Miguel A. Becerra

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1. The reversible cholinesterase inhibitor, tacrine (THA) was examined against the contractions of rat duodenum to acetylcholine and carbachol (cholinesterase resistant). 2. Tacrine (10(-6) M) showed a similar behaviour to physostigmine (10(-6) M), changing the characters of the concentration-response curve to Ach. The contractual responses were shifted to(More)
This paper presents an automatic detection system for the classification of phonocardiographic (PCG) signals using 4 standard auscultation areas (one of each cardiac valve) for heart murmur diagnosis. The database of 4-area PCG records belongs to the National University of Colombia. A set of 50 individuals were labeled as normal, while 98 were labeled as(More)
Atrial fibrillation (AF) is the most common cardiac arrhythmia. Catheter ablation has become the main therapeutic strategy for the treatment of paroxysmal AF, however, results in permanent AF are not completely satisfactory; complex ablation patterns are needed, thus it is of great interest to look for an ideal pattern with a minimum number of lines.(More)
  • Miguel A Becerra, Juan Murillo-Escobar, Laura C Palacio, Catalina Tobón Zuluaga
  • 2014
Atrial fibrillation (AF) is the most common arrhythmia in clinical practice. Recently, a mechanism for maintaining the AF which consists of one or more rotors activating the tissue at high frequency has been proposed. Ablation is one of the treatments for AF whose effectiveness could depend on the localization of the rotor tip. In a previous research, the(More)
2 Preface These proceedings contain the student papers presented as final projects for the Complex Adaptive Systems class (CAP 6675) that I taught at the University of Central Florida the Fall of 2012. All papers in this collection present original research in the area of Complex Adaptive Systems developed during the course of this class. Abstract—Phasor(More)
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