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Biomedical subjects

S Katz

Publications and source records attributed to S Katz.

At least 433 records · Page 24Linked to original sources
PubMed1980

Radiographic signs of pulmonary embolism.

Contrary to popular belief, the chest x-ray is abnormal in most patients with documented pulmonary emboli. Radiographic signs include elevation of the diaphragm, infiltrate without infarction, pulmonary infarction, atelectasis, pleural effusion, pulmonary edema, signs of reduced blood flow and changes in the pulmonary vasculature. Recognition of these nonspecific signs can alert the physician to the need for definitive testing by lung scanning and angiography.

Aged↗
PubMed1980

Liver abscess at the Hadassah University during years 1967-77.

The charts of 36 patients, 27 males and 9 females, with liver abscess diagnosed at the Hadassah University Hospital between 1967-1977 were reviewed. The patients ranged in age from two months to 80 years and 25 patients (69%) were older than 40 years. The diagnosis was initially suggested by liver scan in 18 patients (50%), and was first made at autopsy in six (17%). The time-lapse between the onset of illness and diagnosis ranged from one day to 13 months, with a bimodal distribution. Large solitary abscesses were diagnosed later than small multiple abscesses. Ten patients (28%) were admitted with fever as the only sign of illness; specific signs and laboratory evidence of liver involvement often occurred late in the course of the disease. In 15 patients (42%), the etiology was regarded as amebic. In patients with pyogenic abscesses, the most commonly isolated organisms belonged to the normal bowel flora and biliary tract disease was present in 62% (13/21) of these patients. The overall mortality rate was 31%. This survey stresses the need for an increased awareness of the subtle presentation of liver abscess.

Adolescent↗
PubMed1979

Candida infected ascites caused by perforated ulcer.

A case is presented of ascites infected with candida in a cirrhotic patient. Candida infection of the ascitic fluid and candidemia were found 24 hours after perforation of a gastric ulcer. Combined intravenous therapy with Amphotericin B and 5-Fluorocytosine eradicated the infection within two weeks. The need for comprehensive therapeutic approach in the debilitated patient prone to fungal and bacterial infection is emphasized.

Aged↗
PubMed1979

Properties of (Mg2 + Ca2+)-ATPase of erythrocyte membranes prepared by different procedures: influence of Mg2+, Ca2+, ATP, and protein activator.

Erythrocyte membranes prepared by three different procedures showed (Mg2+ + Ca2+)-ATPase activities differing in specific activity and in affinity for Ca2+. The (Mg2+ + Ca2+)-ATPase activity of the three preparations was stimulated to different extents by a Ca2+-dependent protein activator isolated from hemolysates. The Ca2+ affinity of the two most active preparations was decreased as the ATP concentration in the assay medium was increased. Lowering the ATP concentration from 2 mM to 2-200 microM or lowering the Mg:ATP ratio to less than one shifted the (Mg2+ + Ca2+)-ATPase activity in stepwise hemolysis membranes from mixed "high" and "low" affinity to a single high Ca2+ affinity. Membranes from which soluble proteins were extracted by EDTA (0.1 mM) in low ionic strength, or membranes prepared by the EDTA (1-10 mM) procedure, did not undergo the shift in the Ca2+ affinity with changes in ATP and MgCl2 concentrations. The EDTA-wash membranes were only weakly activated by the protein activator. It is suggested that the differences in properties of the (Mg2+ + Ca2+)-ATPase prepared by these three procedures reflect differences determined in part by the degree of association of the membrane with a soluble protein activator and changes in the state of the enzyme to a less activatable form.

Adenosine Triphosphatases↗
PubMed1979

A computer program for Wiener filtering of evoked potential data.

We have developed a computer program for Wiener filtering of evoked potential data. The basic algorithm involves computation of the difference berween the power spectrum of the sweep sum and the sum of power spectra of individual sweeps. Power spectra are computed by means of the discrete Fourier transform. The program is now being run on a LSI-11 computer in a neurophysiology research laboratory to analyze somatic evoked potential data from monkeys.

Animals↗
PubMed1979

Management of toxic megacolon: the significance of early recognition in medical management.

Twenty-seven patients with acute toxic dilatation of the colon (TM) as a complication of inflammatory disease of the colon are reported. To emphasize the importance of early recognition and therapy, we separated the patients into two groups: 19 were receiving care by the authors (series A) before the development of TM, and eight were seen in consultation after its onset (series B), TM subsided with medical therapy in 13 episodes among 19 patients in series A and two of eight B. The others underwent surgical therapy. There were no deaths in either group. The differences in management and mortality from other reports suggest a program of surveillance and therapy for this life-threatening situation.

Adolescent↗
PubMed1979

Coronary angiography after traumatic myocardial contusion.

A patient with myocardial trauma following blunt chest injury is presented who returned 4 months later with persistent cardiac symptoms. Left ventriculography showed asynergy of the mid-diaphragmatic surface of the left ventricle while coronary angiography showed normal coronary arteries. The value of cardiac catheterization and coronary angiography in patients in whom symptoms persist after traumatic myocardial contusion and in patients in whom additional coronary artery or other cardiac disease is suspected is emphasized.

Adult↗
PubMed1979

Hyperparathyroidism presenting with unusual neurological features.

A case of hyperparathyroidism, who presented with unusual complex neurological symptomatology is reported. Mental confusion, asterixis and elevated cerebrospinal fluid protein with marked pleocytosis dominated the neurological picture. All these findings subsided upon correction of hypercalcemia, suggesting direct relationship between cerebrospinal fluid abnormalities, asterixis and this metabolic disturbance.

Adenoma↗