Diagnostic accuracy of electrocardiography and thoracic radiography in the assessment of left atrial size in cats: Comparison with transthoracic 2-dimensional echocardiography

Karsten E. Schober, Imke Maerz, Eberhard Ludewig, Joshua A Stern

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Background: Left atrial (LA) enlargement (LAE) is a morphologic expression of the severity and chronicity of left ventricular (LV) diastolic dysfunction, volume overload, and increased atrial pressure and has diagnostic, therapeutic, and prognostic importance in cats. The noninvasive gold standard for assessing LA size is 2-dimensional echocardiography (2DE). Hypothesis: ECG and thoracic radiography may be used to predict LAE in cats. Animals: Twenty-one healthy control cats and 31 cats with cardiomyopathy were prospectively studied. Methods: 2DE studies, including determination of the maximum LA dimension (LAD) and area (LAA), were performed prospectively in all cats and compared to the assessment of LA size based on thoracic radiography and indices obtained from a 6-lead ECG. Results obtained from healthy cats were used to generate discrimination limits suggestive of LAE as defined by LAD > 1.57 cm and LAA > 2.75 cm 2. Results: In cats with LAE, P wave duration and PR interval were prolonged and radiographic LA vertebral heart size (LA-VHS) was increased (P <. 05). P wave-related indices had low sensitivity (Se; range, 0,12 to 0.60) but high specificity (Sp; range, 0.81 to 1.00) for the prediction of LAE. Radiographic indices had low Se (range, 0.28 to 0.72) and high Sp (range, 0.74 to 0.95) for the prediction of LAE. Correlation analyses identified correlations between LAA and P wave duration (r = 0.47, P = .003) and LAD and LA-VHS (r = 0.70, P < .001). Conclusion and Clinical Importance: ECG and thoracic radiography are reasonably specific but less sensitive predictors of LAE in cats.

Original languageEnglish (US)
Pages (from-to)709-718
Number of pages10
JournalJournal of Veterinary Internal Medicine
Volume21
Issue number4
DOIs
StatePublished - Jul 2007
Externally publishedYes

Fingerprint

Thoracic Radiography
electrocardiography
echocardiography
chest
radiography
Echocardiography
Electrocardiography
Cats
cats
Atrial Pressure
duration
prediction
cardiomyopathy
Left Ventricular Dysfunction
Cardiomyopathies
gold
heart
therapeutics

Keywords

  • Electrocardiography
  • Hypertrophic cardiomyopathy
  • Left atrium
  • P wave
  • Vertebral heart size

ASJC Scopus subject areas

  • veterinary(all)

Cite this

@article{87fd2258c30b4fdeaf4356aa400657ba,
title = "Diagnostic accuracy of electrocardiography and thoracic radiography in the assessment of left atrial size in cats: Comparison with transthoracic 2-dimensional echocardiography",
abstract = "Background: Left atrial (LA) enlargement (LAE) is a morphologic expression of the severity and chronicity of left ventricular (LV) diastolic dysfunction, volume overload, and increased atrial pressure and has diagnostic, therapeutic, and prognostic importance in cats. The noninvasive gold standard for assessing LA size is 2-dimensional echocardiography (2DE). Hypothesis: ECG and thoracic radiography may be used to predict LAE in cats. Animals: Twenty-one healthy control cats and 31 cats with cardiomyopathy were prospectively studied. Methods: 2DE studies, including determination of the maximum LA dimension (LAD) and area (LAA), were performed prospectively in all cats and compared to the assessment of LA size based on thoracic radiography and indices obtained from a 6-lead ECG. Results obtained from healthy cats were used to generate discrimination limits suggestive of LAE as defined by LAD > 1.57 cm and LAA > 2.75 cm 2. Results: In cats with LAE, P wave duration and PR interval were prolonged and radiographic LA vertebral heart size (LA-VHS) was increased (P <. 05). P wave-related indices had low sensitivity (Se; range, 0,12 to 0.60) but high specificity (Sp; range, 0.81 to 1.00) for the prediction of LAE. Radiographic indices had low Se (range, 0.28 to 0.72) and high Sp (range, 0.74 to 0.95) for the prediction of LAE. Correlation analyses identified correlations between LAA and P wave duration (r = 0.47, P = .003) and LAD and LA-VHS (r = 0.70, P < .001). Conclusion and Clinical Importance: ECG and thoracic radiography are reasonably specific but less sensitive predictors of LAE in cats.",
keywords = "Electrocardiography, Hypertrophic cardiomyopathy, Left atrium, P wave, Vertebral heart size",
author = "Schober, {Karsten E.} and Imke Maerz and Eberhard Ludewig and Stern, {Joshua A}",
year = "2007",
month = "7",
doi = "10.1892/0891-6640(2007)21[709:DAOEAT]2.0.CO;2",
language = "English (US)",
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pages = "709--718",
journal = "Journal of Veterinary Internal Medicine",
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TY - JOUR

