EKG -- Random flashcard-able thoughts

Question 1

How long should a PR Interval be (in boxes and time)

Answer 1

Under 200 msec

one big box

Question 2

How long should a QRS interval be (in boxes and time)

Answer 2

Under 120 msec

3 small boxes

Question 3

How long should the QT interval be?

Answer 3

Under 500 msec

two and a half big boxes

Question 4

15 big boxes on the EKG =

Answer 4

3 seconds

Question 5

Rhythm with a p in front of all of them

Answer 5

Sinus Rhythm

Question 6

Rhythm described as gravelly

Answer 6

Atrial Fibrillation

Question 7

Rhythm described as sawtooth pattern

Answer 7

Atrial Flutter

Question 8

Rhythm with upside down Ps

Answer 8

Junctional Rhythm

Question 9

A heart with an axis between 0 and 90 is considered….

Answer 9

normal

Question 10

A heart with an axis less than zero is considered…

Answer 10

L Axis Deviated

Question 11

A heart with an axis greater than 90

Answer 11

R Axis Deviated

Question 12

A heart in its normal axis will have which two leads positive

Answer 12

I

aVF

Question 13

If lead two is isoelectric or more negative, the heart is pointed to an area more negative than -30. This is called…

Answer 13

L Anterior Fasicular Block

Question 14

Sinus bradycardia occurs at…

Answer 14

60 bpm

Question 15

Best lead to look for P waves?

Answer 15

V1

Question 16

Sawtooth pattern of atrial flutter is best observed in…

Answer 16

II, III, aVF

Question 17

What happens in atrial flutter with 2:1 conduction

Answer 17

Waves are goign at about 300 bpm, but the sinus can’t depolarize that fast, so it triggers a beat on every other one

Question 18

Isometric precordial lead?

Answer 18

V3

Question 19

RBB and LBB Blocks typically have an upright t wave on which side? a downward wave on which side?

Answer 19

Upward on the side that electricity is moving toward, down on the side its moving away from

Question 20

Other than the T wave changes, what EKG changes are associated with L and R Bundle Block and Why.

Answer 20

Elongation of the QRS (M sign) beyond 120 msec

Delayed conduction coming across the myocardium

Question 21

Type of cardiomyopathy that is louder when standing up?

Answer 21

Hypertrophic Cardiomyopathy

Associated with children

Question 22

What do you see in Left Posterior Fasicular Block?

Answer 22

Still in the normal 0 to 90, but shifts left

Look compared to an old EKG sitting around

Question 23

Four types of AV block

Answer 23

1st d – Fixed PR prolongation
2TI – Gradual PR Prolongation
2TII – Unpredictable AV block
3rd d – AV dissociation

Question 24

Difference in the location of damage for Weinchebach and Mobitz?

Answer 24

W – Above the His/Purkinge

M – Below

Question 25

Steps of Heart attack as seen from EKG (5)

Answer 25

1. Hyperacute T Waves (usually before hospital)
2. ST Elevation (aka Current of Injury
3. Q wave (as cells die)
4. ST return, T wave inversion
5. Loss of R wave

Question 26

EKG finding seen for left ventricular aneurysm?

Answer 26

Persistent ST seg elevation + Q wave

Question 27

What vessel is blocked in an MI seen on leads II, III, aVF

Answer 27

Inferior Leads

Inferior MI = RCA or Distal L Circumflex

Question 28

What vessel is blocked in an MI seen on leads V1-V5

Answer 28

Anteroseptal/anterior leads

LAD

Question 29

What vessel is blocked in an MI seen on leads I, aVL, V6?

Answer 29

Lateral Leads

Proximal L Circumflex

Question 30

ST depression can be used for…

Answer 30

Gauging the size of the MI

Question 31

Sign of previous MI

Answer 31

Q waves

Persistent ST and T wave inversion

Question 32

What should you think of with ST elevation in II, III, aVF and also V5 and V6.

Answer 32

Blockage of the L Circumflex Artery in a L dominant heart