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Hemodynamics :)
Hemodynamics made easy
| Question | Answer |
|---|---|
| Blood pressure | a. Normal Systolic = 90-140 b. Normal Diastolic = 60-90 c. As BP increases CO & CI usually decrease b. As BP decreases CO and CI usually increase |
| Pulse Pressure | a. Systolic BP minus Diastolic BP b. Normal = 40 mmHg c. greater than 40 indicates decreased Stroke Volume (SV) |
| SV (Stroke Volume): | a. Cardiac Output divided by Heart Rate b. Normal = 60 – 130 ml/beat c. It's the volume ejected per beat |
| CO (Cardiac Output): | a. Heart Rate times SV b. Normal = 4.8 LPM c. More reliable than Mean Airway Pressure (MAP) |
| CI (Cardiac Index): | a. Cardiac Output divided by Body Surface Area (BSA) b. Normal = 2.5 LPMm2 or simply CO/2 c. Decreased with shock, dehydration, cardiac fail, PE. d. Increased with hypoxia, low BP. e. More reliable measurement than CO. |
| EF(Ejection Fraction): | a. % of blood volume pushed out of heart per beat. b. Normal = 65 – 75% c. Reduced with ventricular damage |
| MAP (Mean Arterial Pressure): | a. systolic BP + (Diastolic*2)/3 b. Normal = 70 – 105 |
| Define Preload | Blood that returns to ventricles at end diastolic, & refers to stretch of myocardial fibers after it is filled with blood. |
| PCWP (Pulmonary Capilary Wedge Pressure | 1. Measures left heart function 2. Normal = 5 – 12 mmHg (same as PAP diastolic) 3. greater than 18 = edema forming in lungs (if no signs CHF think ARDS) 4. greater than 25 = edema in lungs from left heart failure (CHF) 5. greater t |
Created by:
Stefgarner
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