Do certain surgeons specialize in aortic valve replacement?

Yes: Some cardiac surgeons have become sub specialized in valve surgery. This means they might do minimally invasive surgery or high risk valve surgery. Most heart surgeons can handle routine valve operations.

In general, No. : All cardiovascular surgeons are trained to replace the aortic valve during their residency or fellowship training programs. But, not all of them are proficient nor have the expertise. This depends on the number of aortic valve replacements done by a particular cv surgeon. One may rightly though rarely be classified as a specialist if the experience is limited to aortic valve replacement.