Quantification of Systemic-to-Pulmonary Artery Collateral Flow

Implication of pulmonary-systemic flow information in the management of complex presentation of pulmonary arterial hypertension: exploring role of phase contrast MRI technique

“…Conventional angiography or CT angiography were used previously to demonstrate and crudely to estimate the extent of shunting. When accurate information is necessary for interventional procedures like coiling of collateral vessel, a robust method is necessary to define morphology of vessels, quantify the shunt and assess the efficacy of the procedure (7,8). Regarding SPCF estimation, Whitehead et al (7) hypothesized two measurement options (I) the difference in ascending aortic (Ao) and total caval flow (SVC + IVC) and other (II) the difference between pulmonary venous and artery flow (PV-PA), providing two independent estimators of SPCF.…”

The single ventricle pathway in paediatrics for anaesthetists

“…The single ventricle pathway BJA Education -Volume 19, Number 5, 2019 on systemic ventricle and lowers pulmonary vascular pressure, but potentially at the expense of systemic oxygenation) 22 , or intrapulmonary collaterals (coiling increases systemic saturations by reducing intrapulmonary shunt).…”

Segmental Pulmonary Hypertension in Children with Congenital Heart Disease

“…However, the measurement of blood flow in MAPCAs is possible in the operating room using a modified pump circuit [ 10 ]. Noninvasively, phase contrast cine CMR blood flow can be measured accurately in branch pulmonary arteries and MAPCAs in single ventricle physiology [ 11 ]. Phase contrast CMR can be useful for screening patients with unilateral stenosis and contralateral increases in PVR by estimating the differential regurgitant fraction of the branch pulmonary artery that cannot be identified with net blood flows alone [ 12 ].…”