Key result
The L/M index derived from color Doppler echocardiography was significantly lower in patients with pseudonormal transmitral flow compared to normal flow (1.55 vs 2.72 x 10^-3; p<0.01).
Why the study?
Does color Doppler echocardiography measuring standardized jet length (L/M) differentiate pseudonormal from normal transmitral flow patterns in patients with ischemic heart disease?
Population
37 patients with ischemic heart diseases who demonstrated a 'normal' transmitral flow pattern
Comparison
Color Doppler echocardiography measuring maximum… vs Conventional Doppler variables
Design
Cross-sectional
Authors
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L/M index may aid differentiation of pseudonormal from normal flow; hypothesis-generating and requires prospective validation before clinical use.
Observational (n=37)
Does color Doppler echocardiography measuring standardized jet length (L/M) differentiate pseudonormal from normal transmitral flow patterns in patients with ischemic heart disease?
Absolute Event Rate: 1.55% vs 2.72%
p-value: p=< 0.01
Color Doppler echocardiography evaluating the ratio of jet length to momentum during atrial contraction can successfully differentiate pseudonormal from normal transmitral flow patterns, unlike conventional Doppler variables.
Imanishi et al. (1996) conducted an observational in Ischemic heart diseases (n=37). Pseudonormalization group (LVEDP ≥ 18 mmHg) vs. Normal group (LVEDP < 18 mmHg) was evaluated on L/M index (maximum color Doppler jet length / simplified jet momentum index) (p=< 0.01). The L/M index derived from color Doppler echocardiography was significantly lower in patients with pseudonormal transmitral flow compared to normal flow (1.55 vs 2.72 x 10^-3; p<0.01).
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