Cardiac Rhythms and Dysrhythmias Comprehensive Question and Answer
Session with a Perfect 100% Accuracy, 2025
Normal sinus rhythm - (ANSWER)Rate: 60-100 bpm
Rhythm: regular
P: QRS: 1:1
PR Interval: 0.12-.20 seconds
QRS complex: 0.06-0.10 seconds
Management: None; heart rhythm is normal
Sinus arrhythmia - (ANSWER)Rate: 60-100 bpm
Rhythm: irregular, varying with respirations
P: QRS: 1:1
PR Interval: 0.12-.20 seconds
QRS complex: 0.06-0.10 seconds
Management: Generally none; considered a normal rhythm in the very young and very old
你是想要一篇“眼睛容易阅读的”
中文文章，还是一篇关于“眼睛”
Sinus tachycardia - (ANSWER)Rate: 101-150 bpm
Rhythm: regular 主题的中文文章？
P: QRS: 1:1 (with very fast rates, P wave may be hidden in preceding T wave)
PR Interval: 0.12-2.0 seconds
QRS complex: 0.06-0.10 seconds
Management: Treated only if symptomatic or patient is at risk for myocardial damage. Treat
underlying cause (e.g. hypovolemia, fever, pain). Beta-blockers or verapamil may be used.
Sinus bardycardia - (ANSWER)Rate: <60 bpm
Rhythm: regular
P: QRS: 1:1
, PR Interval: 0.12-0.20 seconds
QRS complex: 0.06-0.10 seconds
Management: Treated only if symptomatic. Intravenous atropine or isoproterenol, and/or
pacemaker therapy may be used
Premature atrial contractions (PACs) - (ANSWER)Rate: variable
Rhythm: irregular, with normal rhythm interrupted by early beats arising in the atria
P:QRS: 1:1
PR interval: 0.12-0.20 seconds but may be prolonged
QRS complex: 0.06-0.10 seconds
Management: Usually require no treatment. Advise to reduce alcohol and caffeine intake, to
reduce stress, and to stop smoking. Beta-blocker may be prescribed.
Paroxysmal supraventricular tachycardia (PSVT) - (ANSWER)Rate: 100-280 bpm (usually 150-
200 bpm)
Rhythm: regular
P:QRS: P waves often no identifiable
PR interval: no measured 你是想要一篇“眼睛容易阅读的”
QRS complex: 0.06-0.10 seconds
中文文章，还是一篇关于“眼睛”
Management: Treat if symptomatic.
主题的中文文章？Treatment may include vagal maneuvers (Valsalva, carotid
sinus massage); oxygen therapy; adenosine or a beta-blocker; temporary pacing, or synchronized
cardioversion.
Atrial Flutter - (ANSWER)Rate: atrial 240-360 bpm; ventricular rate depends on degree of AV
block and usually is <150 bpm.
Rhythm: atrial regular; ventricular usually regular
P:QRS: 2:1, 4:1, 6:1; may vary
PR Interval: not measured
QRS complex: 0.06-0.10 seconds
Session with a Perfect 100% Accuracy, 2025
Normal sinus rhythm - (ANSWER)Rate: 60-100 bpm
Rhythm: regular
P: QRS: 1:1
PR Interval: 0.12-.20 seconds
QRS complex: 0.06-0.10 seconds
Management: None; heart rhythm is normal
Sinus arrhythmia - (ANSWER)Rate: 60-100 bpm
Rhythm: irregular, varying with respirations
P: QRS: 1:1
PR Interval: 0.12-.20 seconds
QRS complex: 0.06-0.10 seconds
Management: Generally none; considered a normal rhythm in the very young and very old
你是想要一篇“眼睛容易阅读的”
中文文章，还是一篇关于“眼睛”
Sinus tachycardia - (ANSWER)Rate: 101-150 bpm
Rhythm: regular 主题的中文文章？
P: QRS: 1:1 (with very fast rates, P wave may be hidden in preceding T wave)
PR Interval: 0.12-2.0 seconds
QRS complex: 0.06-0.10 seconds
Management: Treated only if symptomatic or patient is at risk for myocardial damage. Treat
underlying cause (e.g. hypovolemia, fever, pain). Beta-blockers or verapamil may be used.
Sinus bardycardia - (ANSWER)Rate: <60 bpm
Rhythm: regular
P: QRS: 1:1
, PR Interval: 0.12-0.20 seconds
QRS complex: 0.06-0.10 seconds
Management: Treated only if symptomatic. Intravenous atropine or isoproterenol, and/or
pacemaker therapy may be used
Premature atrial contractions (PACs) - (ANSWER)Rate: variable
Rhythm: irregular, with normal rhythm interrupted by early beats arising in the atria
P:QRS: 1:1
PR interval: 0.12-0.20 seconds but may be prolonged
QRS complex: 0.06-0.10 seconds
Management: Usually require no treatment. Advise to reduce alcohol and caffeine intake, to
reduce stress, and to stop smoking. Beta-blocker may be prescribed.
Paroxysmal supraventricular tachycardia (PSVT) - (ANSWER)Rate: 100-280 bpm (usually 150-
200 bpm)
Rhythm: regular
P:QRS: P waves often no identifiable
PR interval: no measured 你是想要一篇“眼睛容易阅读的”
QRS complex: 0.06-0.10 seconds
中文文章，还是一篇关于“眼睛”
Management: Treat if symptomatic.
主题的中文文章？Treatment may include vagal maneuvers (Valsalva, carotid
sinus massage); oxygen therapy; adenosine or a beta-blocker; temporary pacing, or synchronized
cardioversion.
Atrial Flutter - (ANSWER)Rate: atrial 240-360 bpm; ventricular rate depends on degree of AV
block and usually is <150 bpm.
Rhythm: atrial regular; ventricular usually regular
P:QRS: 2:1, 4:1, 6:1; may vary
PR Interval: not measured
QRS complex: 0.06-0.10 seconds
