Journal of cardiology
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Journal of cardiology · Mar 1999
Review[Historical perspectives on the mechanism of atrial fibrillation].
A number of experimental studies have been proposed to show that reentry is an important electrophysiological mechanism related to the development of atrial fibrillation. The beginning of the computer era enabled us to analyze the atrial activation during atrial fibrillation. The results of these studies were fascinating and allow for the development of theories and speculations on the mechanism of atrial fibrillation. ⋯ Spiral wave for ventricular fibrillation was also proposed for the atrial activation mechanism during atrial fibrillation in the experimental model. The evidence available at the moment warrants the statement that atrial fibrillation is caused by multiple wavelet reentry. These studies will allow a better understanding of the relative importance of wavelength and structural inhomogeneities in the genesis of atrial fibrillation.
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Journal of cardiology · Mar 1999
Review[The role of angioscopy and intravascular ultrasound imaging in acute coronary syndrome].
Evaluation of the severity of coronary atherosclerosis by intracoronary imaging may be closely relevant with the prevention and treatment of acute coronary syndromes. Coronary angioscopy as one of the innovative methods of imaging and intravascular ultrasound makes the insight visualization of coronary vessel wall and histological recognition possible recently. Yellow plaques rich in lipid materials and covered by thin membrane are more often ruptured than white ones to cause acute coronary syndromes. ⋯ More precise evaluation of plaque histology may be a clue to predict the occurrence of acute coronary syndrome. Intravascular ultrasound is not so useful enough to diagnose thrombosis. In conclusion, the applications of intravascular imaging technologies, such as angioscopy and intravascular ultrasound, may play a critical role in the diagnosis and treatment of acute coronary syndromes.