Low Cost Magnetic Resonance Imaging-Compatible Stepper Exercise Device for Use in Cardiac Stress Tests.

Cardiovascular disease is the leading cause of death worldwide. Many cardiovascular diseases are better diagnosed during a cardiac stress test. Current approaches include either exercise or pharmacological stress echocardiography and pharmacological stress magnetic resonance imaging (MRI).

A review of the literature examining linkages between organizational factors, medical errors, and patient safety.

The potential role of organizational factors in enhanced patient safety and medical error prevention is highlighted in the systems approach advocated for by the Institute of Medicine and others. However, little is known about the extent to which these factors have been shown empirically to be associated with these favorable outcomes. The present study conducted an intensive review of the clinical and health services literatures in order to explore this issue.

Exposure of rats to hyperoxia: alteration of lavagate parameters and macrophage function.

Exposure of rats to hyperoxia (100% oxygen for 64 h) resulted in striking alterations in the properties of samples obtained by bronchoalveolar lavage. The yield of neutrophils, lymphocytes, and red blood cells was increased, while the number of harvested alveolar macrophages decreased. The acellular lavage fluid level of protein was elevated, indicating lung damage.

High-dose magnesium sulfate attenuates pulmonary oxygen toxicity.

Background And Methods: Rats rapidly develop respiratory distress when exposed to 100% oxygen and die within a few days. Autopsy of the lung shows severe histologic damage characteristic of the adult respiratory distress syndrome. The purpose of this study was to evaluate the effects of magnesium sulfate loading in a rat model of acute oxygen toxicity.

Cardioskeletal mitochondrial myopathy associated with chronic magnesium deficiency.

A 3-year-old boy presenting with convulsions and carpopedal spasm had hypomagnesemia and hypermagnesuria due to congenital magnesium-losing nephropathy. Despite chronic oral and intermittent intravenous magnesium supplementation, he remained chronically hypomagnesemic. At age 4, he developed a progressive proximal myopathy and dilated hypertrophic cardiomyopathy that ultimately contributed to his death at age 14 years.

Magnesium deficiency in alcohol addiction and withdrawal.

The earliest description of clinical magnesium deficiency was reported in 1934. In 1954, Flink reported alcoholism as a cause of magnesium deficiency. This has been confirmed by low serum and tissue levels, balance studies, low exchangeable 28Mg and parenteral Mg retention tests.

Magnesium deficiency.

Over the past 40 years, human magnesium deficiency has become recognized as a world-wide clinical problem. In 1926, Leroy (1), demonstrated the absolute need of magnesium for growth and life in mice, and the need for magnesium in plants was demonstrated in 1860. Although clinical deficiency was first reported in 1934, it was not until the 1950s that interest in clinical magnesium deficiency developed rapidly.

Magnesium deficiency in alcoholism.

Significant magnesium deficiency occurs in chronic alcoholism. The evidence depends on a number of related lines of evidence: hypomagnesemia, a number of clinical symptoms in common with patients with nonalcoholic causes of magnesium deficiency, induction of magnesium excretion by alcohol ingestion (167-260% of control values), positive magnesium balance on alcohol withdrawal (average 1.15 meq/kg), decreased exchangeable magnesium (28Mg, mean deficit 1.

Hirsutism. Pathophysiology, clinical evaluation, treatment.

Hirsutism is generally an androgen-mediated disorder. Tremendous progress has been made in elucidating the numerous clinical disorders that can cause it. Systematic evaluation of hirsute women must be directed at determining the cause of hyperandrogenemia, which in turn allows specific and effective therapy to be initiated.

Magnesium deficiency in human subjects--a personal historical perspective.

Over the past 30 years human magnesium (Mg) deficiency has become an accepted fact in most medical circles. Our index patient had striking neurological manifestations including generalized tremulousness, grimaces and fibrillary twitches of facial muscles, athetoid and choreiform movements of upper extremities, dysphagia, inability to speak, repeated convulsions, and confusion. She had received glucose in water and saline intravenously for several months.

cis-Platinum-induced hypomagnesemia and peripheral neuropathy.

From January 1980 to September 1981, sixty-nine gynecologic oncology patients received cis-platinum at 4-week intervals. Serum magnesium was drawn prior to cis-platinum administration and then at regular intervals thereafter. cis-Platinum toxicity, especially peripheral neuropathy, was monitored closely.

Alterations of long-chain free fatty acid and magnesium concentrations in acute myocardial infarction.

Sixteen patients with acute myocardial infarction were subjects of a study of the changes in plasma magnesium and long-chain free fatty acid (FFA) levels. In each patient, there was a sharp fall of magnesium levels and a sharp rise of FFA levels shortly after onset of pain. Magnesium and FFA values returned to normal within three days.