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Flashcards in Exam 3 Deck (14):
1

pre-excitation syndromes

- electrical current conducted from atria to ventricles more quickly than normal
- bypass AV node
- mainly males
- predisposes pt to tachyarrhythmias

2

what is the bypass pathway in wolff-parkinson- white

- bundle of kent
- can be either L or R sided

3

WPW syndrome

- premature ventricular depol
- shortened PR interval
- delta wave
- wide QRS
- many also experience at least one arrhythmia

4

what pre-excitation syndrome looks similar to v tach?

- WPW and SVT
- reentrant mechanisms goes up AV node and down bundle of kent

5

clinical manifestations of WPW

- mostly asymptomatic
- palpitations
- lightheaded
- syncope or presyncope
- chest pain
- sudden cardiac death- usually with a fib which degrades to v fib

6

pacemaker

- alternate power source controlled by microchip
- connected to electrodes
- placed subcutaneously

7

demand pacemaker

- fires only when intrinsic HR falls below threshold level

8

possible indications for pacemaker

- 3rd degree heart block
- Mobitz II
- symptomatic brady
- pauses > 3sec
- sick sinus rhythm
- afib with RVR
- conduction disorders in MI
- recurrent tacharrhythmias

9

what are the types of pacemakers?

- single chamber atrial
- single chamber ventricular
- dual chamber
- single lead atrial sensing ventricular

10

single chamber atrial pacemaker

- indicated for sinus node dysfunction
- no suspected AV block
- maintains AV synchrony
- simulates a sinus node

11

single chamber ventricular pacemaker

- AV block
- chronic a fib
- other atrial tachyarrhythmias
- rate response available

12

dual chamber pacemakers

- indicated for AV block
- provides AV synchrony
- rate response available

13

single-lead atrial-sensing ventricular pacemaker

- indicated for AV block
- desire to limit number of pacemaker leads
- good option for normal sinus node

14

how can you tell if someone has pacemaker on EKG?

pacer spikes