Platypnea orthodeoxia syndrome is associated with dyspnea and arterial oxygen desamration accentuated by an upright posture. It can be secondary to an intracardiac shunt. We report a case of platypnea-orthodeoxia synd...Platypnea orthodeoxia syndrome is associated with dyspnea and arterial oxygen desamration accentuated by an upright posture. It can be secondary to an intracardiac shunt. We report a case of platypnea-orthodeoxia syndrome （POS） in a 58-year old male patient who had a pre-existing patent foramen ovale （PFO） and substantial pulmonary pathologies. He was successfully treated by percutaneous transcatheter closure of the PFO. Our case highlights the importance of recognition of this rare syndrome in patients who present with unexplained hy- poxia for whom transcatheter closure of the interatrial shunt can be safely carded out.展开更多
Platypnea-onhodeoxia syndrome （POS） describes a clinical entity of arterial hypoxemia in the upright position associated with dyspnoea, which is relieved by recumbency. The syndrome is caused by an intracardiac or i...Platypnea-onhodeoxia syndrome （POS） describes a clinical entity of arterial hypoxemia in the upright position associated with dyspnoea, which is relieved by recumbency. The syndrome is caused by an intracardiac or intrapulmonary shunt, or ventilation-perfusion mismatching. We describe here the first case of resolving/relapsing POS induced by intracardiac right-to-left shunting that was partly dependent on volume overload.展开更多
BACKGROUND The intraoperative management of patients undergoing orthotopic liver transplantation(OLT)frequently encounters hemodynamic instability after reperfusion of the new liver graft.The resulting post-reperfusio...BACKGROUND The intraoperative management of patients undergoing orthotopic liver transplantation(OLT)frequently encounters hemodynamic instability after reperfusion of the new liver graft.The resulting post-reperfusion syndrome is characterized by an increase in pulmonary vascular resistance and decrease in systemic vascular resistance.In the presence of a left to right intracardiac shunt,this hemodynamic perturbance can lead to shunt reversal followed by hypoxemia and embolization of air and debris into the systemic circulatory system.CASE SUMMARY A 43 years-old male with end-stage liver disease due to primary sclerosing cholangitis complicated by portal hypertension and hepatocellular carcinoma presented for an OLT.A bedside transthoracic echocardiography(TTE)was performed immediately before the procedure and unexpectedly identified a ventricular septal defect(VSD).The patient and the surgical team agreed to proceed with the surgery as it was a time critical donation after circulatory organ death.We developed an intraoperative plan to optimize pulmonary and systemic pressures using vasoactive support,optimized mechanical ventilation,and used transesophageal echocardiography(TEE)for intraoperative monitoring.During reperfusion,considerable turbulent flows with air were noted in the right ventricle,but no air was visualized in the left ventricle.Color flow Doppler showed no reversal flow in the VSD.At the end of the procedure,the patient was extubated in the operating room without complication and was transferred to the transplant unit for recovery.CONCLUSION Our case highlights the importance of echocardiography in the perioperative assessment of patients undergoing liver transplantation.The TTE findings obtained immediately before the procedure and the real-time use of intraoperative TEE to modify our management during the critical phases of the transplant resulted in continuity of care and a good surgical outcome for this patient.展开更多
文摘Platypnea orthodeoxia syndrome is associated with dyspnea and arterial oxygen desamration accentuated by an upright posture. It can be secondary to an intracardiac shunt. We report a case of platypnea-orthodeoxia syndrome （POS） in a 58-year old male patient who had a pre-existing patent foramen ovale （PFO） and substantial pulmonary pathologies. He was successfully treated by percutaneous transcatheter closure of the PFO. Our case highlights the importance of recognition of this rare syndrome in patients who present with unexplained hy- poxia for whom transcatheter closure of the interatrial shunt can be safely carded out.
文摘Platypnea-onhodeoxia syndrome （POS） describes a clinical entity of arterial hypoxemia in the upright position associated with dyspnoea, which is relieved by recumbency. The syndrome is caused by an intracardiac or intrapulmonary shunt, or ventilation-perfusion mismatching. We describe here the first case of resolving/relapsing POS induced by intracardiac right-to-left shunting that was partly dependent on volume overload.
文摘BACKGROUND The intraoperative management of patients undergoing orthotopic liver transplantation(OLT)frequently encounters hemodynamic instability after reperfusion of the new liver graft.The resulting post-reperfusion syndrome is characterized by an increase in pulmonary vascular resistance and decrease in systemic vascular resistance.In the presence of a left to right intracardiac shunt,this hemodynamic perturbance can lead to shunt reversal followed by hypoxemia and embolization of air and debris into the systemic circulatory system.CASE SUMMARY A 43 years-old male with end-stage liver disease due to primary sclerosing cholangitis complicated by portal hypertension and hepatocellular carcinoma presented for an OLT.A bedside transthoracic echocardiography(TTE)was performed immediately before the procedure and unexpectedly identified a ventricular septal defect(VSD).The patient and the surgical team agreed to proceed with the surgery as it was a time critical donation after circulatory organ death.We developed an intraoperative plan to optimize pulmonary and systemic pressures using vasoactive support,optimized mechanical ventilation,and used transesophageal echocardiography(TEE)for intraoperative monitoring.During reperfusion,considerable turbulent flows with air were noted in the right ventricle,but no air was visualized in the left ventricle.Color flow Doppler showed no reversal flow in the VSD.At the end of the procedure,the patient was extubated in the operating room without complication and was transferred to the transplant unit for recovery.CONCLUSION Our case highlights the importance of echocardiography in the perioperative assessment of patients undergoing liver transplantation.The TTE findings obtained immediately before the procedure and the real-time use of intraoperative TEE to modify our management during the critical phases of the transplant resulted in continuity of care and a good surgical outcome for this patient.
