Rates + Rhythms

Question 1

Sinus Tach

Answer 1

Originates: SA node
Rate: >100-200
Rhythm: Regular

Question 2

PAC

Answer 2

Originates: Atrium (outside of SA node) Fires before SA
Rate: Any
Rhythm: Irregular or regular (except for event)

Question 3

A-Fib

Answer 3

Originates: Atrium MULTIPLE foci (outside of SA node)
Atrial rate >400bpm Ventricular rate 100-175bpm
Rhythm: Irregularly irregular
No P-wave NO PR

Question 4

A-Flutter

Answer 4

Originates: Atrium SNGLE ectopic foci, reentry impulse (outside SA)
Atrial rate may be >250bpm; Ventricular rate slower

Question 5

PSVT

Answer 5

Originates: Above Ventricle (unknown)
Rate: >130
Rhythm: Regular
P-wave: indiscernible

Question 6

PVC

Answer 6

Originates: Ventricles (single or multiple ectopic foci)
Rate: any
Rhythm: irregular
QRS: Wide + Distorted

Question 7

V-Tach

Answer 7

Originates: SA (3 PVCs) Ectopic takes over pacemaker
Rate: 150-250
Rhythm: Regular or irregular
P-wave unrecognizable 
QRS: wide + distorted

Question 8

V-Fib

Answer 8

Originates: SA multiple ectopic foci
Rate: Not measurable
Rhythm: Not measurable
NO QRS, P, or PR

Question 9

Asystole

Answer 9

Absence of ventricular activity (sometimes P-wave)