PRELOAD
The amount the heart has to stretch when ed with blood during diastole
↳ End diastolic volume (EDV)
↳ Central venous pressure (CVP)
○ 2-6 mmHg
○ Central Line → superior vena cava
↳ Hemorrhage ↳ Heart failure
↳ Massive Peripheral Vasodilation (SHOCK) ↳ Renal failure
↳ Dehydration ↳ Fluid Overload
↳ ↓ CO ↳ ↑ BP
↳ ↓ BP ↳ Vasocongestion
↳ Pulmonary edema
↳ ↓ Perfusion
↳ Isotonic uids ↳ Diuretics
↳ Blood products ○ Furosem
○ Bumetan
↳ ACE inhibitors
○ Capto
○ Lisino
○ Quina
AFTERLOAD
The resistance the heart has to pump against to eject blood during systole.
● Pulmonary Vascular Resistance (PVR)
● Systemic Vascular Resistance (SVR)
○ 800-1400 dynes/sec/cm-5