Other ECG

Question 1

Pericarditis appears as what on ECG?

Answer 1

Upright/elevated T waves

Elevated/Flat or Concave ST seg in many leads (MI ST changes U in just a few leads)

Question 2

Pericarditis w/ effusion appears as what on ECG?

Answer 2

low voltage in all leads (fluid in way of signal)

(P) Electrical Alterans (if heart rotates in fluid) ->
QRS amp ∆s

Question 3

PE affects heart how?

Answer 3

Blocked pulm artery causes R heart failure

Question 4

Typical outward signs on PE?

Answer 4

sinus tachy

(P) distention of RA and RV

Question 5

PE appears as what on ECG?

Answer 5

SI Q3 T3:

Large S wave, lead I
Deep Q wave, lead III
Inverted T wave, lead III

Question 6

PE may also cause what other findings on ECG?

Answer 6

RAD
RAE signs: Tall/peak P in II, III, aVF
RBBB V1-3
Inverted T waves V1-4

Question 7

Long QT Syndrome is?

Answer 7

congenital delayed repol a/w vent dysrhy

(U) w/ exercise

(P) v fib, torsdes

Question 8

Short QT Synd is?

Answer 8

inherited

syncope, v arrhy, sudden death

Question 9

QTc Interval is?

Answer 9

“Corrected QT interval”

Question 10

HyperK+ appears as what on ECG? (5)

Answer 10

Tall/Peaked T waves, all leads

Flat P waves

1st° AV block

Wide QRS

Merged ST waves -> sine-wave pattern

Question 11

HypoK+ appears as what on ECG? (3)

Answer 11

U waves*

Flat T waves

ST seg depression

Question 12

HyperCa2+ appears as what on ECG?

Answer 12

↓ refractory period:

Short QT interval*
Short ST seg

↓ auto, slowed conduction:

Wide PR interval
Wide QRS
BBB
AV block

Question 13

HypoCa2+ appears as what on ECG?

Answer 13

Wide QT interval

(P) progression to v tachy/torsades

Question 14

Digoxin affects what electrolytes?

How?

Answer 14

Na+/Ca2+ during depol/repol

Slows Na+ into cell
Helps Ca2+ move out of cell

Question 15

Digoxin affects heart how?

Answer 15

↑ contract/pumping

↓ HR/AV conduct

Question 16

Therapeutic Digoxin causes what ∆s on ECG?

Answer 16

(slows SA and AV node conduction)

Short QT interval
Flat T waves
Asym ST depression/T wave inversion (slopes down to right) w/ tall R wave

Question 17

Toxic Digoxin causes what ∆s on ECG?

Answer 17

conduction block and/or tachy dysrhy
Most common = PAT w/ 2° AV block (2:1)

worse w/ hypoK+

Question 18

Wide QT intervals caused by what drugs?

Answer 18

Anti-arrhy (stop if QTI > 25% wider)
TCA
Phenothiazines
Erythromycin

Question 19

Hyopthermia appears as what on ECG?

Answer 19

All intervals prolonged
Arrhy (brady is common)

Osborne Waves:
ST seg elevation, abrupt ascent at J point, deep plunge

Question 20

Brugada Synd is?

Answer 20

auto dominant
young asains
sudden death from v fib or v tachy

Hx of arrhy, fainting

Tx: ICD

variable ST seg elevations