Exam 1 Flashcards
formula for cardiac output
HR X SV
normal value for cardiac output
4 to 8 L/min
formula for mean arterial pressure
[(SBP) +2(DPB)]/3
normal value for mean arterial pressure (MAP)
70 to 900 mm Hg
normal value for mean pulmonary artery pressure (mean PAP)
12 to 20 mm Hg
normal value for pulmonary artery diastolic pressure (PAD)
8 to 15 mm Hg
normal value for pulmonary artery systolic pressure (PAS)
20 to 30 mm Hg
normal value for pulmonary artery wedge pressure (PAWP)
4 to 12 mm Hg
normal value for right atrial pressure (RAP)
2 to 6 mm Hg
normal value for systemic vascular resistance (SVR)
800 to 1200 dynes
normal value for cardiac index (CI)
2.4 to 4.0
stroke volume is influenced by
Preload
After load
Contractility
most accurate MAP is from the
arterial line
indicates arterial depolarization, stimulated by the SA node
P wave
indicates conduction of the impulses form the SA node through the internodal pathway to the AV node and downward to the ventricles
PR interval
reflect ventricular depolarization and arterial repolarization
QRS complex
represents completion of ventricular depolarization and beginning of ventricular repolrization
ST segment
represents repolarization of ventricles
t wave
represents ventricular depolarization and repolarization
QT intervals
normal value for PR interval
0.12- 0.2 sec
If PR is greater than 0.2
represents conduction delay
normal value for QRS complex
less than 0.12 sec
if QRS complex is greater than 0.12 sec
suggests bundle branch block or conduction delay
normal QT interval
less than half of the R-R interval