T1 - Diagnostic accuracy of electrocardiography and thoracic radiography in the assessment of left atrial size in cats

T2 - Comparison with transthoracic 2-dimensional echocardiography

AU - Schober, Karsten E.

AU - Maerz, Imke

AU - Ludewig, Eberhard

AU - Stern, Joshua A

PY - 2007/7

Y1 - 2007/7

N2 - Background: Left atrial (LA) enlargement (LAE) is a morphologic expression of the severity and chronicity of left ventricular (LV) diastolic dysfunction, volume overload, and increased atrial pressure and has diagnostic, therapeutic, and prognostic importance in cats. The noninvasive gold standard for assessing LA size is 2-dimensional echocardiography (2DE). Hypothesis: ECG and thoracic radiography may be used to predict LAE in cats. Animals: Twenty-one healthy control cats and 31 cats with cardiomyopathy were prospectively studied. Methods: 2DE studies, including determination of the maximum LA dimension (LAD) and area (LAA), were performed prospectively in all cats and compared to the assessment of LA size based on thoracic radiography and indices obtained from a 6-lead ECG. Results obtained from healthy cats were used to generate discrimination limits suggestive of LAE as defined by LAD > 1.57 cm and LAA > 2.75 cm 2. Results: In cats with LAE, P wave duration and PR interval were prolonged and radiographic LA vertebral heart size (LA-VHS) was increased (P <. 05). P wave-related indices had low sensitivity (Se; range, 0,12 to 0.60) but high specificity (Sp; range, 0.81 to 1.00) for the prediction of LAE. Radiographic indices had low Se (range, 0.28 to 0.72) and high Sp (range, 0.74 to 0.95) for the prediction of LAE. Correlation analyses identified correlations between LAA and P wave duration (r = 0.47, P = .003) and LAD and LA-VHS (r = 0.70, P < .001). Conclusion and Clinical Importance: ECG and thoracic radiography are reasonably specific but less sensitive predictors of LAE in cats.

AB - Background: Left atrial (LA) enlargement (LAE) is a morphologic expression of the severity and chronicity of left ventricular (LV) diastolic dysfunction, volume overload, and increased atrial pressure and has diagnostic, therapeutic, and prognostic importance in cats. The noninvasive gold standard for assessing LA size is 2-dimensional echocardiography (2DE). Hypothesis: ECG and thoracic radiography may be used to predict LAE in cats. Animals: Twenty-one healthy control cats and 31 cats with cardiomyopathy were prospectively studied. Methods: 2DE studies, including determination of the maximum LA dimension (LAD) and area (LAA), were performed prospectively in all cats and compared to the assessment of LA size based on thoracic radiography and indices obtained from a 6-lead ECG. Results obtained from healthy cats were used to generate discrimination limits suggestive of LAE as defined by LAD > 1.57 cm and LAA > 2.75 cm 2. Results: In cats with LAE, P wave duration and PR interval were prolonged and radiographic LA vertebral heart size (LA-VHS) was increased (P <. 05). P wave-related indices had low sensitivity (Se; range, 0,12 to 0.60) but high specificity (Sp; range, 0.81 to 1.00) for the prediction of LAE. Radiographic indices had low Se (range, 0.28 to 0.72) and high Sp (range, 0.74 to 0.95) for the prediction of LAE. Correlation analyses identified correlations between LAA and P wave duration (r = 0.47, P = .003) and LAD and LA-VHS (r = 0.70, P < .001). Conclusion and Clinical Importance: ECG and thoracic radiography are reasonably specific but less sensitive predictors of LAE in cats.

KW - Electrocardiography

KW - Hypertrophic cardiomyopathy

KW - Left atrium

KW - P wave

KW - Vertebral heart size

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