Monitoring Flashcards
Inferior leads show ischemia
II, III, AVF
RAD
Septal leads show ischemia
VI, V2
LAD
Anterior leads show ischemia:
V3, V4
LAD
Lateral Leads show ischemia:
V5, V6, I, AVL
CxA
QRS complex normal
0.08
QTc normal
<0.45
pwave normal
0.08 sec
CVP reflects
pressure in R atrium
CVP a wave shows
R atrial contraction, just after p wave
a wave absent in
- afib
- ventricular pacing
V wave (CVP) shows
Passive filling of RA, just after T wave begins
Large v waves from
tricuspid regurgitation
increased volume
C wave (CVP)
tricuspid elevation toward atrium during systole and closure of tricuspid valve
Subclavian —>vena cava/RA junction length
10 cm
IJ —>RA jucntion length
R: 15 cm
L: 20 cm
Femoral –>RA Junction length
40 cm
Median basillic –> RA junction length
R: 40 cm
L: 50 cm
When placing PAC, how far in do we lace catheter?
Distance from insertion site –>RA junction + distance from CVP to where tip will reside
Portion of ventricular AP occurs during ST sgement:
End of ventricular depolarization
During sinus arrythmia, what happens to heart rate?
HR increases during inhalation
decreased intrathoracic pressure –>increased venou return –>increased HR
Reflex that may initiate sinus arrythmia:
bainbridge
minimal dose of atropine to treat bradycardia
0.5 mgIV
initial shock for acute episode of afib
cardioversion 100 joules
5 conditions that cause failure to capture
Hypokalemia
Hyperkalemia
Hypocapnia
Hypothermia
MI
RA pressure
1-10 (CVP)
(nickle)
PAP
15-30/5-15
(quarter over dime)
RVP
15-30/0-8
(quarter over nickel)
PAOP
5-15
(dime)
LVP
> 100
(dollar)
PAWP shows
INDIRECT measurement of left arterial pressure
(only accurate if in zone 3 of lung)
Thermodilution - when is CO underestimated?
- inject volume too high
- inject solution too cold
Thermodilution - when is CO over estimated?
- Inject volume too low
- inject solution too hot
- Partially wedged PAC
4.Thrombus on tip of PAC
When is thermodilution unable to predict CO?
- intracardiac shunt
- Tricuspid regurgitation
Characteristics of under-damped system
oscilliations
overestimated SBP
underestimated DBP
2 causes of underdamped system
- stiff tubing
- catheter whip
characteristics of overdamped system
No oscillations
underestimated SBP
overestimated DBP
5 causes of overdamped system
- not enough pressure in bag
- kinked tubing
- loose connection
- clot at catheter tip
- air bubble
aortic regurg on art line
- wide pulse pressure
2.bisferinens pulse
Aortic stenosis on art line
- Narrowed pulse pressure (d/t obstructed outflow)
- Delayed, slurred upstroke
- Altered or absent dicrotic notch
- overdamped features
burst suppression occurs during
deep general anesthesia
beta waves associated with
light anesthesia
theta waves associated with
children
general anesthesia
Delta waves associated with
general anesthesia
brain ischemia/injury
deep sleep
during induction of GA, ____ brain waves occur
increased beta waves
deep anesthesia is associated with ____ on ECG
burst suppression
What waves predominate during GA?
theta and delta
MEP anesthesia consideration
no muscle relaxants unless you can reverse what you use to intubate
What should you do if the line isolation monitor alarms?
unplug the last thing you turned in