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Quantitation of the diastolic stress test: filling pressure vs. diastolic reserve
journal contribution
posted on 2023-05-17, 20:58 authored by Gibby, C, Wiktor, DM, Burgess, M, Kusunose, K, Thomas MarwickThomas MarwickAIMS: The diastolic stress test (DST) may facilitate the attribution of exertional dyspnoea to cardiac and non-cardiac diseases. However, there is currently no consensus as to the optimal marker of exertional diastolic dysfunction (DD)-the main alternatives being estimated left ventricular (LV) filling pressure (exercise E/e') and diastolic functional reserve (DFRI). We sought to compare the correlates of these parameters. METHODS AND RESULTS: DST was performed by adding the measurement of the transmitral (E) and annular (e') velocities to standard exercise echo in 559 consecutive patients without significant rest or exercise mitral regurgitation. Exertional DD was separately defined by post-stress E/e' >13 or DFRI <13.5. Logistic regression was used to identify the correlates of abnormal responses and linear regression was used to identify the contribution of both to exercise capacity. Abnormal exercise E/e' (n = 112, 20%) and DFRI (n = 317, 57%) were modestly associated (κ 0.35, P < 0.0001). In a linear regression, abnormal exercise E/e' (β = -0.19, P < 0.001) and DFRI (β = -0.15, P = 0.001) were associated with exercise capacity, independent of age, body mass index, wall thickness, haemodynamics or abnormal stress results. Logistic regression revealed abnormal exercise E/e' (R(2)= 0.34) to be independently associated with female gender (β = 0.26, 95% CI: 0.11-0.60, P = 0.002), age (β = 1.04, 95% CI: 1.01-1.07, P = 0.01), hypertension (β = 0.35, 95% CI: 0.15-0.80, P = 0.01) and wall thickness (β = 4.3, 95% CI: 1.3-14.1, P = 0.02). The closest association of abnormal DFRI was exercise capacity (β = 0.89, 95% CI: 0.79-1.02, P = 0.09); no other clinical or stress variable was independently associated. CONCLUSION: Exercise E/e' and DFRI are both associated with exercise capacity, but E/e' is more closely associated with the expected parameters of DD.
History
Publication title
European Heart Journal Cardiovascular ImagingVolume
14Pagination
223-227ISSN
2047-2404Department/School
Menzies Institute for Medical ResearchPublisher
Oxford University PressPlace of publication
United KingdomRepository Status
- Restricted