کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9970584 1577914 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Outpatient Echocardiographic Assessment of Complex Pulmonary Outflow Stenosis: Doppler Mean Gradient Is Superior to the Maximum Instantaneous Gradient
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی کاردیولوژی و پزشکی قلب و عروق
پیش نمایش صفحه اول مقاله
Outpatient Echocardiographic Assessment of Complex Pulmonary Outflow Stenosis: Doppler Mean Gradient Is Superior to the Maximum Instantaneous Gradient
چکیده انگلیسی
Evaluation of pulmonary outflow obstruction has focused on maximum instantaneous gradient (MIG). However, experience suggests that outpatient Doppler MIG often overstates the degree of stenosis. In this study of 132 patients with complex pulmonary stenosis, the mean Doppler gradient showed superior correlation and agreement with invasive peak-to-peak gradient (PPG) (r = 0.91, bias = −6 mm Hg). Agreement between mean gradient and PPG remained excellent for patients with prosthetic conduits (bias = −4 mm Hg). When PPG was 50 mm Hg more, both mean Doppler gradient and MIG corrected for prevalve velocity provided reasonable estimates of PPG (bias = −13 and +17 mm Hg, respectively). Uncorrected MIG remained significantly greater than PPG (bias = +27 mm Hg). Outpatient MIG consistently overstated subsequent PPG. In unselected patients with conduits or with PPG of 50 mm Hg or less, mean Doppler gradient provided the best prediction of PPG. These data provide a strong argument for the routine use of mean gradients in complex pulmonary stenosis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the American Society of Echocardiography - Volume 18, Issue 11, November 2005, Pages 1143-1148
نویسندگان
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