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Right heart assist during beating bypass for severe left ventricular dysfunction
Goro Matsumiya1, Shigeaki Ohtake, Koji Kagisaki
1Division of Cardiovascular Surgery, Department of Surgery, Osaka University Graduate School of Medicine, Osaka, Japan. matsumg@surg1.med.osaka-u.ac.jp
Insights
Successful beating-heart revascularization was achieved in three patients with severe heart dysfunction using a right ventricular assist system. This innovative approach maintained hemodynamics and facilitated surgical access for complex coronary artery bypass grafting.
Area of Science:
- Cardiovascular Surgery
- Medical Device Technology
Background:
- Triple-vessel disease and severe left ventricular dysfunction pose significant surgical challenges.
- Traditional revascularization methods may be limited in patients with compromised cardiac function.
Observation:
- A novel approach utilizing a right ventricular assist system was employed for coronary artery bypass grafting.
- The system facilitated on-pump, beating-heart surgery, allowing for vertical displacement of the heart.
Findings:
- Successful revascularization was achieved in all three patients.
- Heparin-coated circuits and a centrifugal pump provided adequate hemodynamic support (2.5-3.5 L/min flow).
- The technique enabled improved surgical access to posterior coronary vessels.
Implications:
- This technique offers a viable option for high-risk patients requiring coronary artery bypass grafting.
- Right ventricular assist systems can enhance surgical maneuverability and hemodynamic stability during complex cardiac procedures.
- Further research may explore the broader applicability of this approach in challenging revascularization scenarios.
Abstract:
Three patients with triple-vessel disease and severe left ventricular dysfunction underwent successful revascularization on a beating heart, using a right ventricular assist system. Heparin-coated circuits with a centrifugal pump provided 2.5 to 3.5 L x min(-1) of flow to maintain good hemodynamics and enable easy access to the posterior vessels during vertical displacement of the heart.