What would be your second pressor of choice if patients with LVOT obstruction remain persistently hypotensive on phenylephrine?

In patients with LVOT obstruction who remain hypotensive despite treatment with phenylephrine, choosing an appropriate second pressor requires careful consideration of the hemodynamic goals and the specific pharmacologic properties of available agents. Here are a few points:

While the specific literature on this exact scenario is limited, general principles of hemodynamic management in LVOT obstruction can guide the choice. In LVOT obstruction, especially seen in conditions like hypertrophic cardiomyopathy, the goal is to avoid decreasing the preload and increasing the contractility, as these can exacerbate the obstruction. Phenylephrine, primarily a vasoconstrictor, is often chosen initially due to its ability to increase afterload without...