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Background  There has been a lack of research on further stratification of subjects who have pseudonormal pattern of mitral inflow. The study aim was to clarify 2 different groups with different diastolic function grades among these subjects using lateral tissue Doppler imaging (TDI).    Methods  A total of 122 consecutive subjects showing pseudonormal pattern of mitral inflow (E/A ≥ 1 and septal e’/a’ < 1) without structural abnormality were prospectively recruited. TDI measurements were performed from both septal and lateral mitral annuli.    Results  Study subjects were stratified according to lateral TDI pattern (e’/a’ < 1 [n = 50] versus e’/a’ ≥ 1 [n = 72]). Subjects with lateral e’/a’ < 1 had higher values of left atrial volume index (LAVI) and E/e’ compared to those for lateral e’/a’ ≥ 1 ( p  < 0.001 for each). Among subjects with lateral e’/a’ ≥ 1, only 9.3% of subjects had grade II diastolic dysfunction, whereas among subjects with lateral e’/a’ < 1, majority of subjects (64.1%) had grade II diastolic dysfunction ( p  < 0.001). Multiple linear regression analysis showed that lateral e’/a’ was independently associated with LAVI ( β  = −0.484,  p  < 0.001), even after adjusting for potential confounders including age, sex, body mass index, hypertension and diabetes.    Conclusions  In subjects without structural abnormality showing E/A ≥ 1 and septal e’/a’ < 1, lateral TDI measurement is useful in the assessment of diastolic dysfunction. Lateral e’/a’ ≥ 1 is a valuable indicator of early diastolic dysfunction but not of advanced diastolic dysfunction in this population.

cardiovascular ultrasound

Additional value of lateral tissue Doppler imaging in the assessment of diastolic dysfunction among subjects with pseudonormal pattern of mitral inflow