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The hydration reaction between water and cement governs both the rate of strength gain in fresh concrete and also the final strength of hardened concrete. These strength properties are typically assessed by casting small samples (often cubes) taken from the fresh concrete and conducting destructive strength tests at selected days after casting.
To identify, survey and review randomized controlled studies of the use of complementary and alternative medicine (CAM) for obstetric treatment or health promotion.The MEDLINE database was searched to identify randomized controlled trials of CAM treatment and therapies in obstetrics. Studies examining modalities for treatment or improvement of health status were reviewed.Fifty-four articles assessing...
To determine if the characteristics of atrial tachycardias (AT) differ in patients with and without structural heart disease (SHD), we analyzed data from 47 consecutive patients undergoing successful ablation of 58 distinct ATs. Of the 20 pts with SHD, 2 had congenital heart disease, 4 coronary artery disease, 5 valvular heart disease, 5 hypertensive heart disease, and 4 non-ischemic cardiomyopathy...
We used a novel magnetic catheter tracking system with precise spatial localization (Biosense) to map Koch's triangle and direct slow pathway ablation in 10 pts with typical atrioventricular nodal reentry (AVNRT). Mapping and ablation were performed in sinus rhythm. The area over which His potentials were recorded was tagged, as were the borders of the coronary sinus (CS) os. The area of Koch's...
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