Mitral valve stenosis can be treated using percutaneous (keyhole), minimally invasive or standard surgery. Keyhole techniques, where a balloon is inflated inside the valve via a wire in the groin (balloon valvotomy), are the first line of treatment if the mitral valve is not heavily calcified. This can be repeated as needed over several years.
You can only mount a tire of equivalent load or higher load than indicated for your vehicle. The higher the tire's load index number, the greater its load carrying capacity. Typically, the load indexes of the tires used on passenger cars and light trucks range from 70 to 130. See full table
They recommend 2.7 PSI. That's hard to read accurately when 1/2 psi difference makes it pull. The tire itself says 30 PSI MAX! The tires had 10 psi and it rides OK and steers good. We dropped to 4 PSI and the tires are louder even on gravel and it's harder to turn the handlebars. Some run their tires nearly flat.