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Biomedical subjects

J O Kramer

Publications and source records attributed to J O Kramer.

6 recordsLinked to original sources
PubMed1985

Effects of glyburide therapy on lipoproteins in non-insulin-dependent diabetes mellitus.

Twenty-seven patients with non-insulin-dependent diabetes mellitus and fasting plasma glucose values greater than 140 mg/dl began glyburide therapy. After entry into the study, patients were classified into three phenotypes on the basis of their initial lipoprotein profile: type IV, mixed, and normal. Glyburide lowered plasma glucose and raised plasma insulin concentrations in non-insulin-dependent diabetes mellitus. Patients with type IV hyperlipoproteinemia had higher fasting free insulin concentrations before and after therapy than patients without hyperlipoproteinemia and may have a slightly reduced hypoglycemic response to glyburide therapy. The drug caused a significant reduction in very-low-density lipoprotein cholesterol in patients with non-insulin-dependent diabetes mellitus and type IV hyperlipoproteinemia, along with a variable change in high-density lipoprotein cholesterol, independent of its effect on plasma glucose.

Cholesterol↗
PubMed1977

A study of the human heart as a multiple dipole source. IV. Left ventricular hypertrophy in the presence of right bundle branch block.

This report concerns the task of electrocardiographic (ECG) diagnosis and quantitation of left ventricular hypertrophy (LVH) in patients with right bundle branch block (RBBB). In 36 patients with RBBB the left ventricular mass (LVM) of each patient was independently known from quantitative biplane angiography. Two ECG techniques, standard 12-lead ECG and multiple dipole electrocardiography (MDECG), were evaluated. In diagnosing LVH, the best performance of the several standard ECG criteria was sensitivity = 29%, specificity = 100%, and that of the MDECG was sensitivity = 94%, specificity = 96%. In quantitating LVH, the standard ECG gave a correlation with LVM of r = 46% and a standard error of estimate of 98 g. The corresponding figures for the MDECG were r = 81% and the root mean square prediction error = 64 g. These results confirm other studies showing that the conventional ECG is of only marginal value in the task of diagnosing LVH in the presence of RBBB. In contrast, the MDECG performs well both in this task and that of quantitating LVH. The results provide further support of the accuracy of the model of the cardiac electrical generator and volume conductor used in the MDECG method.

Adolescent↗