Postoperative cardiac support with a pulsatile assist pump: techniques and results

Area of Science:

• Cardiovascular Surgery
• Mechanical Circulatory Support
• Heart Failure Management

Background:

• Pulsatile assist pumps have been utilized since 1980 for patient circulatory support.
• A cohort of 23 patients received pulsatile assist pump therapy.

Purpose of the Study:

• To evaluate the efficacy and outcomes of pulsatile assist pump use in patients requiring circulatory support.
• To identify factors influencing survival in patients treated with pulsatile assist devices.

Main Methods:

• Retrospective analysis of 23 patients treated with pulsatile assist pumps.
• Categorization of patients based on the type of ventricular support required (left, right, or biventricular).

Main Results:

• Overall postoperative survival was 39% (9/23).
• Left ventricular support: 44% survival (7/16 survived, 9 weaned).
• Right ventricular support: 66% survival (2/3 survived).
• Biventricular assistance: 0% survival (0/4 survived).
• All 5 long-term survivors were New York Heart Association Class I or II.

Conclusions:

• Pulsatile pumps can temporarily support pulmonary or systemic circulation.
• Significant improvement in ventricular function is often seen in univentricular failure.
• Right ventricular function is critical for survival with left ventricular support.
• Preoperative cardiogenic shock and prolonged cardiopulmonary bypass increase risks.
• Further research is needed for optimal patient selection, cardiopulmonary bypass techniques, and biventricular failure identification.