Prehospital 12-lead EKG acquisition and acute coronary syndrome recognition concepts tested on paramedic certification exams.
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- Where is the V1 electrode placed in a 12-lead EKG?
- 4th intercostal space, right sternal border
- Where is the V2 electrode placed in a 12-lead EKG?
- 4th intercostal space, left sternal border
- Where is the V3 electrode placed in a 12-lead EKG?
- Midway between V2 and V4
- Where is the V4 electrode placed in a 12-lead EKG?
- 5th intercostal space, left midclavicular line
- Where is the V5 electrode placed in a 12-lead EKG?
- Left anterior axillary line, level with V4
- Where is the V6 electrode placed in a 12-lead EKG?
- Left midaxillary line, level with V4 and V5
- Where is the RA (right arm) limb electrode placed?
- On the right arm or right shoulder
- Where is the LA (left arm) limb electrode placed?
- On the left arm or left shoulder
- Where is the LL (left leg) limb electrode placed?
- On the left leg
- What is the purpose of the V4R lead?
- To detect right ventricular infarction
- How is the V4R electrode positioned relative to V4?
- In the mirror-image position on the right side of the chest (5th intercostal space, right midclavicular line)
- What is the purpose of posterior leads V7 through V9?
- To detect posterior wall myocardial infarction, which the standard 12 leads can miss
- Standard EKG paper speed is ____.
- 25 mm/sec
- Standard EKG calibration is ____.
- 10 mm/mV
- How much time does one small box on EKG paper represent?
- 0.04 seconds (40 ms)