ABSTRACT
Free-space optics (FSO) can provide cost-effective, high-bandwidth, wireless connections. However, atmospheric turbulence may degrade the performance of FSO links by causing intensity and power scintillations at the receiver. Multicanonical Monte Carlo sampling is used in conjunction with the phase screen method to calculate the statistics, and particularly the probability density function (PDF), of the power fluctuations at an FSO receiver. This allows the efficient calculation of the PDF even for very small values with a limited number of iterations. The obtained PDF can be used to characterize the performance of the system in terms of the error probability.
ABSTRACT
Exercise stress test is the most widely used instrument in the detection of myocardial ischemia. We try to develop a score for objective and subjective symptoms occurring during this investigation. 428 stress tests are registrated, the parameters are documented, investigated according to a logical schema and data processed.
Subject(s)
Electrocardiography/statistics & numerical data , Exercise Test/statistics & numerical data , Myocardial Ischemia/diagnosis , Adult , Aged , Angina Pectoris/classification , Angina Pectoris/diagnosis , Arrhythmias, Cardiac/classification , Arrhythmias, Cardiac/diagnosis , Blood Pressure , Coronary Disease/classification , Coronary Disease/diagnosis , Electrocardiography/classification , Exercise Test/classification , Female , Heart Rate , Humans , Male , Middle Aged , Myocardial Ischemia/classification , Reference Values , Reproducibility of ResultsABSTRACT
From October 1986 to July 31th 1990 343 patients had coronary dilatations (PTCA) at the Landeskrankenhaus Klagenfurt. In total 380 stenoses in the coronary vessels were dilated. In 83% of stenoses "complete revascularization" was obtained. Success rate was 90%.
Subject(s)
Angioplasty, Balloon, Coronary/methods , Coronary Disease/therapy , Adult , Aged , Angioplasty, Balloon, Coronary/adverse effects , Austria , Coronary Artery Bypass , Coronary Disease/mortality , Female , Follow-Up Studies , Humans , Male , Middle Aged , Recurrence , Survival RateABSTRACT
Coronary heart disease has the highest incidence in our society. Practising physicians are often confronted with a lot of data obtained from invasive investigations (heart-catheterization and angiocardiography). The interpretation of cardiologic parameters and their measurements cause difficulties for physicians who are not permanently involved in this matter. It is the aim for this paper to present a logically conclusive protocol and to explain cardiologic catheter-parameters in use and their meaning.
