A program for the processing of multiple-lead exercise ECGs in real time

Falk, Karl-Johan S.; Angelhed, Jan-Erik; Bjurö, T

doi:10.1016/0010-468x(82)90016-2

Cited by 4 publications

(2 citation statements)

References 13 publications

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“…5 on a 10-point graded scale), dyspnoea and leg fatigue. A signal averaged 12-lead electrocardiogram (Falk et al, 1982) was obtained before, during and after the test. The ST-segment amplitude was measured 60 ms after the end of the QRS-complex, with the PQ interval as the isoelectric reference.…”

Section: Exercise Testmentioning

confidence: 99%

Exercise and redistribution thallium‐201 myocardial scintigraphy: changes in distribution qualitatively unaffected by previous infarction

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Bone

Svanet

et al. 1994

Clinical Physiology

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Eighteen patients with stable exertional angina pectoris were investigated by thallium-201 (201Tl) exercise and redistribution single photon emission computed tomography (SPECT) after coronary angiography. Eight of the patients had a previous myocardial infarct. Six patients had single-, eight double- and four triple-vessel disease. An exercise SPECT was acquired 10 min after the administration of isotope, injected 1-2 min before the termination of a symptom-limited exercise test. A redistribution SPECT was recorded 3 h later. 201Tl activity per pixel was compared between the exercise and redistribution SPECT in relative and absolute terms. For each patient there was a good correlation between activity per pixel in the redistribution SPECT and the corresponding pixels in the exercise SPECT (mean correlation coefficient 0.86 +/- 0.08), irrespective of the extent of coronary artery disease or presence of a previous infarction in the pixel region. Relative wash-out correlated to the degree of coronary artery stenosis (r = 0.48), but did not differ between infarcted and non-infarcted myocardial regions. A similar relationship was documented for pixels with visual 'refill' in the redistribution SPECT. This implies that most of the information in the redistribution SPECT was present already in the exercise SPECT. Thus, qualitative information of a similar kind is obtained from images acquired immediately after exercise and after 3-4 h of redistribution.

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Section: Exercise Testmentioning

confidence: 99%

Exercise and redistribution thallium‐201 myocardial scintigraphy: changes in distribution qualitatively unaffected by previous infarction

Grip

Bone

Svanet

et al. 1994

Clinical Physiology

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“…The six chest to head leads and limb leads I and II were digitised at a rate of 500 Hz continuously throughout the test, and an eight channel average complex was calculated and stored on disk every 10 seconds. 9 The startng workload was 30 W and was increased by 10 W per minute until intolerable chest pain, intense fatigue, a decrease in blood pressure, or significant arrhythmia occurred. The electrocardiogram was then recorded during a 10 minute period of rest after exercise.…”

Section: Exercise Testingmentioning

confidence: 99%

Computer aided exercise electrocardiographic testing and coronary arteriography in patients with angina pectoris and with myocardial infarction.

Angelhed¹,

Bjurö²,

Ejdebäck³

et al. 1984

Heart

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sUmmARY A set of electrocardiographic criteria for the diagnosis of coronary artery disease was evaluated in two different groups of patients exmined by computer aided 12 lead exercise electrocardiographic stress testing and coronary arteriography. One group consisted of patients with severe angna pectoris and the other of patients who had suffered a myocardial infarction three years before the study. Angiographically determined categories of patients could be identified with satisfactory precision by the electrocardiographic criteria under test in the patients with angina pectoris but not in those with infarction. A new method of classifying patients on the basis of data from coronary arteriography improved the correlation with ST segment analysis compared with conventional classification.Exercise electrocardiographic testing is commonly used to detect coronary artery disease and also to evaluate the severity of disease and to observe the effect of treatment.1 Several reports suggest that the electrocardiographic response during exercise may correlate with the findings of coronary arteriography.2-4 Results have, however, also shown that exercise electrocardiographic testing poorly identifies patients with coronary artery disease. [5][6][7] Several factors influence the results of such investigations: (a) patient selection; (b) the reference method; (c) the definition of disease by the reference method; and (d) the procedures used in applying a method.The aim of this investigation was to determine whether a set of ST segment amplitude criteria could identify critical coronary lesions in two differently

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Late streptokinase infusion and antithrombotic treatment in myocardial infarction reduce subsequent myocardial ischemia

Grip

Rydén

1991

American Heart Journal

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A program for the processing of multiple-lead exercise ECGs in real time

Cited by 4 publications

References 13 publications

Exercise and redistribution thallium‐201 myocardial scintigraphy: changes in distribution qualitatively unaffected by previous infarction

Exercise and redistribution thallium‐201 myocardial scintigraphy: changes in distribution qualitatively unaffected by previous infarction

Computer aided exercise electrocardiographic testing and coronary arteriography in patients with angina pectoris and with myocardial infarction.

Late streptokinase infusion and antithrombotic treatment in myocardial infarction reduce subsequent myocardial ischemia

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