2. Classification( By initial changes) y artery left nary artery ary ve Blood volume ypovolemIc Right lung Acute heart pump↓ capitales A Vena covo Cardiogenic Ⅴ ascular capacity↑ Ⅴ isogenIc~ Bp=Co×SⅤRAcute heart pump↓ Cardiogenic ~ Vascular capacity↑ Vasogenic ~ 2. Classification ( By initial changes) Bp = CO × SVR Blood volume↓ Hypovolemic~