Biomedical subjects

H Reinhard

Publications and source records attributed to H Reinhard.

3 recordsLinked to original sources

PubMed1978

An effective morphometric method for electron microscopic studies on papillary muscles.

Morphometry was performed on the left ventricular posterior papillary muscles of seven Wistar rats. The volume densities of myocardial cells, interstitial space, myocardial nuclei, sarcoplasm, mitochondria, myofibrils, ground substance and T tubules, and the surface densities of myocardial cells, mitochondrial membranes and T tubules, were calculated. Though only 1 ultrathin section per animal was evaluated the low standard errors of the means indicate that the method described here will be adequate in most experimental studies. Due to the anisotropy of the surfaces within myocardial cells, the papillary muscles were cut at an angle of 32.4 degrees to their longitudinal axis. This angle is derived from an equation published by Whitehouse (1974). The procedure to correct the loss of cristal membrane images from oblique sectioning is discussed.

Animals↗

PubMed1977

[Tryptic pancreatitis in small-cell bronchial carcinoma (author's transl)].

In two cases of typical small-cell bronchial carcinoma (one of them peripheral, small and clinically not diagnosed) destructive parenchylmal metastases in the pancreas, carcinomatous lymphoangiosis and infiltration of the larger excretory ducts by tumour cells were demonstrated. In both the clinical course was dominated by tryptic pancreatitis with treatment-refractory hypokalaemia. Since pancreatic metastases occur in about 10% of bronchial carcinomas, tryptic pancreatitis is, however, only rarely observed. It is, therefore, likely that autodigestion occurs only if in addition to parenchymal destruction by the metastases there are other factors. These may be blockage of lymphatic flow by carcinomatous lymphangiosis and duct stenosis by tumour infiltration of the walls. Hypercorticism due to ectopic ACTH production by the small-cell carcinoma may also be factor, but is without proof.

Carcinoma, Small Cell↗

PubMedDate not supplied

[Experimental visualization of the ventricular conduction system of the heart intra vitam (author's transl)].

The in-vivo tolerability of an in vitro in cow, calf and sheep hearts developed method for radiologic visualization of the left ventricular conduction system is tested in four animal experiments. The clinical in-vivo tolerability could be demonstrated on principle; however, it is to accent that hypertonic X-ray contrast dyes may be the cause of morphological changes in the micro- and ultrastructures of the specialised musculature of unknown dignity.

Animals↗