منابع مشابه
Mechanisms of the dynamics of reentry in a fibrillating myocardium. Developing a genes-to-rotors paradigm.
Because the myocardium was considered to behave structurally as a continuous medium, for many years attention focused on spatial variations in the membrane properties, which allow some cells to recover excitability faster as the mechanism for reentry.1 This mechanism still holds its place as a major underlying cause of many arrhythmias; eg, the long-QT syndrome.2 In the early 1980s, a second ge...
متن کاملFocus, reentry, or "focal" reentry?
THE QUESTION WHETHER tachyarrhythmias are caused by enhanced impulse formation (“focus”) or by reentrant excitation (“reentry”) has been the subject of debate for more than a century. In 1887 McWilliam (12) was the first to suggest that disturbances in impulse propagation could be responsible for fibrillation, and he clearly envisaged the possibility that myocardial fibers could be reexcited as...
متن کاملQuantum Rotors and Their Symmetries
Quantum rotors have been extensively studied in the past and turned out to be powerful theoretical tools in exploring the microscopic symmetries of the examined objects, but the variety of possibilities that their theory offers has been explored mainly in molecular physics. Nuclear physics applications, although numerous, have been primarily limited to the quantum Hamiltonians corresponding to ...
متن کاملMapping Reentry
• Small-circuit reentry (microreentry) in which extremely slow conduction in a focal area sustains the reentry also presents with centrifugal activation. Unlike automaticity, however, the local bipolar electrograms at the site of the apparent focal source are fragmented and abnormal with microreentry. • When mapping 1 chamber, say the right atrium, but a macroreentry circuit is located within t...
متن کاملMacroscopic Rotors and Gravitational Effects
-Astronomical bodies have, i n the pas t , provided e s s e n t i a l l y t h e only macroscopic b a s i s f o r s t u d i e s of g r a v i t a t i o n by means of r o t a t i o n s . Now new technology provides the p o s s i b i l i t y t h a t laboratory r o t o r s may be made more p r e c i s e than astronomical ones. This a r t i c l e surveys t h e proper t i es of some of both types of r...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: American Journal of Biomedical Science & Research
سال: 2019
ISSN: 2642-1747
DOI: 10.34297/ajbsr.2019.01.000535