myocardial deformation indices in patients with significant aortic regurgitation: a strain rate imaging study
نویسندگان
چکیده
conclusions our results demonstrated the ability of pw-tdi and s/sr modalities in detection of the early subclinical abnormalities in asymptomatic patients with significant chronic ar. results ar group had significantly increased lv end systolic and end diastolic volumes, interventricular septum and posterior wall thickness compared to controls. in ar, sm and em of septal wall, sm of lateral wall; s and sr of both septal and lateral walls were significantly decreased while mpi were significantly increased compared to healthy participants. objective our aim was to study the subclinical left ventricular (lv) dysfunction, by novel echocardiographic methods, myocardial deformation indices in patients with asymptomatic, and significant aortic regurgitation (ar). patients and methods standard echocardiogram and complementary tissue doppler imaging (tdi) and doppler based strain and strain rate (s/sr) imaging were performed in 44 asymptomatic patients with pure and significant ar and ejection fraction (ef) more than 50% (mean age:49.9 ± 17.2 years, 50% male) and 20 healthy participants (mean age: 47.3 ± 13.8 years, 65% male). in addition to tdi velocities to investigate the lv longitudinal deformation, peak systolic s and sr were measured at septal, lateral and posterior walls. the lv modified myocardial performance index (mpi) or tie index also were calculated via tdi study. background early detection of myocardial contractility disturbances in patients with asymptomatic moderate to severe aortic regurgitation (ar) leads to the early operative intervention early enough to prevent from poor postoperative heart failure (hf) prognosis.
منابع مشابه
Myocardial deformation abnormalities in patients with aortic regurgitation: a strain rate imaging study.
AIMS Early left ventricular (LV) dysfunction in asymptomatic patients with severe aortic regurgitation (AR) may go undetected due to the lack of a sufficiently sensitive diagnostic tool. Ultrasonic strain/strain rate (S/SR) imaging should now provide such sensitivity in detecting early dysfunction in regional LV systolic deformation. The aim of this study was to understand and define the change...
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عنوان ژورنال:
archives of cardiovascular imagingجلد ۱، شماره ۱، صفحات ۱۳-۸
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