week 9 PT monitor tech Flashcards
Electrodes 2 jobs:
= stick & conduct (Electrodes sealed, skin prep_
RA lead site
LA lead site
LL lead site
RL lead site
Distance needs to be=
= Right Arm (medial forearm)
= Left Arm (medial forearm)
= Left Leg (medial inside calf)
= Right Leg (medial inside calf)
= equal/same distance of other limb leads EX 6ft RA-LA same as LL-RL
Positive electrode = what flex on ekg:& vice versa: LL & lead 2 +,
Positive charges look at what side of heart:
= + flex on ekg: LL & lead 2 positive
=+ charges look at inferior side of heart
Positive electrode makes wave:
Negative electrode makes wave:
= makes inverted wave “U”
= makes wave positive “/"
!!!Einthoven’s triangle: green electrode:
Blue electrode:
Red electrode:
= neutral/ground
= Negative
= Positive
!!!Einthoven’s triangle: Lead 1 & view:
Lead 2 & view:
Lead 3 & view:
= negative RA → positive LA (Left lateral camera view)
= negative RA→ positive LL (Inferior camera view)
= negative LA→ positive LL (slight lateral Inferior camera view)
!!!Einthoven’s triangle) Negitive & Positive lead 1 sites:
Negitive & Positive lead 2 sites:
Negitive & Positive lead 3 sites:
=negative @ RA & positive @ LA
= negative @ RA & positive @ LL
= negative @ LA & positive @ LL
(Einthoven’s triangle) BiPolar Limb Leads:
= 2 electrodes, + & -, “+looks to -”,
Unipolar Limb Leads:
aVR:
aVL:
aVF:
= Augmented by the cardiac monitor
= Right Arm positive (inferior)
= Left Arm positive (lateral )
= Left Leg positive (inferior)
Unipolar Precordial Lead “12 leads”:> V1 site:
V2 site:
V4 site:
V3 site:
V5 site:
V6 site:
V4R site:
V5/V8 site:
V6/V9 site:
=(anterior) 4th ICS(between 4th&5th ~1inch R of sternum)
=(anterior) 4th ICS ~1inch L of the Sternum
=(anterior) 5th ICS Midclavicular (left breast)
=(anterior) ½ way in between V2&4
=(anterior) 5th ICS Anterior Axillary
=(anterior) 5th ICS Mid Axillary
=(anterior) 5th ICS Midclavicular
=(posterior) 5th ICS Mid-Scapular
=(posterior) ½ way in-between Scapula & Spine
Vaughan-Williams Antiarrhythmic Classifications: Class, Medication, ECG Effects> NA Channel Blockers
Beta-Blockers:
Potassium Channel Blockers:
Calcium Channel Blockers:
Miscellaneous:
=class 1A&B, Procainamide & Lidocaine, Widen QRS & Prolongs QT
=class II, Propranolol, Prolonged PR & Bradycardias
= class III, Amiodarone, Prolonged QT
= class IV, Diltiazem & Verapamil, Prolonged QT & Bradycardias
=Miscellaneous, Adenosine & Digoxin, Prolonged QT & Bradycardia
Horizontal Boxes: Each small box ?secs:
5 small boxes equal:
Each large box is ?secs:
= 0.04 sec
= 1 large box
= 0.20 sec
Vertical Boxes Each small box is:
Each small box also equals:
5 small boxes equal:
Each large box is:
2 large boxes equal: 1 mV
= 0.1mV
= 1 mm
= 1 large box
= 0.5 mV
= 1 mV
ECG Heart waves – P wave:
QRS complex:
T wave:
= Atrial depolarization
= Ventricular depolarization
= Repolarization of ventricles
P Wave- Morphology:
Interval P Wave Duration:
PRI wave duration:
Amplitude in the limb leads:
Amplitude in the precordial leads:
= Smooth hump, Upright in limb lead:1-3, Biphasic(2 waved) in V1, should have same morphology (in same view)
= <0.12secs
= 0.12-0.20secs 3-5 small boxes >5 boxes (Atrium depolarizing)=
= < 2.5 mm in the limb leads
= < 1.5 mm in the precordial leads