The electrocardiogram during exercise as recorded by radioelectrocardiography

Clinical and Electrocardiographic Observations of Patients with Ischemic Heart Disease During Multistage Submaximal Exercise

“…The electrocardiograms were analyzed for heart rate and were classified as abnormal according to criteria of Beli.et et al [3] …”

“…Careful analysis of the electrocardiographic abnormalities which appear during the exercise is helpful in establishing the degree of cardiac disability and the severity of ischemic heart disease. The deter mination of the energy expended by the patient at the time of the appearance of abnormal findings provides a reliable and repro ducible measure of the amount and the duration of work which the patient can safely perform and tolerate [3][4][5][6][7][8][9][10][11].…”

Hazards of the Barium Enema Examination as Studied by Electrocardiographic Telemetry: Preliminary Report

“…Interpretations of the radioelectrocardiographic alterations during exercise, first classified in the literature as abnormal (2), have since been modified by the same group (3). Moreover, the ability of such factors as changes in posture (4) and other artifacts during transmission to simulate ischemic myocardial changes has recently been pointed out (5).…”

Ambulatory Electrocardiology

“…in 1949, Holter and Generelli 5 developed a portable apparatus for wireless transmission of biopotential signals using 50 MHz radio waves (Fig. [8][9][10][11] telemetric systems were also used during the space race between the Soviet Union and the United States in the 1950s and 1960s, which allowed the monitoring of physiological signals under extreme conditions where data could not be obtained by other means. Macinnis 6 reported in 1954 the radio transmission of an ecG (radioelectrocardiogram) from a clinical subject with a quality similar to that of a standard non-AecG system.…”