Echocardiographic Evaluation of Regional Wall Motion Nonuniformity and Phase Difference in Asymmetric Septal Hypertrophy
Korean Circulation Journal
;
: 254-260, 1992.
Artigo
em Coreano
| WPRIM
| ID: wpr-221011
ABSTRACT
BACKGROUND:
A regional wall motion nonuniformity and a phase difference between LV posterior wall motion and transmitral flow are present during normal rapid filling period and are thought to be an evidence for involvement of ventricular restoring forces. To assess the role of nonuniformity on diastolic funtional impairment of asymmetric septal hypertrophy(ASH), the time relations between left ventricular regional wall motions and filling velocity were studied.METHOD:
We measured the time intervals from A2 to peak rate of LV posterior wall(short axis) thinning(A2-(-)dpw/dt), peak rate of medial mitral annulus (long axis dimension) lengthening(A2-dL/dt) and peak mitral flow(A2-E) by M-mode and Doppler echocardiography.Result:
In ASH patients, A2-(-)dpw/dt(106+/-6msec, mean SE) and the regional wall motion nonuniformity((-)dpw/dt-dL/dt, 89+/-11msec, mean SE) were increased significantly when compared with normal control values(88+/-4, 28+/-5msec, mean SE, p<0.01,respectively).In normal controls, peak mitral flow velocity lagged peak rate of regional wall motion, so the phase differences were present((-)dpw/dt-E71+/-8msec, dL/dt-E44+/-6msec). In ASH patients, (-)dpw/dt-E was present(90+/-16msec) but dL/dt-E was not present or reversed(-21+/-18 msec). So these chacteristic phase differences were disturbed.CONCLUSION:
These data suggested that the relaxation nonuniformity of regional wall motion in ASH may act as an energy dissipating factor of restoring forces during rapid filling period.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Relaxamento
/
Vértebra Cervical Áxis
/
Cardiomiopatia Hipertrófica
/
Ecocardiografia
/
Ecocardiografia Doppler
Limite:
Humanos
Idioma:
Coreano
Revista:
Korean Circulation Journal
Ano de publicação:
1992
Tipo de documento:
Artigo
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