Vorticity is a marker of diastolic ventricular interdependency in pulmonary hypertension
| Autor: | Michal Schäfer, Joyce D. Schroeder, J. Kern Buckner, Jean Hertzberg, Brett E. Fenster, James Browning, Kendall S. Hunter, Robin Shandas, Vitaly O. Kheyfets |
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| Rok vydání: | 2016 |
| Předmět: |
Pulmonary and Respiratory Medicine
medicine.medical_specialty Tricuspid valve medicine.diagnostic_test business.industry Diastole Chamber geometry Blood flow 030204 cardiovascular system & hematology medicine.disease Pulmonary hypertension Pathophysiology 03 medical and health sciences 0302 clinical medicine medicine.anatomical_structure Cardiac magnetic resonance imaging Internal medicine Mitral valve medicine Cardiology 030212 general & internal medicine business Original Research |
| Zdroj: | Pulmonary circulation. 6(1) |
| ISSN: | 2045-8932 |
| Popis: | Our objective was to determine whether left ventricular (LV) vorticity (ω), the local spinning motion of a fluid element, correlated with markers of ventricular interdependency in pulmonary hypertension (PH). Maladaptive ventricular interdependency is associated with interventricular septal shift, impaired LV performance, and poor outcomes in PH patients, yet the pathophysiologic mechanisms underlying fluid-structure interactions in ventricular interdependency are incompletely understood. Because conformational changes in chamber geometry affect blood flow formations and dynamics, LV ω may be a marker of LV-RV (right ventricular) interactions in PH. Echocardiography was performed for 13 PH patients and 10 controls for assessment of interdependency markers, including eccentricity index (EI), and biventricular diastolic dysfunction, including mitral valve (MV) and tricuspid valve (TV) early and late velocities (E and A, respectively) as well as MV septal and lateral early tissue Doppler velocities (e'). Same-day 4-dimensional cardiac magnetic resonance was performed for LV E (early)-wave ω measurement. LV E-wave ω was significantly decreased in PH patients (P = 0.008) and correlated with diastolic EI (Rho = -0.53, P = 0.009) as well as with markers of LV diastolic dysfunction, including MV E(Rho = 0.53, P = 0.011), E/A (Rho = 0.56, P = 0.007), septal e' (Rho = 0.63, P = 0.001), and lateral e' (Rho = 0.57, P = 0.007). Furthermore, LV E-wave ω was associated with indices of RV diastolic dysfunction, including TV e' (Rho = 0.52, P = 0.012) and TV E/A (Rho = 0.53, P = 0.009). LV E-wave ω is decreased in PH and correlated with multiple echocardiographic markers of ventricular interdependency. LV ω may be a novel marker for fluid-tissue biomechanical interactions in LV-RV interdependency. |
| Databáze: | OpenAIRE |
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