Detection of coronary artery disease by vasodilator thallium imaging of the heart with amyl nitrite inhalation: a pilot study.

Thallium imaging of the heart using dipyridamole-induced coronary arteriolar vasodilation has proven to be an effective means of detecting significant coronary stenosis. However, intravenous dipyridamole has not yet been made available for general use. We therefore examined the feasibility of substituting amyl nitrite inhalation as an arteriolar vasodilator prior to thallium imaging.

Effect of hyperthyroidism and its treatment on bone mineral content.

Patients with hyperthyroidism may develop osteopenia associated with fractures; however, there has been no general agreement on the incidence of osteopenia in hyperthyroidism or the recovery of the mineral loss after treatment of hyperthyroidism. We conducted a longitudinal prospective study on the effect of hyperthyroidism and its treatment on bone mineral content (BMC) using photon absorptiometry. We observed that both young and older hyperthyroid patients showed a significantly decreased baseline BMC compared with age- and sex-matched controls.

Ga-67 studies in a patient with acquired immunodeficiency syndrome and disseminated mycobacterial infection.

A well-documented case of acquired immunodeficiency syndrome (AIDS) with diffuse lymphadenopathy and disseminated mycobacteriosis in whom serial Ga-67 studies were performed is presented.

Thallium-201 myocardial imaging in patients on chronic hemodialysis.

10 long-term hemodialysis patients had immediate and redistribution thallium-201 myocardial imaging performed after a course of hemodialysis. Subjects had EKGs done on the same day before and after dialysis. 3 of the 10 subjects had resting thallium-201 myocardial imaging obtained on non-dialysis days.

Acute effects of phlebotomy on right ventricular size and performance in polycythemic patients with chronic obstructive pulmonary disease.

To assess the acute effects of phlebotomy on right ventricular size and performance, gated equilibrium radionuclide angiography was used to evaluate 10 patients with severe chronic obstructive pulmonary disease and erythrocytosis (hematocrit greater than 55%). The mean right ventricular ejection fraction was abnormal before (0.38) but not after (0.