Bradyarrhythmias Flashcards Preview

Cardio 2 > Bradyarrhythmias > Flashcards

Flashcards in Bradyarrhythmias Deck (18):
1

2 Sources of Bradys

Disorders of Impulse Formation (sinus brady, sinus sickness, SA exit block)
Disorders of AV Conduction (1-3 deg AV block)

2

2 Pathologic Disorders of Impulse Formation

Fibrosis of sinus node
Drug Induced - BBs, Ca channel blockers, digoxin

3

Sinus Rhythm P Wave (2)

P before QRS
+ in I, II, and vF

4

Wandering Atrial Pacemaker

P wave goes inverse occasionally, maybe from other pacer taking over

5

Sinus Exit Block

No P wave, so get AV junction rhythm or something

6

Sick Sinus Syndrome

Group of arrhythmias which have sinus nodal dysfunction manifesting in periods of sinus bradycardias or pauses

7

Afib QRS

Irregularly regular

8

AV Nodal Block vs. His Purkinje Block Categories

First deg and second deg, Type 1 vs. Second deg, Type 2, High deg AV block, and 3rd deg AV block

9

Decremental Conduction

AV node responds to increased impulses by prolonging conduction/blocking impulses under autonomic control. If by exercise, symp will cause AV conduction to increase. If artificially/(pathologically) set really high, AV will delay conduction for 1st or 2nd deg block

10

First Deg AV Block

Increased PR interval. Each P still followed by QRS

11

Wenckebach

2nd deg Type 1. PR interval longer successively until block

12

2nd Deg AV Block Type 2

Block w/out PR prolongation, usually block in His-Purk so much more dangerous and probably needs pacemaker

13

2:1 AV Block

Second deg, can't tell Type 1 or 2 bc can't see if PR prolongs before block

14

Third Deg AV Block

No relationship b/w P and QRS. Block can be anywhere

15

2 Medical Treatments for Bradys

Withhold AV nodal blocking agent (BBs, Ca channel, digoxin)
Beta agonists

16

2 Pacemaker Types

Single Chamber (VVI) - chronic afib
Dual Chamber (DDD, DDI) - AV block. Tachy/brady syndrome

17

Unipolar vs. Dipolar Pacing

Unipolar has cathode at the end and uses your own tissue/itself as anode vs. has cathode and anode at tip

18

VVI Pacemaker Response to Intrinsic QRS

Inhibited if sensing properly