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standard limb lead
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bipolar leads
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'22 Leads

QuestionAnswer
standard limb lead "bipolar lead" AKA bipolar bc they are composed of 2 electrodes; a neg. and pos. one; ECG records the difference in electrical potential btwn them
bipolar leads same distance from the heart: R. Arm <--> L. Arm R. Arm <--> L. Leg L. Arm <--> L. Leg
what does bipolar leads measure? the electrical activity in 2 directions (<--->)
unipolar leads from the heart to the ____: aVR - R. Arm aVL - L. Arm aVF - L. Foot
augmented limb leads "unipolar lead"
chest leads "precordial leads"
precordial leads unipolar V1-V6 (where you pick up the signal of the heart)
standard & augmented leads and waveforms NOTE: - standard leads l, ll, lll produce POSITIVE deflections on the graph - augmented lead aVR produces a negative deflection - augmented lead aVL & aVF produces a POSITIVE deflection
what are leads? attaches to the electrodes on the body
if electrodes produce NO waveforms, what could be wrong? the electrodes may be misplaced
chest leads and waveforms NOTE: - chest leads/precordial leads V1-V6 provide a view of the heart from different angles
PR interval: represents the complete atrial contraction last (0.12-.20 secs or 3-5 small sq) anything +/- means "abnormal"
QRS complex: represents the complete ventricular depolarization last (0.08-0.12 secs or 2-3 small sq) anything +/- means "abnormal"
12-lead EKG consist of: 4 limb leads (3 limb electrodes & 1 grounding electrode) 6 chest leads (V1-V6) = 10 leads that create 12 waveforms
how many leads in a 12 waveform paper? 10 leads
aVR is placed where and what type of deflection does it have? R. Arm ; negative deflection
aVL is placed where and what type of deflection does it have? L. Arm ; positive deflection
aVF is placed where and what type of deflection does it have? L. Foot (L. leg to the foot) ; positive deflection
Einthoven's triangle triangle formed from the R. A --> L. A --> L.L
difference between unipolar and V1-V6? the placement of the lead
which are the bipolar leads? lead l, ll, lll
lead l includes? (+) R. Arm <---> L. Arm (-)
lead ll includes? (+) R. Arm <--> L. Leg (-)
lead lll includes? (-) L. Arm <--> L. Leg (+)
which leads form the Einthoven's Triangle? the standard limb leads "bipolar leads"
electrodes are? are placed on the pts skins in specific locations that control electrical activity to the ECG - for single use - check for expiration date
if an aVR has a positive deflection, what should be done? make sure that the leads are properly placed
T/F: A multichannel electrocardiograph, such as 3-channel or 6-channel, records multiple leads at once in about 10 seconds T ; Unlike a single-channel ECG, the 3- and 6-channel ECG record multiple leads at once producing a 12-lead ECG in about 10 secs
what are ECG leads? each separate view of the heart
what are the first 3 leads, that uses 2 limb electrodes to record the heart's electrical activity? standard "bipolar" leads (lead l, ll, lll)
what are the 3 leads, that uses 1 limb electrode to record the heart's electrical activity? unipolar leads "augmented lead" (aVR, aVL, aVF)
which leads produces a negative deflection? aVR
which leads produces a positive deflection? lead l, ll, lll & aVL, aVF
where is the 4th or "grounding lead" placed? on the R. leg
what is the grounding lead used for? used to stabilize the ECG but takes NO part in lead formation
In a 12-lead, Color ____ is placed on ____ [Lead] WHITE; Right arm
In a 12-lead, Color ____ is placed on ____ [Lead] BLACK ; Left arm
In a 12-lead, Color ____ is placed on ____ [Lead] GREEN ; Right leg
In a 12-lead, Color ____ is placed on ____ [Lead] RED ; Left leg
In a 12-lead, Color ____ is placed on ____ [V1] RED ; Right sternal border, 4th intercostal space
In a 12-lead, Color ____ is placed on ____ [V2] YELLOW ; Left sternal border, 4th intercostal space
In a 12-lead, Color ____ is placed on ____ [V]3 GREEN; midway between V2-V4
In a 12-lead, Color ____ is placed on ____ [V4] BLUE; Midclavicular line, 5th intercostal space
In a 12-lead, Color ____ is placed on ____ [V5] ORANGE; Aligned with V4 at anterior axillary line
In a 12-lead, Color ____ is placed on ____ [V6] PURPLE; In line with V4 and V5 at mid-axillary line
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Created by: nidromcom
 

 



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