HeartVue
The classical method of analysis of ECG at rest due to its simplicity and ethodological completion remains most acceptable and widely used in all spheres of cardiodiagnosis. However, despite considerable improvement of the modern ECG analysis and development of computer methods of analysis of ECG signals, two problems of analysis of ECG at rest are still actual, namely:
low sensitivity and specificity to ischemic heart disease (IHD) and insufficient sensitivity for individual prognosis estimation of risk after myocardial infarction (MI) or other states endangering life. In recent years the urgency of these problems has been growing as against the background of growing statistic indexes of spreading IHD, the ECG method remains the only means accessible in mass prophylactic medical examination of the population. The existing system of ambulatory and clinic cardiological examination in many cases does not manage to ensure timely eginning of therapeutic and reanimating measures in case of heart attack. Unexpected occurrence of heart pathology in people who before this episode were considered healthy become more often and often. One of the methods of preventing acute cardiological states is using accurate screening ECG technologies for operative and reliable identification of people with a high risk of pathological changes in the myocardium. Such technologies should ensure detailed and frequent control of dynamics of the heart which will make it possible to timely detect symptoms of pathology at the pre-hospital stage or to see development of negative tendencies at the very early stages in hospital treatment.
CardioVisor-06c is designed just for this application. This is the first serial device on the market of modern computer ECG analyzers based not on the analysis of usual ECG characteristics but on technology of calculation and 6 three-dimension visualization of the electromagnetic radiation of the myocardium by parameters of amplitude dispersion of the standard ECG signal from extremities (4 electrodes, Patent DE 199 33 277 A1). In conditions of the infrastructure of cardiological service of the Russian Federation this device is fairly effective for overcoming the above two disadvantages of the ECG method for the following reasons:
1) mean time of examination of one patient does not exceed 1…3 minutes including the time of applying electrodes,
2) the procedure of examination (especially when the patient comes for medical aid for the first time) can be completed without putting off clothes, in sitting position; with a portative set of the instrument examination can be completed right at the place of hospitalization or at the working place in screening examinations,
3) the sensitivity of the device to ischemic changes in the myocardium is not less than 80% with specificity not lower than 63%, 4) t he sensitivity of the instrument to pathological changes with control of dynamics is not less than 95% with specificity not lower than 90%. It is expected that as a result of ambulatory use of CardioVisor-06c in the framework of cardiological service 50% of cardiopathologies from the group of acute and urgent manifestations can come over to the group of controlled manifestations undergoing timely prophylactic therapy. This, in its turn, will increase the effectiveness of the entire cardiological service.
