Successful post-bypass ventricular assist with a centrifugal pump

Area of Science:

• Cardiovascular Surgery
• Cardiothoracic Medicine
• Mechanical Circulatory Support

Background:

• A 56-year-old male presented with a massive anterior wall myocardial infarction complicated by a large left ventricular aneurysm.
• Preoperative assessment revealed severely impaired left ventricular function (ejection fraction 20%) and elevated left ventricular end-diastolic pressure (30 mm Hg).
• The patient experienced ventricular fibrillation during anesthetic induction, necessitating immediate resuscitation.

Observation:

• The patient developed progressive cardiogenic shock, requiring emergency aneurysmectomy and aorto-coronary bypass grafting to the right coronary artery (RCA).
• Despite optimal surgical conditions and intra-aortic balloon pump (IABP) support, weaning from cardiopulmonary bypass was unsuccessful.
• A centrifugal pump system was initiated as a bridge to facilitate separation from cardiopulmonary bypass.

Findings:

• The centrifugal pump, connected between the left atrium and ascending aorta, provided a flow of 5 L/min, enabling successful weaning from cardiopulmonary bypass.
• The patient remained on extracorporeal support for 20 hours without anticoagulation.
• The centrifugal pump was removed successfully, followed by IABP explantation 48 hours later.

Implications:

• This case highlights the successful application of a centrifugal pump as a temporary mechanical circulatory support in a complex cardiac surgery patient failing to wean from cardiopulmonary bypass.
• The use of extracorporeal support without anticoagulation in this scenario minimized bleeding risks.
• The patient achieved a gradual recovery and was discharged in stable condition, demonstrating the potential of such interventions in critical cardiac surgical scenarios.