Myocardial bridge (MB) of the left anterior descending (LAD) coronary artery occurs in approximately 25% of the population. For patients with a symptomatic, hemodynamically significant MB who fail medical therapy, MB unroofing represents the optimal surgical management. Here, we evaluated minimally invasive MB unroofing in selected patients compared with sternotomy.MB unroofing was performed in 141 adult patients via sternotomy on-pump (ST-on, n=40), sternotomy off-pump (ST-off, n=62), or mini thoracotomy off-pump (MT, n=39). Angina symptoms were assessed preoperatively and 6-months postoperatively using the Seattle Angina Questionnaire. Matching included all MT patients and 31 ST-off patients with similar MB characteristics, no previous cardiac surgery or coronary interventions, and no concomitant procedures.MT patients tended to have a shorter MB length than ST-on and ST-off patients (2.57 vs 2.93 vs 3.09 cm, p=0.166). ST-on patients had a longer hospital stay than ST-off and MT patients (5.0 vs 4.0 vs 3.0 days, p<0.001), and more blood transfusions (15.2% vs 0.0% vs 2.6%, p=0.002). After matching, MT patients had a shorter hospital stay than ST-off patients (3.0 vs 4.0 days, p=0.005). No deaths or major complications occurred in any group. In all groups, MB unroofing yielded significant symptomatic improvement regarding physical limitation, angina stability, angina frequency, treatment satisfaction, and quality of life.We report the largest experience of off-pump minimally invasive MB unroofing, which may be safely performed in carefully selected patients, yielding dramatic improvements in angina symptomatology at 6 months after surgery.
View details for DOI 10.1016/j.athoracsur.2020.11.023
View details for PubMedID 33333083