Abstract 16078: Pulmonary Vasculopathy Assessed By Intravascular Ultrasound in Persistent Pulmonary Hypertension After Mitral Valve Replacement, Comparation to Idiopathic Pulmonary Arterial Hypertension and Healthy Controls
Purpose: The aim of the study is to assess pulmonary vasculopathy (wall fibrosis, pulmonary arterial pulsatility and elastic modulus ) in patients with persistent pulmonary hypertension (pulmonary systolic pressure by ECHO > 50 mmhg ) at least 1 year after mitral valve replacement with normal function of the valve. The evaluation was carried out by intravascular ultrasound (IVUS) in medium sized pulmonary arteries. We compared three groups: Group 1 ( persistent pulmonary hypertension after mitral valve replacement), Group 2 (pulmonary hypertension belonging to the group 1 of the Dana Point classification) and Group 3 (healthy controls).
Methods: We studied 43 patients, 15 in Group 1 , 18 Group 2 and 10 in Group 3. Group 1: 13 females, the mean age of this group was 74+-7 years; Group 2: 14 females, 53+-14 years and Group 3: 6 females, 51+-5 years. All patients were submitted to left and right heart catheterization, and IVUS in medium sized elastic PA ( 2-3 mm diameter ) of the inferior lobes. Studied variables were: mean pulmonary artery pressure (PAP, mm Hg), pulmonary wedge pressure, aortic pressure, cardiac output (CO,l/min), pulmonary vascular resistance (PVR, Wood Units), IVUS pulsatility and elastic modulus (EM,mm Hg).
Local pulsatility was estimated by IVUS: (systolic- diastolic lumen area/ diastolic lumen area) X 100. PA stiffness was assessed by the elastic modulus (EM= pulse pressure/ IVUSp).
Results: In Group 3 all variables were statistically different from the other 2 groups (p<0.01). Variables are shown in table.
Conclusions: Group 1, even with a lower mean PAP than Group 2 (p<0.05) showed a similar anatomical ( wall fibrosis ) and similar functional wall remodeling ( EM ).
Author Disclosures: J.J. Grignola: None. L.L. Fernandez-Lopez: None. E.E. Domingo-Ribas: None. R.R. Aguilar: None. C.C. Arredondo: None. G.G. Zavala: None. A.A. Roman: None.
- © 2015 by American Heart Association, Inc.