Management of Aortic Arch Dissection
Immediate Medical Stabilization
- The European Society of Cardiology recommends immediate medical stabilization using intravenous beta-blockers to achieve systolic blood pressure 100-120 mmHg and heart rate ≤60 beats per minute in patients with aortic arch dissection 1, 2, 3
- Administer intravenous beta-blockers as first-line therapy, with target systolic blood pressure 100-120 mmHg and heart rate ≤60 beats per minute to reduce aortic wall shear stress 5, 3
- If beta-blockade alone is insufficient, add sodium nitroprusside for additional blood pressure control 5, 3
Surgical Management of Aortic Arch Dissection
- Subtotal or total arch replacement is required when the arch is involved, including reconnection of some or all supraaortic vessels to the graft 1, 2, 7
- Use moderate to deep hypothermia with circulatory arrest for arch reconstruction 1, 2, 7
- Fortify dissected layers using either gelatin resorcinol formaldehyde (GRF) glue or teflon felt strips 1, 2, 7
Acute vs. Chronic Arch Dissection
- Emergency surgical intervention is mandatory to prevent rupture, tamponade, and death in acute arch dissection (≤14 days) 1, 3
- Surgery is indicated if symptoms develop, progressive aortic enlargement occurs, or aortic regurgitation develops in chronic dissection (>14 days) 1, 7, 4
Post-Operative Management
- Switch from intravenous to oral beta-blockers after 24 hours of hemodynamic stability if gastrointestinal function is preserved 3, 4, 6
- Target long-term blood pressure <135/80 mmHg 3
- Perform follow-up imaging with CT and transthoracic echocardiography within 6 months, then at 12 months, and yearly if stable 6
- Reoperation rate is approximately 10% at 5 years and up to 40% at 10 years after primary surgery 3, 4
Critical Pitfalls to Avoid
- Never delay surgery for extensive imaging in hemodynamically unstable patients; transesophageal echocardiography can be performed as sole diagnostic procedure in operating room 5
- Avoid pericardiocentesis before surgery in tamponade cases, as reducing intrapericardial pressure causes recurrent bleeding 5
- Do not use dihydropyridine calcium channel blockers without beta-blockers due to reflex tachycardia risk 3
- Repeat sternotomy requires extreme caution as the aorta is usually unprotected by pericardium in reoperation cases 4