Characteristics of Myocardial Deformation and Rotation in Subjects With Diastolic Dysfunction Without Diastolic Heart Failure
Korean Circulation Journal
;
: 532-537, 2009.
Artigo
em Inglês
| WPRIM
| ID: wpr-53257
ABSTRACT
BACKGROUND AND OBJECTIVES:
There have been very few pathophysiologic studies on isolated diastolic dysfunction. We hypothesized that the characteristics of isolated diastolic dysfunction would be located, on the clinical continuum, between those of a normal heart and diastolic heart failure. SUBJECTS ANDMETHODS:
We enrolled 102 subjects who had no history of overt symptoms of heart failure and who had a left ventricular ejection fraction of more than 50%. They were examined for myocardial deformation and rotation using the two-dimensional speckle tracking image (2D-STI) technique.RESULTS:
The circumferential strains and radial strain at the apical level (RS(apex)) were related to the ratio of the transmitral early peak velocity over the early diastolic mitral annulus velocity (E/E'). After adjustment for age, the RS(apex) showed a positive relationship with the E/E' ratio; whereas, the circumferential strains did not. Instead, the circumferential strains demonstrated a significant correlation with age. Basal rotation and left ventricular (LV) torsion were also related to age, but had no relationship with the E/E' ratio. However, as the E/E' ratio value increased, systolic mitral annular velocity decreased.CONCLUSION:
Except for the RS(apex), LV myocardial deformation and rotation did not vary with the degree of E/E' ratio elevation when there was no associated diastolic heart failure. Additionally, in clinical situations such as isolated diastolic dysfunction, the advancement of age has a relatively greater influence on characteristics of LV myocardial deformation and rotation rather than on the E/E' ratio.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Entorses e Distensões
/
Volume Sistólico
/
Atletismo
/
Ecocardiografia Doppler
/
Insuficiência Cardíaca Diastólica
/
Coração
/
Insuficiência Cardíaca
Idioma:
Inglês
Revista:
Korean Circulation Journal
Ano de publicação:
2009
Tipo de documento:
Artigo
Similares
MEDLINE
...
LILACS
LIS