Abnormal pulmonary flow is associated with impaired right ventricular coupling in patients with COPD

Clinical Application of 4D Flow MR Imaging to Pulmonary Hypertension

“…57 Helicity is a scalar describing the relationship between flow strength and the mount of local rotation in flow; it is mathematically defined as the scalar dot product between velocity and vorticity vector fields integrated over a defined anatomic space. 56 In their study, COPD patients had decreased maximum systolic helicity in the main pulmonary artery, and helicity was associated with increased pulmonary arterial stiffness and RV function. 56 This technique, 4D flow MRI, may have diagnostic potential for hemodynamic characterization in patients with cardiopulmonary disease.…”

“…56 In their study, COPD patients had decreased maximum systolic helicity in the main pulmonary artery, and helicity was associated with increased pulmonary arterial stiffness and RV function. 56 This technique, 4D flow MRI, may have diagnostic potential for hemodynamic characterization in patients with cardiopulmonary disease.…”

“…Oganesyan et al evaluated the pulmonary arterial stiffness, vorticity, and helicity of blood flow in COPD patients and controls. 56 Vorticity is a vector describing local flow rotation rate at any time point of the cardiac cycle at defined anatomical location. 57 Helicity is a scalar describing the relationship between flow strength and the mount of local rotation in flow; it is mathematically defined as the scalar dot product between velocity and vorticity vector fields integrated over a defined anatomic space.…”

Effects of Cardiopulmonary Rehabilitation Promotion Mode Intervention Combined with Oxygen Therapy on Cardiopulmonary Function and Blood Gas Analysis Indexes of COPD Patients with Cor Pulmonale

“…Some studies have shown that oxygen therapy can delay the process of COPD complicated with cor pulmonale and improve the quality of life of patients. With the development of medical technology, clinical practice pays more attention to the development of rehabilitation treatments [ 3 , 4 ]. Cardiopulmonary rehabilitation promotion mode intervention can be used as an important part of cardiopulmonary rehabilitation in elderly patients with CHF, which can significantly improve the cardiopulmonary function of patients [ 5 , 6 ].…”

Hemi-Fontan and bidirectional Glenn operations result in flow-mediated viscous energy loss at the time of stage II palliation

“…In addition, the role of helical flow through large vessels merits further exploration, as higher helicity has been previously associated with better hemodynamic outcomes in patients with pulmonary hypertension. 25 , 26 Future studies using 4D-Flow MRI–estimated E L ’ should be evaluated in the context of stress exercise using MRI-compatible devices to appreciate the energy loss in the context of higher myocardial workload.…”