Characterization of optimal resting tension in human pulmonary arteries

Figure 4 Comparison of Optimal Resting Tension measurement in Organ Bath and Myograph system. Total 20 PA rings from four patients were used to perform the experiment. Increasing the resting tension from 1.0 to 1.6 gf significantly augmented the 40 mmol/L KCl induced active tension. Increasing the active tension from 1.6 to 2.0 gf either decreased or plateaued off the 40 mmol/L KCl induced response. Both organ bath and myograph shows similar result and confirmed that radial optimal resting tension for human pulmonary artery ring was 1.61 g.