Copyright © 2000 by the European Society of Cardiology.
Mitral flow derived Doppler indices of left ventricular diastolic function in a general population. The Tromsø study
a Institute of Community Medicine, Institute of Clinical Medicine, University of Tromsø Norway
b Institute of Clinical Medicine, University of Tromsø Norway
revised December 13, 1999; accepted December 15, 1999
Abstract
Aims Left ventricular diastolic dysfunction has been proposed as the basis of heart failure in patients with normal left ventricular systolic function. Doppler indices of mitral inflow have been widely used to diagnose this condition and have been shown to correlate well with increased left atrial pressure in patients with cardiovascular disease. We wanted to establish age-specific criteria for normality of these indices in a large population and to determine the association of abnormal values to age and cardiovascular disease.
Methods and Results In our sample of subjects aged 25–85 years, 3022 had pulsed Doppler measurements of mitral inflow velocities and early inflow deceleration time. The association of these indices to age and gender were established in a ‘healthy’ reference subsample of 949 subjects. Age-specific percentiles showed a significant decline with increasing age for peak early mitral inflow velocity and the ratio of peak early and atrial inflow velocities (E/A ratio), whereas early inflow deceleration time and peak atrial inflow velocity showed a significant increase with increasing age. According to current criteria for diastolic dysfunction, the prevalence of dysfunction decreases with increasing age in the general population, as well as in the subgroup with cardiovascular disease. Only 7% of the variance in deceleration time was explained by cardiovascular disease or risk factors. For the E/A ratio, however, 41 and 48% of the variance were explained for men and women, respectively.
Conclusion Age- and gender-specific criteria for normality are provided. Our data confirm the existence of a significant effect of age and gender on mitral Doppler indices of diastolic dysfunction. However, Doppler criteria for diastolic dysfunction based on these measurements need revision.
Key Words: Echocardiography, population, Doppler, heart failure, diastolic function
f1 Correspondence: Henrik Schirmer, Institute of Community Medicine, University of Tromsø, 9037 Tromsø, Norway.
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