EKG MEDCA Exam Questions With Correct
Answers 2025\2026 A+ Grade
standard leads
- accurate answers-Leads 1,2,3
Augmented leads
- accurate answers-aVF, aVR, aVL
What leads look at the inferior part of the heart?
- accurate answers-Lead 2, Lead 3 and aVF
What leads look at the left lateral part of the heart?
- accurate answers-Lead 1 and Lead aVL
what leads look at the right side of the heart?
- accurate answers-aVR
What leads are electrically equidistant from the hearts electrical activity?
- accurate answers-leads 1,2,3
Where is aVF placed?
- accurate answers-left foot or lower abdomen
Where is aVR placed?
- accurate answers-right wrist or shoulder
Where is aVL placed?
- accurate answers-left wrist or shoulder
Where is lead 1 placed?
- accurate answers-positive electrode on left arm, negative electrode on r-arm,
records difference between R and L arms
Where is lead 2 placed?
- accurate answers-positive electrode on left leg, negative electrode on right
arm, records difference between r-arm and L-leg
, Where is lead 3 placed?
- accurate answers-positive electrode on L-leg and negative electrode on R-
arm
which one is the reference?
- accurate answers-right leg electrode
where is V1?
- accurate answers-right of sternum, 4th intercostal space
where is V2?
- accurate answers-L- of sternum, 4th intercpstal space
where is V3?
- accurate answers-inbetween V2 and V3
where is V4?
- accurate answers-Midclavicular line, 5th intercostal space
where is V5?
- accurate answers-anterior axillary line between V4 and V6
Where is V6?
- accurate answers-midaxillary line, 5th intercostal space
1mV =___mm
- accurate answers-10mm
1mm=__sec
- accurate answers-.04 seconds
P-wave
- accurate answers-shows atrial depolarization, lasts .08-.1sec, amplitude of
less than .25mV
PR interval
- accurate answers-shows the beginning of the p wave(onset of atrial
depolarization) lasts .12-.20sec
Answers 2025\2026 A+ Grade
standard leads
- accurate answers-Leads 1,2,3
Augmented leads
- accurate answers-aVF, aVR, aVL
What leads look at the inferior part of the heart?
- accurate answers-Lead 2, Lead 3 and aVF
What leads look at the left lateral part of the heart?
- accurate answers-Lead 1 and Lead aVL
what leads look at the right side of the heart?
- accurate answers-aVR
What leads are electrically equidistant from the hearts electrical activity?
- accurate answers-leads 1,2,3
Where is aVF placed?
- accurate answers-left foot or lower abdomen
Where is aVR placed?
- accurate answers-right wrist or shoulder
Where is aVL placed?
- accurate answers-left wrist or shoulder
Where is lead 1 placed?
- accurate answers-positive electrode on left arm, negative electrode on r-arm,
records difference between R and L arms
Where is lead 2 placed?
- accurate answers-positive electrode on left leg, negative electrode on right
arm, records difference between r-arm and L-leg
, Where is lead 3 placed?
- accurate answers-positive electrode on L-leg and negative electrode on R-
arm
which one is the reference?
- accurate answers-right leg electrode
where is V1?
- accurate answers-right of sternum, 4th intercostal space
where is V2?
- accurate answers-L- of sternum, 4th intercpstal space
where is V3?
- accurate answers-inbetween V2 and V3
where is V4?
- accurate answers-Midclavicular line, 5th intercostal space
where is V5?
- accurate answers-anterior axillary line between V4 and V6
Where is V6?
- accurate answers-midaxillary line, 5th intercostal space
1mV =___mm
- accurate answers-10mm
1mm=__sec
- accurate answers-.04 seconds
P-wave
- accurate answers-shows atrial depolarization, lasts .08-.1sec, amplitude of
less than .25mV
PR interval
- accurate answers-shows the beginning of the p wave(onset of atrial
depolarization) lasts .12-.20sec
