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- W1963583560 abstract "Abnormalities in left ventricular diastolic function or filling are considered to be responsible for some of the symptoms in patients with hypertrophic cardiomyopathy. To clarify whether the abnormalities in left ventricular diastolic filling are improved by septal myectomy,13 patients with hypertrophic cardiomyopathy and intracavitary pressure gradient were studied preoperatively and postoperatively by use of pulsed Doppler echocardiography. Peak early diastolic filling velocity (E), the ratio of peak early diastolic filling to peak atrial filling velocities (E/A ratio), and deceleration time were measured from the transmitral flow velocity pattern before and after septal myectomy. Although E and E/A ratio did not change after septal myectomy, deceleration time significantly shortened from 314 ± 72 to 271 ± 53 milliseconds (<i>n</i> = 10; <i>p</i> < 0.05). Further, if seven patients with significant changes in heart rate (greater than 30%) or in the Doppler-determined severity of mitral regurgitation (more than one degree) were excluded (because these parameters may effect E and EIA ratio), there were also significant changes in E (81 ± 21 versus 98 ± 25 cm/sec, <i>p</i> < 0.05) and in E/A ratio (0.84 ± 0.17 versus 1.14 ± 0.33, <i>p</i> < 0.05). Because left ventricular systolic function has been demonstrated to remain constant or to decrease by most measures after septal myectomy, relief of some symptoms may be largely the result of the improvement in diastolic filling suggested by these criteria." @default.
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- W1963583560 date "1990-05-01" @default.
- W1963583560 modified "2023-10-18" @default.
- W1963583560 title "Improvement in Left Ventricular Diastolic Filling by Septal Myectomy in Hypertrophic Cardiomyopathy" @default.
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- W1963583560 doi "https://doi.org/10.1016/s0894-7317(14)80434-3" @default.
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