Published in Puerto Rico health sciences journal
The metabolism of vitamin D3-3H was studied in a small group of controls and subjects with tropical sprue after the oral or intravenous administration of 8 to 10 microCi of D3-3H. The biological half life of D3-3H upon the administration of the isotope by the intravenous route was normal in 2 controls, very low in a subject with tropical sprue who ...
Published in Puerto Rico health sciences journal
Our electrophysiologic findings are summarized in Table 3. In our animal model of chronic myocardial infarction, induced sustained ventricular tachyarrhythmias occur from 3 days to months following the infarction procedure. Isolated tissues removed from the infarcted region in these animals and studied (table: see text) in vitro reveal regions of s...
Published in Puerto Rico health sciences journal
Programmed electrical stimulation has provided a unique new opportunity to evaluate both mechanisms and treatment regimens aimed at preventing ventricular tachyarrhythmias. The variable results that have been reported from different laboratories, undoubtedly are due in part to the differences in programmed electrical stimulation protocols. Although...
Published in Puerto Rico health sciences journal
Our studies have shown that infarcted dogs which exhibit inducible sustained ventricular tachycardia had late potentials and could be distinguished from those with no arrhythmias by the following QRS characteristics. A QRS duration greater than 63 msec and a duration of late activity below 30 microvolts greater than 18 msec. In addition, delayed an...
Published in Puerto Rico health sciences journal
Published in Puerto Rico health sciences journal
Published in Puerto Rico health sciences journal
Recurrent, sustained ventricular tachyarrhythmias unresponsive to medical therapy are associated with a one-year mortality of 70 to 85%. Patients who are susceptible to these reentrant arrhythmias usually have a history of previous myocardial infarction or chronic myocardial ischemic disease. More specifically, these patients demonstrate both anato...
Published in Puerto Rico health sciences journal
Published in Puerto Rico health sciences journal
A novel approach to chemically attenuate cercariae of S. mansoni is presented. The method utilizes the biologically active surface proteins/glycoproteins which are essential for the survival of the organism as a target for inactivation. The inactivation was achieved by reaction with 0.01 M dimethyl adipimidate, dimethyl pimelimidate or dimethyl sub...
Published in Puerto Rico health sciences journal
We have studied the spontaneous interaction with small, inedible objects by group-living Saimiri. Twenty-one animals living in a large outdoor enclosure were presented with a set of 10 novel objects of diverse materials, colors, sizes, and shapes. We have used a sampling technique to record the number of monkeys interacting with each object; qualit...
