Hi!
Pulmonary hypertension (PH) is defined as a resting mean pulmonary artery pressure of 25 mm Hg or greater measured during right heart catheterization.
(How I remember the number 25 - PH: 2 letters, Hyper: 5 letters).
Classification of Pulmonary Hypertension mnemonic
"A heart lung chronic thrombotic unclarity"
1: pulmonary Arterial hypertension
2: PH due to left-sided heart disease
3: PH due to lung diseases and/or hypoxia
4: Chronic thromboembolic pulmonary hypertension and other pulmonary artery obstructions
5: PH with unclear or multifactorial causes
The transpulmonary pressure gradient (TPG): The difference between mean pulmonary arterial pressure (mPAP) and left atrial pressure (LAP, commonly estimated by pulmonary capillary wedge pressure PCWP).
A TPG of >12 mmHg would result in a diagnosis of “out of proportion” pulmonary hypertension - suggesting intrinsic pulmonary vascular disease in patients with left-heart conditions associated with increased pulmonary venous pressure.
Will update post as I learn more...
-IkaN