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20 Cards in this Set
- Front
- Back
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What are the 11 steps for evaluating an EKG?
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1. Evaluate rythm and frequency
2. Evaluate intervals and blocks 3. Evaluate an Atipical Branch Block or Wolff-Parkinson-White 4. Evaluate elevation or depression of the ST segment 5. Evaluate Q waves 6. Evaluate P waves 7. Evaluate LVH and RVH 8. Evaluate T waves 9. Evaluate Axis 10. Evaluate other anomalies 11. Evaluate type of Arrythmia if present |
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Where do you evaluate rythm?
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Leads V1 and II
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Where do you evaluate branch blocks?
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Leads V1 and V2
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In a Sinus rythm, the P wave is always positive in what Lead(s)?
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Lead II
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What are the caracteristics of a Sinus rythm?
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1. BPM: 60-100
2. RR intervals equidistant to each other 3. PP intervals equidistant to each other and simmetrical to RR intervals 4. Positive P wave in Lead II |
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What is the normal duration of a PR interval?
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0.12-0.20 seconds
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What is the normal duration of a QRS complex?
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0.05-0.10 seconds
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What size are normal R waves?
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-V1: 0-15 mm ages 12-20
-V1: 0-8 mm ages 21-30 -V1: 0-6 mm ages >30 -V2: 0.2-12 mm ages >30 -V3: 1-20 mm ages >30 |
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What are the characteristics of a normal ST segment?
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-Isoelectric, or:
-<1 mm in aVF, aVL and aVR -<2 mm in Precordial Leads |
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What are the characteristics of a T wave?
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-Inverted in aVR
-Variable in III, aVF, aVL, V1 and V2 |
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What are the values of the normal heart axis?
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1. 0-100 degrees ages <40
2. -30 to +90 degrees ages >40 |
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What normal variable does the length of the QT interval rely on?
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Heart Rate
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What are the normalvalues for the QT interval for males?
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1. <0.47 if HR is 45-65 bpm
2. <0.41 if HR is 66-100 bpm 3. <0.36 if HR is >100 bpm |
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What are the normalvalues for the QT interval for females?
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1. <0.48 if HR is 45-65 bpm
2. <0.43 if HR is 66-100 bpm 3. <0.37 if HR is >100 bpm |
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What are the EKG characteristics of a 1st degree AV block?
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PR interval >0.2 seconds
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What are the EKG characteristics of a Left Bundle Branch Block?
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1. QRS complex >0.11 in V1 and V6
2. Small QS or R wave in V1 and V2 3. Nudged R wave in I, V5 and V6 |
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What are the EKG characteristics of a Right Bundle Branch Block?
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1. QRS complex >0.11 in V1 and V6
2. "M" shaped QRS complex in V1 3. Wide S wave in I, V5 and V6 |
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What are the EKG characteristics of a WPW?
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1. QRS complex >0.11 in V1 and V6
2. High R waves in V1 and V2 3. PR interval <0.12 seconds 4. Delta wave present 3. Other Atipical Characteristics |
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What Dangerous case can the WPW be confused with?
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Inferior MI
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If there is a conduction problem and you have ruled out LBBB, RBBB and WPW, what would be your diagnosis?
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Inespecific Intraventricular conduction delay
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