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- W2324006927 abstract "To study left ventricular diastolic properties in syndrome X, we analyzed transmitral filling dynamics during handgrip exertion. In 14 normal subjects (N), 17 with syndrome X (Syn X), 16 with single-vessel disease (SVD), and 8 with multiple-vessel disease (MVD), transmitral inflow was recorded at baseline and during handgrip (50% of maximal effort for one minute) using pulsed Doppler echocardiography. We measured early diastolic (E) and late atrial (A) inflow velocities, A/E ratio and percent change of A/E from baseline (%A/E). Blood pressure and heart rate increased to the same degree in each group during handgrip. In normal subjects, E did not change with handgrip; A (51 ± 10 vs 54 ±11 cm/sec, P<0.05) and A/E (1.16 ±0.22 vs 1.25 ±0.33, P<0.05) increased minimally. In Syn X subjects, E decreased (51 ± 10 vs 38 ± 10 cm/sec, P<0.0001), A increased (52 ±11 vs 60 ±14 cm/sec, P<0.005), and A/E increased markedly (1.07 ±0.31 vs 1.68 ±0.51, P< 0.0001). The %A/E in Syn X and MVD were significantly larger than that in SVD and N (Syn X: 58 ±29%; MVD: 45 ±25%; SVD: 22 ±21%; N: 8 ±13%). Handgrip-induced changes in diastolic filling in syndrome X and are similar to those in MVD and more marked than in SVD. These changes are consistent with impaired ventricular relaxation and support a generalized left ventricular (LV) abnormality in syndrome X." @default.
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- W2324006927 date "1997-10-01" @default.
- W2324006927 modified "2023-09-23" @default.
- W2324006927 title "Left Ventricular Diastolic Filling Dynamics During Isometric Exertion in Syndrome X Assessed with Doppler Flowmetry" @default.
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- W2324006927 doi "https://doi.org/10.1177/000331979704801004" @default.
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