The DOI matches its Crossref record; 11 of the 12 references it cites were found in a registry or an index.
Interrelation of heart rate and autonomic activity in asymptomatic men with unobstructed coronary arteries. Studies with atrial pacing, adrenaline infusion, and autonomic blockade.
Open accessAbstract
We have extended our observations on asymptomatic men with abnormal resting elec- trocardiograms showing changes indistinguishable from those of myocardial ischaemia but with normal coronary arteriograms.In the present investigation we aimed to separate the effects of heart rate alone from those of the sympathetic nervous system.We therefore studied the effects of atrial pacing alone, pacing and adrenaline infusion combined, pacing after beta-blockade, and pacing after beta-blockade plus atropine.Twenty asymptomatic men, aged 17 to 57, were investigated.All were shown to have unob- structed coronary arteries and normal left ventricular angiograms.Echocardiographic findings were normal.Sixteen had flat or inverted T waves in the lateral leads (designated "T"), two had ST depression (designated "ST"), and two had mixed patterns.T wave abnormalities and, to a lesser extent, ST changes returned to normal or regressed after an overnight rest in hospital.Subsequent atrial pacing to 160/minute reproduced or increased the respective abnormalities.When adrenaline was infused in low doses just sufficient to produce discernible effects on the ST-T segment (between 0-024 and 0*091 ,ug/kg per min) and atrial pacing was repeated, the effect of the latter was enhanced.Both adrenaline and pacing influenced the ST-T segment in the same direction.Intravenous propranolol (0.2 mg/kg) blocked the effect of adrenaline and its synergistic effect with pacing but exerted little if any influence on the effect of pacing alone.Atropine given intravenously after propranolol (0.04 mg/kg) reduced the effect of atrial pacing on the ST-T configuration.Treadmill exercise tests were positive in nine and borderline in one.After beta-blockade (oral oxprenolol), all tests were negative.As beta-blockade did not prevent pacing-induced ST depression but normalised the false positive exercise test, the latter does not appear to be rate related but more probably the result of the direct influence of catecholamines.Isolated T wave changes and ST depression in the resting electrocardiogram differ in that they are influenced both by heart rate and catecholamines acting synergistically.We have reported observations on asymptomatic men and beta-adrenergic blockade.Since changes in heart with abnormal electrocardiograms showing changes rate as well as sympathetic behaviour may be relevant, indistinguishable from those of myocardial ischaemia however, acting either independently or in combina- but with normal coronary arteriograms.1 An altered tion, it seemed appropriate to attempt to evaluate the response to autonomic activity was show,.whereby effect of each separately and the interplay between the these changes could be readily manipulated by meas-two on the electrocardiographic configuration in a ures designed to influence sympathetic activity, such similar group of asymptomatic men. as tranquillity, intravenous infusion of adrenaline,We have accordingly recorded the electrocardiogram during atrial pacing, intravenous adrenaline
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Adrenaline-induced abnormalities of repolarisation could, in theory, predispose to arrhythmias.
“these adrenaline induced abnor- malities of repolarisation could, in theory, predispose to arrhythmias.17”
From Effect of intravenous adrenaline on electrocardiogram, blood pressure, and serum potassium. (1983) · cites this paper as [17]
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Metadata
- Authors
- Taggart, P., Donaldson, R., Green, J., Joseph, S. P., Kelly, H. B., Marcomichelakis, J., Noble, D., & White, J.
- Affiliations
- University of Oxford (GB)
- ORCID
- Venue
- Heart
- Publisher
- BMJ
- Published
- 1982-01-01
- Volume
- 47
- Issue
- 1
- Pages
- 19-25
- ISSN
- 1355-6037 (ISSN-L)
- PMC
- PMC481090
- OpenAlex
- W2005412282
- Cited by
- 18
- References
- 12
- Citations by year
- 2024: 2
- FWCI
- 0.77
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Heart (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Heart Rate Variability and Autonomic Control
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Heart rate and cardiovascular health
- Keywords
- heart rate, autonomic nervous system, atrial pacing, adrenaline infusion, beta-adrenergic blockade, propranolol, atropine, T wave changes, ST-segment depression, resting electrocardiogram, asymptomatic men, catecholamines, exercise testing, sympathetic nervous system, coronary arteries, autonomic blockade
- MeSH terms
- Adolescent, Adult, Atropine, Autonomic Nervous System, Cardiac Pacing, Artificial, Coronary Disease, Coronary Vessels, Electrocardiography, Epinephrine, Exercise Test, Heart Rate, Humans, Male, Middle Aged, Propranolol
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