Cardiac Dysrhythmias Exam Questions and Answers.

Cardiac Dysrhythmias Exam
Questions and Answers
6 questions for EKG analysis - Correct Answers: -Is it regular?

-Does every P have a QRS and does every QRS have a P?

-What is the Rate?

-Is the PR interval WNL?

-Is the QRS WNL?

-Is the ST segment prolonged, short or elevated?



Normal heart rate - Correct Answers: 60-100 bpm



Normal PR interval length - Correct Answers: 0.12-0.20 sec



1 small box on the EKG is - Correct Answers: 0.04 sec



1 big box is on the EKG is - Correct Answers: 0.20 sec



30 big boxes on the EKG are - Correct Answers: 6 sec



To determine HR on the EKG - Correct Answers: count the R waves in 6 sec and multiply by 10



Normal QRS length - Correct Answers: < 0.12 or equal to 0.12



Normal ST segment - Correct Answers: 0.08 to 0.12, not elevated



Normal sinus rhythm - Correct Answers: -regular

-every P has a QRS

, -rate 70 bpm

-PR interval is 0.20, WNL

-QRS length is 0.04 WNL

-ST segment is 0.08, WNL



Sinus Tachycardia - Correct Answers: -regular

-every P has a QRS

-rate 140 bpm (high)

-PR interval is 0.12, WNL

-QRS length is 0.04 WNL

-ST segment is 0.08, WNL

TX: only if symptomatic, treat underlying cause



Sinus Bradycardia - Correct Answers: -regular

-every P has a QRS

-rate <60 bpm

-PR WNL

-QRS length WNL

-ST segment is WNL

TX: only if symptomatic, IV atropine or isoproterenol, and/or pacemaker



Premature Atrial Beat - Correct Answers: Result of an irritable ectopic electrical impulse from with in the
atria is initiated early.

-Rhythm: irregular

-every P has a QRS - no there will be extra p waves, some may be hidden

-rate - can be WNL, <60, or >100

-PR WNL

-QRS length WNL

-ST segment is WNL