EKG Rhythms & causes
EKG Rhythms & causes
Study online at https://quizlet.com/_hox0mr
1. Normal Sinus Rhythm
2. Sinus Bradycardia
Regular rhythm
HR <60bpm
Causes: sleep, hypothermia, hypothyroidism
3. Sinus tachycardia
Regular rhythm
HR 101-180bpm
Causes: exercise, fever, pain, anxiety, caffeine
4. Premature atrial contractions (PACs)
interrupts underlying rhythm
Causes: emotional stress, tobacco, alcohol, caffeine,
hypoxia, hyperthyroidism, CPOD
5. Atrial Flutter
Sawtooth patter
Causes: HTN, chronic lung disease, hyperthyroidism,
cardiomyopathy
6. Atrial Fibrillation
Causes: HF, pericarditis, alcohol intoxication, caffeine,
stress
7. Supraventricular Ventricular Tachycardia (SVT)
FAST- usually >160bpm
Causes: COPD, HF, stimulant drug use (meth, cocaine),
intense physical exertion
8. Junctional
HR: 40-60bpm
1/6
, EKG Rhythms & causes
EKG Rhythms & causes
Study online at https://quizlet.com/_hox0mr
P waves: may follow QRS, be inverted, or absent
Causes: HF, cardiomyopathy, inferior MI, rheumatic
heart disease
9. 1st degree AV block
PR interval >0.2 sec
Causes: rheumatic fever, vagal stimulation
10. 2nd Degree AV Block (Mobitz 1 or Wenckebach)
Successively longer PR intervals until one QRS fails
(drops a beat)
Causes: Digoxin & B-Blockers
11. 2nd Degree AV Block (Mobitz II)
PR intervals do not lengthen
Causes: rheumatic heart disease, CAD, drug toxicity
12. 3rd Degree AV Block
No association between atria & ventricles
Causes: myocarditis, cardiomyopathy,
13. Premature Ventricular Contraction (PVC)
Wide ventricular complex
Causes: Stress, nicotine, caffeine
14. Ventricular Tachycardia (V Tach)
HR: 150-250 ventricular bpm
Causes: significant electrolyte imbalances, drug toxic-
ity
15. Ventricular Fibrillation (V Fib)
HR: immeasurable
2/6
EKG Rhythms & causes
Study online at https://quizlet.com/_hox0mr
1. Normal Sinus Rhythm
2. Sinus Bradycardia
Regular rhythm
HR <60bpm
Causes: sleep, hypothermia, hypothyroidism
3. Sinus tachycardia
Regular rhythm
HR 101-180bpm
Causes: exercise, fever, pain, anxiety, caffeine
4. Premature atrial contractions (PACs)
interrupts underlying rhythm
Causes: emotional stress, tobacco, alcohol, caffeine,
hypoxia, hyperthyroidism, CPOD
5. Atrial Flutter
Sawtooth patter
Causes: HTN, chronic lung disease, hyperthyroidism,
cardiomyopathy
6. Atrial Fibrillation
Causes: HF, pericarditis, alcohol intoxication, caffeine,
stress
7. Supraventricular Ventricular Tachycardia (SVT)
FAST- usually >160bpm
Causes: COPD, HF, stimulant drug use (meth, cocaine),
intense physical exertion
8. Junctional
HR: 40-60bpm
1/6
, EKG Rhythms & causes
EKG Rhythms & causes
Study online at https://quizlet.com/_hox0mr
P waves: may follow QRS, be inverted, or absent
Causes: HF, cardiomyopathy, inferior MI, rheumatic
heart disease
9. 1st degree AV block
PR interval >0.2 sec
Causes: rheumatic fever, vagal stimulation
10. 2nd Degree AV Block (Mobitz 1 or Wenckebach)
Successively longer PR intervals until one QRS fails
(drops a beat)
Causes: Digoxin & B-Blockers
11. 2nd Degree AV Block (Mobitz II)
PR intervals do not lengthen
Causes: rheumatic heart disease, CAD, drug toxicity
12. 3rd Degree AV Block
No association between atria & ventricles
Causes: myocarditis, cardiomyopathy,
13. Premature Ventricular Contraction (PVC)
Wide ventricular complex
Causes: Stress, nicotine, caffeine
14. Ventricular Tachycardia (V Tach)
HR: 150-250 ventricular bpm
Causes: significant electrolyte imbalances, drug toxic-
ity
15. Ventricular Fibrillation (V Fib)
HR: immeasurable
2/6
