Blood Pressure Management in Acute Aortic Syndrome

Initial Management Approach

The European Society of Cardiology recommends immediate anti-impulse therapy targeting systolic blood pressure <120 mmHg and heart rate ≤60 beats per minute to decrease aortic wall stress and prevent dissection propagation 1, 2
Immediate transfer to intensive care unit with continuous ECG monitoring and invasive arterial line placement is mandatory to accurately monitor blood pressure 1, 2, 3
First-line therapy should be intravenous beta-blockers (labetalol preferred due to its alpha- and beta-blocking properties) to reduce both heart rate and blood pressure 1, 3, 4
If beta-blockers are contraindicated, non-dihydropyridine calcium channel blockers (diltiazem, verapamil) should be used as an alternative for rate control 2, 3, 4

Target systolic blood pressure: <120 mmHg or the lowest BP that maintains adequate end-organ perfusion 1, 2, 4
Target heart rate: ≤60 beats per minute 1, 2, 3

Initiate IV beta-blocker (labetalol or esmolol) as the first step in management 1
Titrate beta-blockers to achieve heart rate ≤60 bpm 1, 3
Add IV vasodilators (nicardipine, clevidipine, or nitrates) if BP remains >120 mmHg after adequate heart rate control 1, 4, 6

In cases of malperfusion, higher blood pressure may be tolerated to optimize perfusion to threatened regions 1, 8
For patients with contraindications to beta-blockers, non-dihydropyridine calcium channel blockers should be used 2, 4
Beta-blockers should be used cautiously in the setting of acute aortic regurgitation as they will block compensatory tachycardia 6, 7

In patients who can be managed conservatively and have achieved hemodynamic targets with IV therapy, transition to oral beta-blockers and other BP-lowering agents after 24 hours if gastrointestinal transit is preserved 2

Watch for signs of organ malperfusion which may necessitate adjustment of blood pressure targets 1, 8
Monitor for progression of dissection with repeat imaging 8
For type A dissection, urgent surgical consultation should be obtained while initiating medical therapy 3, 4

Delaying initiation of beta-blockers in favor of vasodilators, which can worsen dissection through reflex tachycardia 5, 6
Excessive blood pressure lowering that may compromise organ perfusion 8
Failing to monitor blood pressure in both arms (may miss pseudo-hypotension due to obstruction of an aortic arch branch) 8
Neglecting pain control, which can contribute to hypertension 2, 3