PURPOSE: To assess the accuracy of several noninvasive MRI-based estimators of pulmonary artery pressure by comparing them with invasive pressure measurement. MATERIALS AND METHODS: We compared five MRI methods with invasive pressure measurement by catheterization, in one group of pulmonary hypertension (PH) patients. Doppler echocardiography was included as a reference method. Main inclusion criterion was a mean pulmonary artery pressure above 25 mmHg at catheterization. MRI velocity quantification was used to obtain pulmonary flow acceleration and ejection times, and pulse wave velocity. The ventricular mass index was also assessed on MRI. Two commercially available 1.5-T systems were used for this study. RESULTS: Data from 44 patients were analyzed. Correlation of acceleration time with mean pressure was: r = -0.21, P = 0.21, correlation of the acceleration/ejection time ratio with systolic pressure was: r = -0.26, P = 0.01. The ventricular mass index showed the best correlation with mean pressure, with r = 0.56, P < 0.001. Using the pulse wave velocity and the cross-sectional area of the pulmonary artery, the mean pressure could not be estimated accurately. CONCLUSION: Accurate estimation of pulmonary artery pressure in PH patients was not feasible by the MRI estimators studied. These noninvasive methods cannot replace right heart catheterization at this moment.
PURPOSE: To assess the accuracy of several noninvasive MRI-based estimators of pulmonary artery pressure by comparing them with invasive pressure measurement. MATERIALS AND METHODS: We compared five MRI methods with invasive pressure measurement by catheterization, in one group of pulmonary hypertension (PH) patients. Doppler echocardiography was included as a reference method. Main inclusion criterion was a mean pulmonary artery pressure above 25 mmHg at catheterization. MRI velocity quantification was used to obtain pulmonary flow acceleration and ejection times, and pulse wave velocity. The ventricular mass index was also assessed on MRI. Two commercially available 1.5-T systems were used for this study. RESULTS: Data from 44 patients were analyzed. Correlation of acceleration time with mean pressure was: r = -0.21, P = 0.21, correlation of the acceleration/ejection time ratio with systolic pressure was: r = -0.26, P = 0.01. The ventricular mass index showed the best correlation with mean pressure, with r = 0.56, P < 0.001. Using the pulse wave velocity and the cross-sectional area of the pulmonary artery, the mean pressure could not be estimated accurately. CONCLUSION: Accurate estimation of pulmonary artery pressure in PH patients was not feasible by the MRI estimators studied. These noninvasive methods cannot replace right heart catheterization at this moment.
Authors: Mariëlle C van de Veerdonk; Sophie A Dusoswa; J Tim Marcus; Harm-Jan Bogaard; Onno Spruijt; Taco Kind; Nico Westerhof; Anton Vonk-Noordegraaf Journal: Int J Cardiovasc Imaging Date: 2013-12-04 Impact factor: 2.357
Authors: Heather Harris; Richard Barraclough; Christine Davies; Iain Armstrong; David G Kiely; Edwin van Beek Journal: J Radiol Case Rep Date: 2008-09-01
Authors: Yigitcan Eryaman; Patrick Zhang; Lynn Utecht; Kivanc Kose; Russell L Lagore; Lance DelaBarre; Jeramy Kulesa; Lynn E Eberly; Gregor Adriany; Tinen L Iles; Paul A Iaizzo; J Thomas Vaughan; Kamil Ugurbil Journal: Magn Reson Med Date: 2017-03-25 Impact factor: 4.668
Authors: T J Arai; A C Henderson; D J Dubowitz; D L Levin; P J Friedman; R B Buxton; G K Prisk; S R Hopkins Journal: J Appl Physiol (1985) Date: 2008-12-04