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Biomedical subjects

G Masotti

Publications and source records attributed to G Masotti.

At least 109 records · Page 6Linked to original sources
PubMedDate not supplied

Antihypertensive action of nifedipine: effects on arteries and veins.

Nifedipine is a calcium-channel antagonist with effective antihypertensive activity and has been suggested for the treatment of high blood pressure as an alternative to vasodilators. The aim of this study was to define the acute effect of nifedipine and in particular the dose-effect relationship, effects on veins, influence on adrenergic reflexes, and effectiveness on hypertension according to severity and etiologic type. The effects of nifedipine on blood pressure, heart rate, forearm blood flow, peripheral vascular resistance, orthostatic and cold reflexes, and venous tone were examined in 45 patients with hypertension of different etiologies (essential, renovascular, and renal parenchymal) and different World Health Organization grades. The antihypertensive effect was dose dependent, but a dose of 20 mg has nearly maximal activity with acceptable side effects. The drug acts by lowering peripheral vascular resistance, and this lowering is directly related to baseline values; therefore, the antihypertensive effect increases with severity of the hypertension. Nifedipine had the same effect in all three etiologic groups of hypertension studied. The drug seems to increase venous tone, since it caused venoconstriction when locally injected in hand veins. Nifedipine did not alter adrenergic reflexes induced by both cold application and standing and was well tolerated. In conclusion, the calcium antagonist nifedipine for its characteristics of action, at least in acute administration, seems to be a useful alternative in the treatment of various forms of hypertension.

Adult↗
PubMedDate not supplied

Fasting and post-prandial glycemia and their correlation with glycated hemoglobin in Type 2 diabetes.

OBJECTIVE: The relative contribution of fasting and post-prandial glucose to glycated hemoglobin (HbA1c) is controversial. In the present study, we assessed the relationship with HbA1c of fasting and post-prandial glucose measured in a more naturalistic setting, through home glucose self-monitoring or with a continuous glucose monitoring system (CGM). MATERIALS AND METHODS: A consecutive series of 300 patients with Type 2 diabetes were enrolled in the study, provided that they performed blood glucose self-monitoring. HbA1c and fasting plasma glucose (FPG) were measured at enrolment. RESULTS: Both fasting plasma and capillary glucose showed a significant correlation with HbA1c (r=0.66 and 0.61, respectively; p<0.001). When home glucose monitoring was considered, both mean fasting and post-prandial glucose showed a significant correlation with HbA1c (r=0.71 and 0.73, respectively). In patients in the lower tertile of body mass index (BMI), HbA1c showed a significant correlation at multivariate analysis with post-prandial glucose, but not with fasting glucose. In patients with HbA1c >7%, both fasting and post-prandial glucose showed a significant correlation, after adjustment for age and BMI, with HbA1c (both p<0.01); conversely, in those with HbA1c < or =7%, such a correlation could be observed for fasting (p<0.01), but not for post-prandial glucose. CONCLUSION: In conclusion, both fasting and post-prandial glucose contribute to the determination of HbA1c . Home glucose self-monitoring appears to provide a more accurate assessment of metabolic control than a single plasma glucose measurement in experimental conditions. Fasting glucose could provide a greater contribution to HbA1c in patients with lower HbA1c, while post-prandial glucose seems to play a major role in leaner Type 2 diabetic subjects.

Aged↗
PubMedDate not supplied

Variable effect of comorbidity on the association of chronic cardiac failure with disability in community-dwelling older persons.

The effect of cardiac failure (CF) and comorbidity on disability in older persons was studied in a cross-sectional survey. The whole population aged 65 + years (n=652; 628 eligible) living in a small town near Florence (Italy) was enrolled. Finally, 459 individuals (73.0% of eligible) underwent a multidimensional evaluation. CF was defined as a NYHA II-IV class in the presence of an obviously abnormal ECG. Disability was assessed by the 14-item WHO scale. Comorbid conditions that had a prevalence >5% and might be considered pathophysiologically unrelated to CF were also identified. The univariate association of CF with disability was analyzed. Multivariate associations were estimated as well, by taking simultaneously into account the effect of comorbid conditions that had an independent effect on disability and were considered as either confounders or effect modifiers of that association. Prevalence of CF [6.1% in the whole study population) was higher with advancing age ( >or=75 years: 8.3 versus 65-74 years: 4.5%, odds ratio, OR: 1.93, 95% confidence interval, CI: 1.02-4.18), in the presence of hypertension (OR: 2.87, 95% CI: 1.32-6.23), and among individuals who were living alone (OR: 2.44, 95% CI: 1.10-5.56). CF was associated with a higher prevalence of disability (38.5 versus 19.5% OR 2.67, 95% CI: 1.21-5.92). Comorbidity modified the association of CF with disability following two patterns: while the independent effect of CF on the prevalence of disability was similar in the absence or in the presence of chronic obstructive pulmonary disease, hearing impairment, gastrointestinal tract disease, or osteoarthritis, such effect was much larger in the presence than in the absence of visual impairment, previous stroke, or urinary incontinence. The composite pathophysiological pathways of such different interactions are still to be elucidated.

Journal Article↗
PubMedDate not supplied

[On the mechanism of the formation of traumatic lesions of the larynx: observations on three cases (author's transl)].

The authors, having drawn attention to the rarity of traumatic lesions of the larynx, illustrate three cases mentioning in particular the disproportion between the external and internal lesions, (as has already been pointed out by other authors), and the mechanism of the formation of such lesions. This, in particular, on the strenght of interpretations of slight cutaneous lesions.

Accidents, Traffic↗
PubMedDate not supplied

[High performance thin-layer chromatography in specific blood diagnosis (author's transl)].

Furthering their research into the differentiation of various haemoglobins (both human and animal) with the use of thin layer chromatographic methods, the Authors have applied Kaiser's high performance thin layer chromatography (HPTLC) to the specific diagnosis of blood. Although the method was superior to ascending one-dimensional thin layer chromatography for its sensitivity, Rf reproducibility and much briefer migration times, it did not turn out to be suitable for application to the specific requirements of forensic haematology.

Animals↗