Login Here · Help ·
Public User
2X
I just wanted to let you know that even though I'm looking quite old, I'm still a millenial.
So I just had a "New Year, New Me" moment and my resolution is to become a new and improved version of myself in a couple of weeks.
Don't worry, my wisdom won't change. You're still going to find the same useful information here. Stay tuned!
|
||||
| How to calculate a AVA by Gorlin Formula. | ||||
| CO = 0.785 x LVOTd2 x VTIAV x HR AVG = 4(Vmean)2 AVA = (CO / SEP x HR) / (44.3 x sq root(AVG)) | ||||
| Step 1: Obtain the LVOT Diameter. The ME AVLAX view under zoomed mode is an excellent method to measure the LVOT diameter. Measure the LVOT diameter in mid systole. | ||||
| Step 2: Obtain a CWD of the AV. The optimal view is either the DTG AVLAX or TG AVLAX. Once a flow profile is obtained, trace the envelope to calculate the mean velocity (Vmean) and the VTI. From the flow profile the SEP or systolic ejection period can be measured. | ||||
| Step 3: Enter the Heart Rate. | ||||
| Optional:
Modified Gorlin Formula: AVA = CO / Square Root of Mean AVG. The cardiac output is in liter per minute. For example a CO of 5.4 l/min and a mean AVG of 64 yields 5.4 / sq root(64) = 0.68 cm squared. |
||||
