Cardiac Function Flashcards
Normal CVP Value
4-10 mmHg
CVP = Right atrial pressure
Cardiac Output (CO) Defined
Amount of blood pumped out of heart each minute
Normal Cardiac Output (CO) Value
5 - 6 L/min
Cardiac Index (CI) Defined
Measure of Cardiac Output relative to body surface area
Normal Cardiac Index (CI) Value
2.8 - 3.3 L/min
Cardiac Index (CI) < 2.2
Bad perfusion of tissue
Stroke Volume (SV) Defined
Amount of blood ejected with each contraction of left ventricle
End-Diastolic Volume (EDV) Defined
Volume of blood in ventricle prior to ejection
End-Systolic Volume (ESV) Defined
Amount of blood remaining in ventricle after ejection
Cardiac Conduction - P-Wave
Atrial Depolarization
Normal PR Interval Duration
0.12 - 0.20 secs
Cardiac Conduction - QRS Complex
Ventricular Depolarization
Normal QRS Complex Duration
0.08 - 0.12 secs
Normal QT Segment Duration
0.36 - 0.44 secs
Cardiac Conduction - T-Wave
Ventricular Repolarization
Torsades de Pointe - length of QT interval
QT Interval ≥ 0.5 secs
EKG - tall peaked T-Wave Clinical Manifestations
hyperkalemia
EKG - U-Wave Clinical Manifestations
Low heart rate and hypokalemia
EKG - T-Wave Inversion Clinical Manifestations
Myocardial Ischemia
Normal Ejection Fraction (EF)
55% - 80%
Abnormal Ejection Fraction (EF)
40% - 50%
Preload defined
Volume of blood in the heart
Afterload defined
Impedance opposing ejection of blood from L. Vent (aortic valve)
