Physiological Influences upon the Dynamics of Surface Maps During ST-T: Effects of Varied Heart Rate
The rapid improvement of electronics and of data processing facilitates the use of the complex procedure of mapping of the dynamics of the cardiac electric field for clinical purposes. The interest of physicians in these electrocardiographic mapping investigations increases more and more, because this method belongs to the noninvasive ones and allows frequently repeated overall field recordings without any serious impairment of the patient. This is of importance in the clinical investigation of such diseases, in which a continuous supervision of the cardiac functions of the patient is needed, for example the recent myocardial infarction (Selwyn et al., 1978), or an exact localization of disturbances in the cardiac excitation pathways as for example ventricular preexcitations or conduction defects (Préda et al., 1978). It also improves the diagnoses which utilize follow up studies of the dynamics of the cardiac performance during exercise tests especially in ischaemic heart diseases (Block et al., 1978; Fox, 1979). Empirical methods for this purpose have been developed in the form of the Ecg-ST-T-mapping (Fox et al., 1978).
KeywordsExercise Test Increase Heart Rate Varied Heart Rate Physiological Influence Continuous Supervision
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