Key result
Tunnel subaortic stenosis surgery leaves 100% of patients with severe residual gradients and high sudden death risk.
Why the study?
Tunnel subaortic stenosis is an unusual form of left ventricular outflow obstruction with unclear clinical and morphologic characteristics and uncertain operative outcomes.
Observational (n=11)
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Persistent high gradients and sudden deaths warrant caution in surgical management of tunnel subaortic stenosis; hypothesis-generating for better strategies in this rare entity.
Maron et al. (1976) conducted an observational in Tunnel subaortic stenosis (n=11). Surgical operation was evaluated on Postoperative outflow gradient and mortality. In 11 patients with tunnel subaortic stenosis, all 7 operated patients had postoperative outflow gradients of ≥50 mm Hg, and 3 patients died suddenly despite mild or no symptoms.
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