Functional results in aortic root enlargement.

Area of Science:

• Cardiac Surgery
• Cardiovascular Research
• Prosthetic Valve Function

Background:

• Hemodynamically efficient prosthetic valves with larger effective orifice areas improve postoperative exercise capacity.
• Patients with small effective orifice areas may experience limited functional recovery after aortic valve replacement.

Purpose of the Study:

• To evaluate the functional effects of aortic root enlargement in the late postoperative period.
• To assess the impact of aortic root enlargement on exercise capacity in patients with small effective orifice areas.

Main Methods:

• Nineteen patients with small effective orifice areas were studied.
• A study group (n=9) underwent aortic valve replacement with a 23-mm prosthetic valve and aortic root enlargement.
• A control group (n=10) received smaller prosthetic valves (19-mm or 21-mm) without aortic root enlargement.

Main Results:

• Both groups showed similar anthropometric values, follow-up durations, echocardiographic findings, and resting prosthetic valve gradients.
• The study group demonstrated significantly higher anaerobic threshold, peak oxygen uptake, minute ventilation volume, and walk time (P <.05).

Conclusions:

• Aortic root enlargement facilitates the implantation of larger effective orifice area valves, a preferred surgical approach.
• Root enlargement significantly improves late postoperative functional capacity.
• Surgeons should consider root enlargement, potentially routinely, for patients with small effective orifice areas.