The supraventricular crest is of significant importance for right ventricular contraction: Lessons from patients operated for Tetralogy of Fallot

Anatomical considerations suggest the supraventricular crest (SC) is important for right ventricular free-wall to septum (RV FW-S) inward motion and may importantly influence overall (RV) function. The of approximation FW-S on RV function, implicitly importance SC, be judged from patients with repaired tetralogy Fallot (rToF), where components this muscular bridge are separated. functional parameters were determined magnetic resonance imaging (CMR) related in 106 rToF patients, compared CMR 30 normal subjects echocardiography another 39 subjects. In subjects, SC shortened 41 ± 5% during systole basal distance significantly more than mid-ventricular (47 17% vs. 23 12%; p < 0.05). resection resulted a divided 42.5%. Resection was associated lowered (21 13% 9%; both 0.0001) lower RVEF (45 8% 54 0.0001). Even if present, shortening correlated relative (r = 0.61; P 0.42; There no association between diastolic volumes or regurgitation fractions pulmonary tricuspid valves. As demonstrated free-wall-to-septum Our finding suggests that secures