Comparison of the arrhythmogenic substrate between men and women with nonischemic cardiomyopathy

Cardiomyopathies (CMP) are related with scarring tissue due to fibrotic and disarrangement of myocardial fibers that promote an slowed conduction and substrate for sustained reentrant ventricular arrhythmias. Sometimes, CMP can be associated with ventricular extrasystoles but uncommonly originated from scarring tissue. The case report show a patient with nonischemic CMP, frequents premature ventricular contractions and sustained ventricular tachycardia submitted to catheter ablation.

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Characterization of the Arrhythmogenic Substrate in Ischemic and Nonischemic Cardiomyopathy

Journal of the American College of Cardiology ◽

10.1016/j.jacc.2010.01.041 ◽

2010 ◽

Vol 55 (21) ◽

pp. 2355-2365 ◽

Cited By ~ 165

Author(s):

Shiro Nakahara ◽

Roderick Tung ◽

Rafael J. Ramirez ◽

Yoav Michowitz ◽

Marmar Vaseghi ◽

...

Keyword(s):

Nonischemic Cardiomyopathy ◽

Arrhythmogenic Substrate

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Ultrastructural comparison of prolactin adenomas of pituitary in men and women

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100103796 ◽

1988 ◽

Vol 46 ◽

pp. 346-347

Author(s):

R.C. Caughey ◽

U.P. Kalyan-Raman

Keyword(s):

Endoplasmic Reticulum ◽

Electron Microscope ◽

Phosphate Buffer ◽

Pituitary Adenomas ◽

Osmium Tetroxide ◽

Secretory Granules ◽

Uranyl Acetate ◽

En Bloc ◽

Men And Women ◽

Transmission Electron

Prolactin producing pituitary adenomas are ultrastructurally characterized by secretory granules varying in size (150-300nm), abundance of endoplasmic reticulum, and misplaced exocytosis. They are also subclassified as sparsely or densely granulated according to the amount of granules present. The hormone levels in men and women vary, being higher in men; so also the symptoms vary between both sexes. In order to understand this variation, we studied 21 prolactin producing pituitary adenomas by transmission electron microscope. This was out of a total of 80 pituitary adenomas. There were 6 men and 15 women in this group of 21 prolactinomas.All of the pituitary adenomas were fixed in 2.5% glutaraldehyde, rinsed in Millonig's phosphate buffer, and post fixed with 1% osmium tetroxide. They were then en bloc stained with 0.5% uranyl acetate, rinsed with Walpole's non-phosphate buffer, dehydrated with graded series of ethanols and embedded with Epon 812 epoxy resin.

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Race Difference in Auditory Sensitivity

Journal of Speech and Hearing Research ◽

10.1044/jshr.0704.389 ◽

1964 ◽

Vol 7 (4) ◽

pp. 389-393 ◽

Cited By ~ 3

Author(s):

David C. Shepherd ◽

Robert Goldstein ◽

Benjamin Rosenblüt

Keyword(s):

White Women ◽

White Men ◽

Sensitivity Study ◽

Auditory Sensitivity ◽

Race Difference ◽

Men And Women ◽

Auditory Thresholds ◽

Békésy Audiometry ◽

Method Of Adjustment ◽

Better Than

Two separate studies investigated race and sex differences in normal auditory sensitivity. Study I measured thresholds at 500, 1000, and 2000 cps of 23 white men, 26 white women, 21 negro men, and 24 negro women using the method of limits. In Study II thresholds of 10 white men, 10 white women, 10 negro men, and 10 negro women were measured at 1000 cps using four different stimulus conditions and the method of adjustment by means of Bekesy audiometry. Results indicated that the white men and women in Study I heard significantly better than their negro counterparts at 1000 and 2000 cps. There were no significant differences between the average thresholds measured at 1000 cps of the white and negro men in Study II. White women produced better auditory thresholds with three stimulus conditions and significantly more sensitive thresholds with the slow pulsed stimulus than did the negro women in Study II.

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