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Background Right ventricular (RV) function appears to declines following cardiac surgery, particularly long axis function. Three principal speculated causes are suggested: a) loss of constraint when pericardium is opened, b) intraoperative ischemia, c) post-operative tethering. The relative contributions are unknown. Similarly, the impact on different aspects of RV function (AV plane descent, apical movement towards the AV plane) is obscure. The length and complexity of cardiac operations is also thought to contribute to RV impairment. We sought to untangle these relative contributions by comparing preand post-surgery RV function changes in a cohort of patients where all had aortic valve replacement (AVR) but 1/3 had in addition grafting (CABG). Different measures of RV function were used and paired pre and post.

The Right ventricle and cardiac surgery - more resilient than thought: multiparametric quantification shows altered rather than reduced function