231 Principles Of Electrophysiology

Question 0

Location pacemaker cells

Answer 0

Junction of RA and SVC

Question 1

Most common arrhythmia mechanism

Answer 1

Reentry

Question 2

Delta waves

Answer 2

Wpw

Question 3

Epsilon waves

Answer 3

Arrhythmigenic right ventricular dysplasia

Question 4

Brugada syndrome

Answer 4

Prolongation/ shortening of QT interval

Right precordial st segment abnormalities

Question 5

Signature VT associated with digoxin toxicity

Answer 5

Bidirectional VT

Question 6

Due to delayed ventricular activation in the region of the RV free wall

Answer 6

Epsilon wave

Question 7

Arrhythmogenix RV dysplasia coupled with palmar-palmar keratosis and wooly hair
High risk of SCD in adolescents and young adults

Answer 7

Naxos disease

Question 8

Most common trigger for porentiatjbg cardiac arrhythmias in patients with LQT1

Answer 8

Exercise

Question 9

Most common precipitant for potentiating cardiac arrhythmias in LQT2

Answer 9

Emotional stress

Question 10

2 LQT1 alleles:

More dramatic qt prolongation
Deafness
Worse prognosis

Answer 10

Jervell and lange nielsen syndrome

Question 11

Poorest prognosis of all LQTs

Answer 11

Lqt3

Gene that encodes the cardiac sodium channel on chromosome3

Question 12

Beta blockers not recommended in this qt syndrome
Exercise not restricted:
Occur during sleep

Answer 12

LQT3

Question 13

Ecg triad of

Chronic renal failure

Answer 13

Peaked T
Prolonged QT (hypoCa)
LVH

Question 14

Mc arrhythmia in pulmo embo

Answer 14

Sinus tachycardia

Question 15

An ecg pattern seen in pulmonary embolism

Answer 15

S1 q3 T3

Question 16

Earliest exg hanges ischemi

Answer 16

Hyperacute T waves over ischemic zone

Question 17

Inferior wall ischemia st elevation

Answer 17

II
III
AVF

Question 18

posterior wall ischemia

Answer 18

Reciprocal st depression V1-V3

Question 19

Accounts got depolarized membrane potential of cardiac muscle cells (-40 to -60 mV)

Answer 19

Absence of inward rectiier potassium current (Ik1)

Question 20

Accounts for slow upstroke of phase 0 in cardiac muscle cells

Answer 20

Absence of available fast sodium current,

Mediated by the L tulype alcium current

Question 21

The most rapid conduction in the heart is observed from these tissues

Answer 21

His bundle and bundle branches

Question 22

Distinguishes MAT from AF

Answer 22

Presence of an isoelectric baseline

Question 23

May provide benefit in Rx of MAT

Answer 23

Verapamil

Question 24

Parasympathetic NS effect on the heart

Answer 24

Muscarinic receptors Inc K conductance Slowing rate of phase 4 activation

Question 25

b1 receptor activation on the heart

Answer 25

Stimulate pacemaker cells Increased activity of Funny currents and L type Ca channels Increasing slope of phase 4

Question 26

Very prominent U waves predispose to what arrhythmia

Answer 26

Torsades des pointes

Question 27

Class ibutilide Dofetilide

Answer 27

III

Question 28

Class | Sotalol

Answer 28

Ii and III

Question 29

Class Quinidine Flecainide Procainamide

Answer 29

I and III

Question 30

Class | Propafenone

Answer 30

I and II