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26 Cards in this Set
- Front
- Back
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Normal intervals and segments:
PR QRS QT |
PR: <0.2 s
QRS: <0.8 s QT: <0.4 s |
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isoletric is normal in
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PR and ST (flat line)
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chest leads:
V1 V2 |
4th ICS either side of sternum
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chest leads: V4
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5th ICS MCL
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chest leads: V3
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between V2&V4
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chest leads:V6
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5th ICS, mitral area
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chest leads: V5
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5th ICS between V4&V6
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bradycardia
tachycardia |
bradycardia: <60
tachycardia >100 |
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Large box intervals to count on EKG
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300-150-75-60-50
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what does regularly irregular mean?
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RR intervals of different length, but overall pattern is present
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Ex of Regular Regular EKG
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Normal Sinus Rhythm
Sinus Bradycardia Sinus Tachycardia |
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Regularly irregular EKG
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Sinus Arrhythmia
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premature atrial beat
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foci overrides SA node (ex: adrenaline) Pwave different, irregular rate
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what is the EKG sawtooth?
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Atrial flutter, strong ectopic focus
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Irregularly irregular, and pt. needs to be on coumadin is...
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atrial fibrillation
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Hypokalemia causes this..
low O2 much wider QRS |
Premature ventricular contractions
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When must you defibrilate?
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Ventricular Tachycardia
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no normal contractions, blood isn't circulating to organs
death |
ventricular fibrillation
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Conduction abnormalities (4)
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1st degree atrioventricular block
2nd degree atrioventricular block, type 1 2nd degree atrioventricular block, type 2 3rd degree atrioventricular block |
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1st degree atrioventricular bloc
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PR interval is > 0.2
impulse in AV node is delayed, longer than normal pause before ventricular stimulation prolongued PR interval, longer than one large square |
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2nd degree atrioventricular block, type 1
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Mobitz type I Wenckebach
progressively longer PR duration until no PR going, going, gone... |
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2nd degree atrioventricular block, type 2
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Mobitz type II
consistent normal PR, but then punctual Pwave with no QRS ex- 2P:1QRS or 3P:1QRS |
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3rd degree block, or complete
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no relationship between P waves and QRS complex
AV node completely blocked |
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ventricular fibrilation + 3rd degree block =
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not living
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sympathetic
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norep elicits excitatory response from B1 andrenergic receptors in <3
increase SA node pacing increases force of myocardial contraction constricts arteries = increase BP |
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parasympathetic
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ACH activates cholinergic receptors to produce inhibitory effect
decrease SA node pacing decrease force of contraction dialates arteries = BP decrease |
