ECG lecture worksheet

Question 1

Atrial reentry rhythm with a rate of 250 – 350 impulses/min. Typical ‘sawtooth’ pattern

Answer 1

atrial flutter

Question 1

Most common adult rhythm with rates between 60-100bpm. Narrow QRS with upright P

Answer 1

normal sinus rhythm

Question 2

Often results from increased sympathetic stimulation due to pain, medications, fever, hypovolemia

Answer 2

sinus tachycardia

Question 3

Atrial impulse earlier than expected from SA node due to atrial irritability. May see bi-phasic P wave

Answer 3

atrial fibrillation

Question 4

Rapid ominous rhythm characterized by wide QRS complex and no P wave. Caused by acute MI, cardiac drug toxicity, electrolyte imbalance

Answer 4

ventricular tachycardia

Question 5

Chaotic rhythm originating in the ventricles resulting in no cardiac output

Answer 5

ventricular fibrillation

Question 6

Common in athletes who have optimal SV to maintain adequate CO at lower HR

Answer 6

sinus bradycardia

Question 7

P wave is ____________

Answer 7

atrial depolarization

Question 8

PR segment is delay at __________

Answer 8

AV node

Question 9

QRS complex is ventricular _____________

Answer 9

depolarization

Question 10

T wave is ventricular _____________

Answer 10

repolarization