ventricular arrythmias

Question 1

organized ventricular arrythmias are almost NEVER

Answer 1

caused solely by ischemia

Question 2

Wide complex tachycardia, 120-250 bpm

consistent morphology

Answer 2

monomorphic VT

Question 3

Clues that you have monomorphic VT

Answer 3

aVR is positive -

Question 4

non life-threatening VT

Answer 4

catecholamine sensitive

Question 5

if someone’s had an MI in the past and presents with a wide complex tachy

Answer 5

assume it’s VT

Question 6

which physical finding is useful in VT?

Answer 6

AV dissociation

- cannon A waves variable intensity of S1

Question 7

most important ECG critieria for VT is

Answer 7

AV dissociation

Question 8

monomorphic tachycardia wide complex with a narrow beat in the middle is called

Answer 8

a fusion beat

Question 9

capture beat is

Answer 9

a completely normal QRS in the middle of a monomorphic VT

Question 10

p waves marching through regularly at a set rate

Answer 10

VT

Question 11

the rate in VT is

Answer 11

NOT helpful, can be very fast and be ok

Question 12

a very WIDE QRS (>140ms) suggests

Answer 12

VT

Question 13

3 questions you need to ask if you want to distinguish VT from SVT

Answer 13

• absence of RS in all precordial leads
• > 100ms from onset of R to bottom of S
• cannot look like a LBBB or RBBB

Question 14

most common cause of polymorphic VT

Answer 14

Ischemia

Question 15

signature of polymorphic VT

Answer 15

• sinus rhythm or tachycardia with ST changes

Question 16

3 things that can contribute to polymorphic vt

Answer 16

• significant bradycardia
• hypokalemia
• hypomagnesemia

Question 17

tachycardia + PVC

Answer 17

POlymorphic VT = ischemic

Question 18

sinus + long QT + short-long-short initiation

Answer 18

POlymorphic VT - torsade de pointes

Question 19

monomorphic ECG, very fast > 250 bpm

Answer 19

ventricular flutter

Question 20

treatment for VT

Answer 20

shock

Question 21

dont give an AV nodal blocking agent only

Answer 21

if person has WPW and has a wide complex tachycardia you will precipitate Afib

Question 22

How do you treat monomorphic VT with structural HD

Answer 22

• shock if unstable,

- IV amiodarone

Question 23

magnesium does not help with

Answer 23

monomorphic VT with structural Heart disease

Question 24

how do you treat polymorphic VT WITHOUT Long QT

Answer 24

• IV amiodarone , IV Mg++, Cardiovert

IV beta blocker - block catecholamine response

Question 25

which VT can respond to adenosine, calcium channel or beta blocker?

Answer 25

Mono vt WITHOUT structural HD

Question 26

to treat poly VT WITH long QT

Answer 26

IV Mg++, correct electrolytes, isoproteneral increase heart rate