Assessment of Left Atrial Work During Acute Coronary Occlusion.
Coronary occlusion
Left atrial function
Left atrial work
Pressure–strain loop
Speckle tracking echocardiography
Stroke volume
Journal
Ultrasound in medicine & biology
ISSN: 1879-291X
Titre abrégé: Ultrasound Med Biol
Pays: England
ID NLM: 0410553
Informations de publication
Date de publication:
03 2019
03 2019
Historique:
received:
19
09
2018
revised:
05
11
2018
accepted:
19
11
2018
pubmed:
9
1
2019
medline:
18
12
2019
entrez:
9
1
2019
Statut:
ppublish
Résumé
Left atrial (LA) work can be measured through speckle tracking echocardiography by calculating LA pressure-strain loop area, which includes two distinct phases of active contraction/relaxation (A-work) and passive dilation/emptying (V-work). Echocardiographic and hemodynamic data were acquired at baseline and during occlusions of left anterior descending (LAD: n = 7) and left circumflex (LCx: n = 9) coronary arteries in dogs. Left ventricular (LV) circumferential strain was decreased and mean LA pressure was increased in both occlusions. Doppler-derived stroke volume was maintained during LAD occlusion, but it decreased during LCx occlusion. A-work increased during LAD occlusion, but it did not change during LCx occlusion. V-work decreased during LCx occlusion more than during LAD occlusion. The compensatory mechanism of LA function was limited during LCx occlusion, but this occurred during LAD occlusion. This study provided insight into a role of LA function in variable hemodynamic consequences in acute myocardial infarction.
Identifiants
pubmed: 30616910
pii: S0301-5629(18)30517-9
doi: 10.1016/j.ultrasmedbio.2018.11.008
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
749-757Informations de copyright
Copyright © 2018 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved.