Another day off means another post! Let’s make this a quick one on something I pretended to understand but really don’t:

Pulmonary artery catheter waveforms! Don’t you always hate it when the heart failure attending or fellow starts saying yeah the CVP isn’t the one projected in the parenthesis and then starts staring at the screen and says A-wave, V-wave, etc?

Here are the basics first as a reminder. 10–15cm to the subclavian. I like the rule of 6’s; you can use the dimes one too. Up to you. This is all derived from the manufacturer, Edwards, page.