Advanced heart failure poses an immense clinical challenge worldwide. Durable mechanical circulatory support provides life-saving therapy for patients who fail optimal medical management. However, post-implant right ventricular failure frequently impairs clinical recovery and increases perioperative mortality. Consequently, cardiothoracic surgeons increasingly evaluate less invasive techniques, such as thoracotomy LVAD implantation, to preserve right ventricular geometry, reduce operative trauma, and improve post-surgical outcomes.

Clinical Burden of Right Heart Failure and Thoracotomy LVAD Implantation

Right ventricular dysfunction remains a devastating complication following mechanical circulatory support. Historically, full median sternotomy served as the universal standard for device insertion. Nevertheless, sternotomy disrupts the anterior pericardial integrity and alters right ventricular compliance. When surgeons open the pericardium widely, the right ventricle loses mechanical restraint and shifts anteriorly. This sudden mechanical disruption alters right ventricular septal curvature and increases wall stress. Furthermore, aggressive left ventricular unloading increases venous return, which rapidly overloads a compromised right heart. Because right ventricular failure occurs in up to thirty percent of recipients, clinical teams require innovative surgical modifications to protect myocardial function. Less invasive thoracotomy LVAD implantation preserves the anterior pericardium and stabilizes native anatomical relationships. Therefore, this approach prevents abrupt lateral ventricular dilatation and reduces right chamber distortion. In addition, preserving chest wall stability mitigates excessive mediastinal bleeding and reduces systemic inflammation. As a result, maintaining right ventricular mechanical efficiency through targeted surgical access provides substantial physiological advantages. Clinicians now investigate whether these protective anatomical mechanisms translate directly into superior echocardiographic measurements, reduced morbidity, and enhanced postoperative hemodynamic performance.

Study Design and Doubly Robust Inverse Probability Weighting Analysis

To evaluate how surgical technique affects early myocardial function, researchers conducted a rigorous observational investigation. The cohort included one hundred eighty-seven consecutive patients undergoing durable device placement. Within this sample, fifty-five individuals received thoracotomy LVAD implantation, whereas one hundred thirty-two patients underwent traditional median sternotomy. Because non-randomized surgical registries contain potential treatment allocation biases, investigators utilized doubly robust inverse probability weighting based on propensity scores. This advanced statistical approach balances measured baseline confounders between surgical cohorts while providing robust estimation against model misspecification. Consequently, baseline right ventricular performance, pulmonary hemodynamics, and clinical risk profiles matched closely across both treatment arms. The primary investigative endpoint was right ventricular systolic performance during the early postoperative phase. Investigators quantified this functional metric through tricuspid annular plane systolic excursion, a validated echocardiographic parameter of longitudinal myocardial contraction. Furthermore, the statistical team integrated multi-variable regression models to control for residual demographic discrepancies and surgical variables. By adjusting for heart transplantation as a major competing clinical risk, the analytical framework yielded an exceptionally clear assessment of real-world procedural impact and postoperative clinical trajectories.

Echocardiographic Preservation of Right Ventricular Geometry and TAPSE

The study demonstrated clear hemodynamic and echocardiographic advantages favoring the less invasive approach. Despite comparable preoperative functional parameters, thoracotomy LVAD implantation achieved superior early postoperative right ventricular systolic preservation compared to conventional median sternotomy. Specifically, patients in the thoracotomy cohort maintained a median postoperative tricuspid annular plane systolic excursion of 12.0 millimeters. Conversely, patients who underwent median sternotomy experienced a significant drop, achieving a median value of only 11.0 millimeters. Weighted multi-variable regression confirmed this finding, showing that median sternotomy independently correlated with a marked decrease in longitudinal excursion. Because longitudinal fiber shortening drives the majority of right ventricular stroke volume, this quantitative preservation holds meaningful physiological importance. In contrast, full sternotomy exposes the right ventricle to direct mechanical manipulation and disrupts pericardial constraint. Consequently, sternotomy promotes right ventricular dyssynchrony and exacerbates geometric dilation. Additionally, preserved pericardial constraint in thoracotomy limits sudden right ventricular distention when pulmonary blood volume increases rapidly. Therefore, maintaining native pericardial architecture directly safeguards early contractile reserve. These reproducible echocardiographic measurements demonstrate that minimally invasive surgical access preserves essential longitudinal right ventricular kinematics during the vulnerable recovery phase.

