Contribuiçäo ao estudo da vascularizaçäo arterial do testículo em jumentos da raça Pega / Contribution to the study of the arterial vascularization of the testicles in donkey of the Pega race

Estudou-se o comportamento da artéria testicular e seus ramos, bem como o número e distribuiçäo dos vasos penetrantes, em 30 pares de testículos de jumentos da raça pega, adultos e procedentes de várias regiöes do Estado de Minas Gerais, mediante a análise de esquemas de modelos obtidos por corrosäo após injeçäo de acetato de "vinyl". Observou-se que nestes animais essa artéria oferece quatro arranjos vasculares diferentes, de acordo com sua divisäo com predomínio de um ou outro dos vasos resultantes na irrigaçäo do órgäo. Quanto à distribuiçäo dos vasos penetrantes, por quadrante, em mediana, faz-se de maneira que nos testículos direitos o quadrante mais povoado é o craniomedial (17,0), sendo seguido pelos quadrantes caudomedial e craniolateral (15,5) e caudolateral (15,0). Por outro lado, nos testículos esquerdos o quadrante caudolateral mostra o maior número de vasos penetrantes (18,5), seguido pelos quadrantes craniolateral (17,0), craniomedial (16,0) e caudomedial (14,0). Identificou-se a presença de anastomoses que ocorrem entre a artéria testicular e seus ramos ou entre os diferentes colaterais cedidos pela própria artéria. Relativamente ao número total de vasos penetrantes, encontrou-se em mediana, 66,5 e 66,0 vasos para os testículos direitos e esquerdos, respectivamente, o que estatisticamente näo é significante ao nível de alfa=0,05, quando comparamos o número de vasos penetrantes dos testículos direitos e esquerdos

Left ventricular hypertrophy is more marked in salt-sensitive than in salt-resistant hypertensive patients.

Besides the duration and severity of hypertension, several other factors have been shown to be related to left ventricular hypertrophy (LVH) in essential hypertension. The present study was conducted to examine the influence of salt sensitivity on LVH. Fifteen essential hypertensive ambulatory patients were submitted to a low-salt (30 mEq of Na/day for 7 days) and a high-salt (200 mEq of Na/day for 7 days) diet after 12 weeks on placebo. Daily urine collection was obtained during the whole study. After the placebo period, all patients were submitted to a complete clinical and laboratory investigation that included an echocardiogram (M-mode and two-dimensional). Five patients were salt-sensitive (mean blood pressure (BP) increase from the seventh day of the low- to the seventh day of the high-salt diet greater than 10%). No differences in weight, sex ratio, and duration of hypertension were obtained between salt-sensitive and -resistant patients. The initial BP was higher in the salt-sensitive patients. However, the difference was small and without statistical significance. The left ventricular weight was higher in the salt-sensitive than in salt-resistant patients (148 +/- 51 vs. 109 +/- 32 g/m2, p less than 0.05). The left ventricular end-diastolic diameter was also higher in the salt-sensitive patients (50 +/- 10 vs. 43 +/- 6 mm, p less than 0.05). The interventricular septum and posterior wall thicknesses were higher in salt-sensitive patients, although they did not reach statistical significance. In conclusion, salt-sensitive essential hypertensive patients are at a higher risk to develop LVH.