Background: The role of tissue Doppler imaging (TDI) in the assessment of diastolic dysfunction in elderly patients seen in echocardiographic practice is poorly defined.
Objective: The aim of this study was to investigate the prevalence of diastolic dysfunction in a cohort of elderly patients referred to an echocardiographic examination for routine clinical indications and to compare the findings obtained by conventional Doppler with those obtained by TDI.
Methods: A total of 457 elderly patients with preserved left ventricular (LV) systolic function (mean age 73±5 years, 45% men, 76% with hypertension) underwent a comprehensive echo-Doppler examination; diastolic dysfunction was defined by the following conventional and TDI criteria: E/A ratio (ratio between transmitral peak velocity of E and A waves) <0.7 or >1.5 and lateral annular early diastolic peak velocity (Ei) <8 cm/sec, respectively.
Results: Diastolic dysfunction was present in 130 patients (28.4%) according to the conventional Doppler criterion, namely 119 (26.0%) because of E/A <0.7 and 11 because of E/A >1.5. A higher proportion of participants (60.1%) had LV diastolic dysfunction according to TDI. Notably, more than one-half of the patients with ‘normal’ diastolic function by conventional criterion exhibited an abnormal Ei value.
Conclusions: A large proportion of elderly patients with normal E/A ratios may have more subtle alterations in LV diastolic mechanics characterized by a reduced annular motion velocity. Thus, evaluation of diastolic function by the simple E/Aratio may markedly underestimate diastolic abnormalities. This finding supports the view that diastolic function should be routinely assessed by comprehensive Doppler methodologies including both conventional and tissue Doppler measurements in order to improve the management of elderly patients seen in clinical practice.
conventional Doppler tissue Doppler imaging diastolic function elderly
No sources of funding were used to assist in the preparation of this article. The authors have no conflicts of interest that are directly relevant to the contents of this article. The authors alone are responsible for the content and writing of this article.
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