Biomedical subjects
A Bornstein
Publications and source records attributed to A Bornstein.
Fracture of pacing electrode mimicking failure of pulse generator.
To our knowledge, this is the first reported case of spontaneous fracture of a pacing electrode with decreased amplitude of the pacing artifact, failure to capture, and intact sensing. We postulate that the difference in impedance of the pacemaker for sensing and stimulation may account for this phenomenon.
[Acute renal failure due to hyperuricemia as a presenting sign of acute leukemia (author's transl)].
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Cardiac effects of hemodialysis: noninvasive monitoring by systolic time intervals.
The effects of hemodialysis on cardiac performance were evaluated by systolic time intervals measured blindly in 15 chronic renal failure patients maintained free of circulatory congestion. After a mean dialysis of 8.7 hours, levels of blood urea nitrogen, serum creatinin, and potassium and body weight showed statistically significant decreases and serum calcium and hematocrit values increased; heart rate and both diastolic and systolic blood pressure did not change significantly. Left ventricular ejection time (LVET) and ejection time index (ETI) were significantly shorter, falling from within normal limits to below normal. Pre-ejection period (PEP) rose significantly. These changes are consistent with a two-fold immediate effect of hemodialysis: (1) reduction of stroke volume as reflected by decreased ETI; and (2) reduced Starling effect, with or without decreased contractility, as reflected by increased PEP.