Hospital Length of Stay and Long-Term Survival Outcomes

Beyond echocardiographic metrics, the surgical technique demonstrated substantial influence on systemic recovery and resource utilization. In weighted regression models, median sternotomy correlated with a thirty-five percent relative increase in hospital length of stay compared to thoracotomy LVAD implantation. Patients recovering from sternotomy encountered prolonged mechanical ventilation, increased chest tube drainage, and delayed physical rehabilitation. Conversely, preserving chest wall rigidity through lateral thoracotomy reduced postoperative pain, supported early extubation, and facilitated accelerated ambulation. Furthermore, the investigators analyzed long-term survival while rigorously accounting for heart transplantation as a competing event. In this comprehensive competing-risk framework, median sternotomy carried a significantly higher subdistribution hazard ratio for long-term mortality. Because early right ventricular dysfunction precipitates renal congestion, hepatic failure, and multi-organ hypoperfusion, preserving right ventricular function during the index procedure dictates downstream survival. Moreover, patients receiving thoracotomy experienced lower cumulative rates of reoperation for surgical bleeding. Thus, avoiding a wide pericardiotomy translates into enduring clinical benefits that extend far beyond the immediate operative episode. These clinical findings emphasize that surgical strategy directly governs the complete recovery trajectory in end-stage heart failure.

Surgical Implications for Advanced Heart Failure Management

These compelling findings provide valuable practical insights for multidisciplinary heart failure and mechanical circulatory support teams. As durable device technology advances, surgical technique must evolve to minimize procedural morbidity. Thoracotomy LVAD implantation presents an attractive alternative, particularly for candidates with borderline right ventricular hemodynamics or elevated surgical risk. In addition, avoiding a primary sternotomy preserves virgin tissue planes in the anterior mediastinum. This anatomical preservation offers crucial practical advantages if the recipient subsequently undergoes cardiac transplantation or redo surgical intervention. Nevertheless, adopting minimally invasive thoracotomy requires specialized surgical expertise and meticulous patient selection. Surgeons must carefully evaluate inflow cannula positioning and outflow graft orientation using three-dimensional imaging. Furthermore, intraoperative transesophageal echocardiography remains essential to monitor acute chamber filling and guide optimal rotational device alignment. Collaborating cardiac anesthesiologists must aggressively optimize right ventricular preload, maintain coronary perfusion pressure, and manage pulmonary vascular resistance. Overall, these findings encourage clinical centers to integrate thoracotomy approaches into standard practice protocols. By proactively protecting right ventricular mechanics, surgical teams can significantly improve durable device outcomes and long-term functional recovery.

Why does thoracotomy preserve right ventricular function better than sternotomy?

Thoracotomy preserves the anterior pericardial integrity, maintaining essential structural constraint around the right heart. In traditional sternotomy, opening the pericardium causes the thin-walled right ventricle to lose geometric restraint, leading to acute dilatation and septal shift. By leaving the pericardium largely intact, thoracotomy maintains favorable pressure-volume relationships. Consequently, the right ventricle maintains optimal longitudinal shortening, minimizes contractile dyssynchrony, and tolerates sudden increases in venous return post-implantation far more effectively.

How does postoperative TAPSE correlate with clinical outcomes after LVAD surgery?

Tricuspid annular plane systolic excursion measures longitudinal right ventricular fiber contraction, which generates the majority of right heart stroke volume. A marked postoperative decline in TAPSE reflects acute myocardial dysfunction, which strongly correlates with prolonged inotropic requirements, acute renal failure, and extended hospitalizations. Conversely, maintaining higher postoperative TAPSE values indicates preserved right ventricular contractility. This structural resilience ensures adequate left ventricular device filling, avoids systemic venous congestion, and significantly reduces long-term mortality risks.

Does a thoracotomy approach complicate future heart transplantation procedures?

On the contrary, thoracotomy significantly simplifies future orthotopic heart transplantation. Standard sternotomy creates extensive adhesions between the anterior mediastinum, right ventricle, and posterior sternal surface, which substantially complicates subsequent re-entry. In contrast, lateral thoracotomy preserves the anterior mediastinal tissue planes entirely untouched. Therefore, surgeons encounter fewer dense adhesions, encounter substantially less operative bleeding during sternal re-entry, and dramatically reduce the risk of inadvertent cardiac laceration during subsequent transplantation procedures.

Disclaimer: This content is for informational and educational purposes only and is not intended to serve as medical advice, diagnosis, or treatment. Healthcare professionals should evaluate individual patient circumstances and refer to the latest local and national guidelines for clinical practice.

References

1. Tanyeri Üzel S et al. Impact of Thoracotomy-Based Left Ventricular Assist Device Implantation on Right Ventricular Functional Preservation. ASAIO J. 2026 Oct 12. doi: 10.1097/MAT.0000000000002877. PMID: 42863114.
2. Lampert BC, Teuteberg JJ, Cowger JA, et al. Impact of thoracotomy approach on right ventricular failure and length of stay in left ventricular assist device implants: an intermacs registry analysis. J Heart Lung Transplant. 2021;40(9):945-953.
3. Mangi AA, Soleimani B, Czer LSC, et al. Thoracotomy versus sternotomy? The effect of surgical approach on outcomes after left ventricular assist device implantation: A review of the literature and meta-analysis. J Card Surg. 2021;36(8):2885-2894.