Christian Schoenfeld1,2, Jan B Hinrichs1,2, Karen M Olsson2,3, Martin-Alexander Kuettner1, Julius Renne1,2, Till Kaireit1,2, Christoph Czerner1,2, Frank Wacker1,2, Marius M Hoeper2,3, Bernhard C Meyer1,2, Jens Vogel-Claussen4,5. 1. Institute for Diagnostic and Interventional Radiology, Hannover Medical School, OE 8220, Carl-Neuberg-Str. 1, 30625, Hannover, Germany. 2. Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Hannover, Germany. 3. Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany. 4. Institute for Diagnostic and Interventional Radiology, Hannover Medical School, OE 8220, Carl-Neuberg-Str. 1, 30625, Hannover, Germany. vogel-claussen.jens@mh-hannover.de. 5. Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Hannover, Germany. vogel-claussen.jens@mh-hannover.de.
Abstract
OBJECTIVES: Chronic thromboembolic pulmonary hypertension (CTEPH) can be treated with balloon pulmonary angioplasty (BPA) in inoperable patients. Sensitive non-invasive imaging methods are missing to detect treatment response after a single BPA treatment session. Therefore, the aim of this study was to measure treatment response after a single BPA session using cardio-pulmonary MRI. MATERIALS AND METHODS: Overall, 29 patients with CTEPH were examined with cardio-pulmonary MRI before and 62 days after their initial BPA session. Pulmonary blood flow (PBF), first-pass bolus kinetic parameters, and biventricular mass and function were determined. Multiple linear regression analysis was implemented to estimate the relationship of PBF change in the treated lobe with treatment change of full width at half maximum (FWHM), cardiac output (CO), ventricular mass index (VMI), pulmonary transit time (PTT) and PBF change in the non-treated lobes. Paired Wilcoxon rank sum test and Spearman rho correlation were used. RESULTS: After BPA regional PBF increased in the treated lobe (p < 0.0001) as well as in non-treated lobes (p = 0.015). PBF treatment changes in the treated lobe were significantly larger compared with the non-treated lobes (p = 0.0049). Change in NT proBNP, MRI-derived mean pulmonary artery pressure (mPAP), PTT, FWHM, right ventricular (RV) ejection fraction, RV stroke volume, CO, VMI and PBF in the non-treated lobes correlated with PBF change in the treated lobe (p < 0.05). PBF changes in the treated lobe were independently predicted by PTT as well as PBF change in the non-treated lobes. CONCLUSION: Cardio-pulmonary MRI detects and quantifies treatment response after a single BPA treatment session. KEY POINTS: • Two months after BPA regional parenchymal pulmonary perfusion (PBF) increased in the total lung parenchyma (p = 0.005), the treated lobes (p < 0.0001) and non-treated lobes (p = 0.015). • The PBF treatment changes in the treated lobe were significantly larger than in the non-treated lobes (p = 0.0049). • Change in NT proBNP, MRI-derived mean pulmonary artery pressure, pulmonary transit time, full width at half maximum, right ventricular (RV) ejection fraction, RV stroke volume, cardiac output, ventricular mass index and PBF in the non-treated lobes correlated with PBF change in the treated lobe (p < 0.05).
OBJECTIVES:Chronic thromboembolic pulmonary hypertension (CTEPH) can be treated with balloon pulmonary angioplasty (BPA) in inoperable patients. Sensitive non-invasive imaging methods are missing to detect treatment response after a single BPA treatment session. Therefore, the aim of this study was to measure treatment response after a single BPA session using cardio-pulmonary MRI. MATERIALS AND METHODS: Overall, 29 patients with CTEPH were examined with cardio-pulmonary MRI before and 62 days after their initial BPA session. Pulmonary blood flow (PBF), first-pass bolus kinetic parameters, and biventricular mass and function were determined. Multiple linear regression analysis was implemented to estimate the relationship of PBF change in the treated lobe with treatment change of full width at half maximum (FWHM), cardiac output (CO), ventricular mass index (VMI), pulmonary transit time (PTT) and PBF change in the non-treated lobes. Paired Wilcoxon rank sum test and Spearman rho correlation were used. RESULTS: After BPA regional PBF increased in the treated lobe (p < 0.0001) as well as in non-treated lobes (p = 0.015). PBF treatment changes in the treated lobe were significantly larger compared with the non-treated lobes (p = 0.0049). Change in NT proBNP, MRI-derived mean pulmonary artery pressure (mPAP), PTT, FWHM, right ventricular (RV) ejection fraction, RV stroke volume, CO, VMI and PBF in the non-treated lobes correlated with PBF change in the treated lobe (p < 0.05). PBF changes in the treated lobe were independently predicted by PTT as well as PBF change in the non-treated lobes. CONCLUSION: Cardio-pulmonary MRI detects and quantifies treatment response after a single BPA treatment session. KEY POINTS: • Two months after BPA regional parenchymal pulmonary perfusion (PBF) increased in the total lung parenchyma (p = 0.005), the treated lobes (p < 0.0001) and non-treated lobes (p = 0.015). • The PBF treatment changes in the treated lobe were significantly larger than in the non-treated lobes (p = 0.0049). • Change in NT proBNP, MRI-derived mean pulmonary artery pressure, pulmonary transit time, full width at half maximum, right ventricular (RV) ejection fraction, RV stroke volume, cardiac output, ventricular mass index and PBF in the non-treated lobes correlated with PBF change in the treated lobe (p < 0.05).
Entities:
Keywords:
Balloon angioplasty; Heart; Magnetic resonance imaging; Perfusion; Pulmonary hypertension
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