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. 2006 Jul;92(7):963–968. doi: 10.1136/hrt.2005.071746

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Figure 4 Plot of instantaneous flow versus time for the pulmonary trunk and RPA. Severe pulmonary incompetence is noted. The net forward flow for each vessel is calculated, and the percentage of net RPA forward flow to net pulmonary trunk flow gives the differential lung blood flow: right lung 65%, left lung 35%.