Gradient Formula

[sheryl]

I have HOCM and my local cardiologist is referring me to MUSC for evaluation. I am currently researching to find more info on HOCM but I want to know what formula do MD's use to find your gradient. 1) Does anyone know the gradient formula? I do have copies of my echos. I was told my "peak to peak gradient was 40 - 60" during a heart cath but was told my gradient during echo was higher. 2) What is the difference between the echo gradient and the "peak to peak gradient"? Sorry, inquiring minds want to know!
I would appreciate any info regarding this. Sheryl

[mtlieb]

Sheryl,

(LVOT)² x 4 = Gradient (mmHg)

Take your LVOT velocity (in meters/sec), square it, then multiply that number by 4. For example, an LVOT velocity of 6m/s would give you a gradient of 144 expressed in mmHg (millimeters of mercury):

(6)² = 36, x 4 = 144

There's a bit more to it than that, but most technicians and doctors figure it out in their heads using this formula.

Jim

[sheryl]

Thanks Jim for the infomation! Do you know what the peak to peak gradient is during a heart cath? Or how it relates to the gradient during an echo?

[mtlieb]

Sheryl,

I didn't realize until after i posted that this is the Ask the HCMA forum and since i'm neither a moderator or staff member i'm not supposed to answer questions here. Sorry, Lisa!

Can a moderator please address Sheryl's questions please?

Jim

[Reenie]

Jim, I didn't know the answer. You did. No problem here. :)

Reenie