Relias Dysrhythmia Basic Test Bank 2026 – Cardiac Nursing Study Guide

Relias Dysrhythmia Basic Test Bank 2026-2027

Sinus Tachycardia
Rate: 100-150 bpm
Rhythm: Regular
P Wave: Normal, precedes each QRS
PR Interval: 0.12-0.20 sec
QRS: <0.12 sec
Interpretation: Sinus tachycardia
Treatment: Identify and treat underlying cause

ECG Tracing:

text
P P P P P P P P P P P P
↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑
|-----|-----|-----|-----|-----|-----|-----|
R R R R R R R R R R R R
↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓
|-----|-----|-----|-----|-----|-----|-----|
T T T T T T T T T T T T




Sinus Bradycardia
Rate: <60 bpm
Rhythm: Regular
P Wave: Normal, precedes each QRS
PR Interval: 0.12-0.20 sec
QRS: <0.12 sec
Interpretation: Sinus bradycardia
Treatment: Atropine if symptomatic, pacing if severe

ECG Tracing:

text

, P P P P P P P P
↑ ↑ ↑ ↑
|-----------|-----------|-----------|
R R R R R R R R
↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓
|-----------|-----------|-----------|
T T T T T T T T




Atrial Fibrillation
Rate: 100-160 bpm (ventricular)
Rhythm: Irregularly irregular
P Wave: Absent, fibrillatory (f) waves
PR Interval: Not measurable
QRS: <0.12 sec
Interpretation: Atrial fibrillation
Treatment: Rate control, anticoagulation, cardioversion if unstable

ECG Tracing:

text
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑
R R R R R R R R R R R
↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓
T T T T T T T T T T T
|--|--|--|--|--|--|--|--|--|--|--|--|




Atrial Flutter
Rate: Atrial 250-350 bpm, Ventricular variable
Rhythm: Regular (atrial), variable (ventricular)
P Wave: Sawtooth flutter waves
PR Interval: Not measurable