Classifications and Key Features of Dysrhythmias (Exam 2)

Question 1

Different ways to classify dysrhythmias

Early
Slow
Fast

Answer 1

Premature complexes (Early)

Bradydysrhythmias (Slow)

Tachydysrhythmias (Fast)

Question 2

Another way to classify dysrhythmias (Site of origin in heart)

Answer 2

Sinus

Atrial

Ventricular

Question 3

Bradydysrhythmias

Answer 3

HR < 60 (sa node)

Question 4

Bradydysrhythmias can be significant because

Answer 4

-Myocardial oxygenation demand is reduced (good)

-Coronary perfusion time may be adequate because of prolonged diastole (good) (coronary arteries are better perfused)

-Coronary perfusion may decrease if rate is too slow (bad)

Question 5

Bradydysrhythmias may be tolerated

Answer 5

patients blood pressure is adequate

Question 6

Bradydysrhythmias with inadequate BP may lead to

Answer 6

-Myocardial ischemia/infarct

-Dysrhythmias

-Hypotension

-Heart Failure

Question 7

Tachydysrhythmias

Answer 7

HR >100

Question 8

Tachydysrhythmias may be significant because

Answer 8

-Shortened diastolic time which shortens coronary perfusion time (bad)

-May Increasore CO and BP (good)
but if this is sustained
= decrease ventricular filling and decrease CO / BP (bad)

Increases workload on heart which increases myocardial demand (bad)

Question 9

Coronary arteries are perfused during

Answer 9

diastole

Question 10

If tachydysrhythmia is not tolerated it can lead to

Answer 10

-MI
-Dysrhythmias
-Hypotension
-Heart failure

Question 11

Key Features of sustained tachy and brady dysrhythmias

Answer 11

-Angina

-Restlessness / anxiety / confusion

-Dizziness / syncope

-Palpitations (tachy)

-Pulse deficit (radial pulse less than apical pulse)

-SOA - tachypnea

-Pulmonary crackles

-Orthopnea (cant breath laying)

-S3 or S4 heart sounds (gallops)

-JVD

-Pale cool skin diaphoresis

-N/V

-Decrease urine output (no perfusion)

-Delayed cap refill

-Hypotension