suggests that the site of the conduction defect may be the reason for the different prognoses reported for patients from di...

Obstructive hydrocephalus is a relatively common complication of intraventricular hemorrhage resulting in high morbidity and mortality. We report two cases of transient obstructive hydrocephalus caused by obstruction of mesencephalic duct in patients that presented with altered consciousness which resolved spontaneously in a few hours. In very rare cases, obstructive hydrocephalus due to intrav...

Neurocysticercosis is of emerging importance in the United States because of immigration from disease-endemic regions of Latin America. 1 Intraventricular neurocysticercal cysts are probably more frequent than previously thought and usually occur as single cysts in the fourth ventricle or as multiple cysts that frequently coexist with parenchymal and sub-arachnoid cysts. 2 However, multiple int...

Gliosarcoma is an unusual malignant neoplasm of the central nervous system. It shares the same clinical presentation, epidemiology and prognosis with glioblastoma multiforme. It is usually located within intraparenchymal compartment, especially in the supratentorial area adjacent to the cortical surface. Intraventricular location is extremely rare for gliosarcoma. We report a rare case of intra...