present research was for study on parasitic infections of domestic ruminants in golestan province. 234 samples of the gastrointestinal tracts contents, 260 livers, 180 lungs, 350 hearts and muscles, 300 abdominal cavities and 100 eyes for infection to helminthes, 800 blood samples for protozoa and external coats of 700 animals were examined for arthropoda. results showed that 19.74% of sheep ga...

AIM Isolated papillary muscles and enzymatically dissociated myocytes of guinea-pig hearts are routinely used for experimental cardiac research. The aim of our study is to investigate adult mammalian ventricular slices as an alternative preparation. METHOD Vibratome cut ventricular slices (350 microm thick) were examined histologically and with 2-photon microscopy for fibre orientation. Intra...

Cardiac hypertrophy is a characteristic change that occurs in senescence. Muscles from senescent as compared to mature hearts also demonstrate functional alterations that are similar to the alterations found in muscles from experimentally hypertrophied hearts. Thus, an attractive hypothesis is that functional alterations in senescent muscles are related to the underlying hypertrophy. To test th...

Cardiac hypertrophy is a characteristic change that occurs in senescence. Muscles from senescent as compared to mature hearts also demonstrate functional alterations that are similar to the alterations found in muscles from experimentally hypertrophied hearts. Thus, an attractive hypothesis is that functional alterations in senescent muscles are related to the underlying hypertrophy. To test th...

The aim of this study was to determine whether the impairment of contractility in the myocardium obtained from hypertrophied and failing hearts is due to a decreased store of energy and whether an imbalance exists between energy production and energy utilization in these hearts in vivo. Right ventricular hypertrophy and right ventricular failure were produced in cats by constriction of the main...

Vascular endothelium has been shown to modify the contractile characteristics of vascular smooth muscle, and endocardial endothelium has been shown to modify the contractile characteristics of adjacent myocardium. In this study, whether vascular endothelium also modifies the contractile characteristics of adjacent myocardium and whether these effects are additive to those of endocardial endothe...

Recent advances and refinements in mitral valve surgery as well interventional procedures have revived the interest disparity morphology morphometry of papillary muscles valve. Study was taken up with an effort to extend concepts previously presented on Papillary were studied 320 fresh autopsied adult normal hearts. With varying number muscle bellies. Anterolateral (ALPM) posteromedial (PMPM) g...

After eliminating vascular rigor, perfusing human hearts with kerosene under pressure postmortem gives values for coronary flow which seem an index of the maximum possible flow during life. This is 3.1 cc. per gm. per minute at 100 mm. Hg in normal men under 40. It is 35 per cent lower in the hearts of those 60 to 80 years old, and also falls in hypertrophied hearts. In old people it is 30 per ...

The mechanical properties of trabecular muscles from the hearts of 77 rats subjected to aortic arch constriction were compared with those from 77 unoperated and sham-operated control animals at 1, 3, 7, 14, and 28 days after operation. Significant hypertrophy, as evidenced by an increase in left ventricle to body weight ratio, was first seen at three days ( P < 0 . 0 2 ) , reached a maximum of ...

The mechanical properties of trabecular muscles from the hearts of 77 rats subjected to aortic arch constriction were compared with those from 77 unoperated and sham-operated control animals at 1, 3, 7, 14, and 28 days after operation. Significant hypertrophy, as evidenced by an increase in left ventricle to body weight ratio, was first seen at three days ( P < 0 . 0 2 ) , reached a maximum of ...