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2.4 - General Principles of Performing and Interpretation of Electrocardiography Results
from Section 2 - Diagnosis, Assessment, Investigation, Monitoring and Data Interpretation
- By Kyron Chambers
Edited by Ned Gilbert-Kawai, The Royal Liverpool Hospital, Debashish Dutta, Princess Alexandra Hospital NHS Trust, Harlow, Carl Waldmann, Royal Berkshire Hospital, Reading
Book:

Intensive Care Medicine

Published online:

27 July 2023

Print publication:

01 December 2021, pp 29-33
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Summary

Key Learning Points
1. ECGs can be used for monitoring or diagnostic purposes.
2. Classically, in anaesthesia and the intensive care unit, a three-lead configuration is utilised.
3. The cardiac axis describes the summation of myocardial electrical potentials.
4. Classical ECG changes are described for electrolyte abnormalities.
5. The QT interval is dependent on the heart rate, for as the rate increases, the period for diastole decreases.

Activation delay-induced mechanical dyssynchrony in single-ventricle heart disease
Daniel Forsha, Niels Risum, Piers Barker
Journal:

Cardiology in the Young / Volume 27 / Issue 7 / September 2017

Published online by Cambridge University Press:

09 June 2017, pp. 1390-1391
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We present the case of an infant with a single functional ventricle who developed ventricular dysfunction and heart failure due to an electrical activation delay and dyssynchrony. Earlier recognition of this potentially reversible aetiology may have changed her poor outcome.

Left bundle branch block in infants with dilated cardiomyopathy conveys a poor prognosis
James F. Cnota, Ricardo A. Samson
Journal:

Cardiology in the Young / Volume 9 / Issue 1 / January 1999

Published online by Cambridge University Press:

19 August 2008, pp. 55-57
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We describe three infants < 3 months of age seen consecutively with dilated cardiomyopathy who presented initially with left bundle branch block on the surface 12-lead electrocardiogram. Each infant subsequently had a poor outcome: two died and one required heart transplantation. These results suggest that the presence of left bundle branch block on the 12-lead electrocardiogram conveys a poor prognosis in infants with dilated cardiomyopathy.

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3 results

2.4 - General Principles of Performing and Interpretation of Electrocardiography Results

Summary

Activation delay-induced mechanical dyssynchrony in single-ventricle heart disease

Left bundle branch block in infants with dilated cardiomyopathy conveys a poor prognosis