Does the Atrium Need to Be Opened During LVAD Implantation?
No, the atrium does not typically need to be opened during standard LVAD implantation—the inflow cannula is placed directly into the left ventricular apex, not through the atrium. 1
Standard LVAD Implantation Technique
The conventional approach for all currently FDA-approved continuous-flow LVADs (HeartMate II, HeartMate 3, and HVAD) involves:
- Inflow cannula placement: Positioned 1-2 cm lateral to the left anterior descending coronary artery, in or near the apical dimple of the left ventricle 1
- Direct apical access: The cannula is inserted directly into the LV apex without opening the atrium
- Optimal positioning: The inflow cannula should align with the mitral axis and parallel to the ventricular septum for optimal pump performance 1
The surgical approach uses median sternotomy with direct visualization and cannulation of the LV apex under transesophageal echocardiographic guidance 1.
When the Left Atrium IS Opened (Special Circumstances)
The atrium is opened only in highly specific, non-standard situations:
Left Atrial Inflow Configuration (LA-Ao)
This alternative configuration is reserved for patients with:
- Small or restrictive left ventricles (hypertrophic cardiomyopathy, restrictive cardiomyopathy) 2, 3, 4
- Left ventricular cavity too small for standard apical cannulation without suction events 4
In these cases, the inflow cannula is placed through the dome of the left atrium rather than the LV apex 2, 3, 5. This is not the standard approach and carries specific risks including higher pump thrombosis rates due to reduced trans-pump flow 3.
Concomitant Atrial Procedures
The atrium may be opened if there are generally accepted concomitant procedures including:
- Closure of atrial septal defect or patent foramen ovale 1
- Atrial septal decompression in certain biventricular failure scenarios 1
Critical Pitfalls to Avoid
- Do not confuse standard LVAD implantation with left atrial configurations—the latter is only for highly selected patients with restrictive physiology
- Standard apical placement is critical for both early and long-term pump performance 1
- Intrapericardial devices (HVAD, HeartMate 3) do not require pump pocket creation and have less bleeding than extrapericardial placement 1
The overwhelming majority of LVAD implantations use direct LV apical access without opening the atrium, as this provides optimal hemodynamics and device function.