ECG: Ventricular

Question 1

Describe premature ventricular contraction

Answer 1

rhythm: underlying, irregular at PVC
rate: underlying
p waves: underlying, absent at PVC
PR interval: underlying, absent at PVC
QRS complex: underlying, wide and bizarre at PVC (>0.12 sec)

• most common looking rhythym after open heart surgery
• patient wont know they have it
• PVCs could signify increased irritation to ventricles or abnormal lab value (K)

Question 2

Describe Couplet

Answer 2

Two PVCs in a row

Question 3

Describe bigeminy

Answer 3

every other beat is a PVC

Question 4

describe trigeminy

Answer 4

every third beat is a PVC

-the greater the frequency of PVCs, the greater the risk of develpoing VT/VF

Question 5

Describe unifocal PVC

Answer 5

PVC’s look similar to eachother

Question 6

Describe multifocal PVC

Answer 6

PVC’s look different from each other

-could signify increased irritation to the ventricles

Question 7

Describe ventricular tachycardia

Answer 7

rhythm: regular
rate: 100-250
p waves: absent
PR interval: absent
QRS complex: wide and bizarre

• life threatening
• VF/VT: there is reduced or no CO
• find the nearest chair
• NSVT: non-sustained ventricular tachycarida
• ventricle not filling/emptying normally so BP going down

Question 8

Describe ventricular fibrillation

Answer 8

rhythm: absent
rate: absent
p waves: absent
PR interval: absent
QRS complex: absent

-only thing that will help is defibrillation CALL 911

Question 9

Describe idioventricular rhythm

Answer 9

rhythm: regular
rate: 20-40
p waves: absent
PR interval: absent
QRS complex: wide

-dying heart

Question 10

What is the R-on-T phenomena?

Answer 10

• PVC occurs on the T-wave during the relative refractory period
• may lead to VT or VF