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PAL modes of attachment. In-parallel configuration: inflow attached to pulmonary artery and outflow attached to left atrium. In-series configuration: inflow attached to proximal pulmonary artery and outflow attached to distal pulmonary artery (pulmonary artery ligated with band between inflow and outflow cannulae). (From Perfusion 2002; 17:253–268; Fig. 4)
