Effects of pulmonary artery balloon pumping on acute right ventricular failure complicated by right ventricular infarction
Yamauchi, S.
Nihon Kyobu Geka Gakkai 32(11): 1893-1901
1984
ISSN/ISBN: 0369-4739 PMID: 6527049 Document Number: 237033
Intra-aortic balloon pumping (IABP) has been used for the treatment of left ventricular failure after acute myocardial infarction (AMI), or in open heart surgery when mechanical support for the cardiovascular system is needed. However, it has been suggested that IABP is ineffective on right ventricular failure which is often complicated by AMI. The effectiveness of pulmonary artery balloon pumping (PABP) on acute right ventricular failure and right ventricular infarction was evaluated in dogs. Preparation of right ventricular infarction around the inflow area produced a marked bulge on the right ventricular free wall, resulting in the increase of CVP , aortic blood flow and systemic blood pressure. Left ventricular function apparently was impaired by right ventricular damage. On the contrary, volume load alone could not produce acute right ventricular failure. In this study, PABP improved right ventricular function in the state following volume load, right ventricular infarction and volume load + right ventricular infarction by so-called diastolic augmentation. In spite of increased aortic blood flow, heart rate and systemic blood pressure did not change. It was thought that left ventricular function was not influenced by PABP. In histological findings, only slight edema was found around the relatively large pulmonary arteries. This was thought to be reversible. PABP could improve right ventricular function in the state of right ventricular failure and right ventricular infarction, and it may be accepted for the treatment of right ventricular failure.