Figure 4: Figure 4 shows the relations between PLVED, PLVEDtm and ALVED over the range of filling pressures and PEEPs. Increased PEEP decreased ALVED and PLVEDtm while PLVED did not change or increase. At each level of PEEP, volume loading increased ALVED, PLVED and PLVEDtm. PLVED, left ventricular enddiastolic pressure (mmHg).