Term
|
Definition
Normal Sinus Rythm Rhythm - Regular Rate - (60-100 bpm) QRS Duration - Normal P Wave - Visible before each QRS complex P-R Interval - Normal (<5 small Squares. Anything above and this would be 1st degree block) Indicates that the electrical signal is generated by the sinus node and travelling in a normal fashion in the heart.
|
|
|
Term
|
Definition
Sinus Bradycardia Rhythm - Regular Rate - less than 60 beats per minute QRS Duration - Normal P Wave - Visible before each QRS complex P-R Interval - Normal Usually benign and often caused by patients on beta blockers
|
|
|
Term
|
Definition
Sinus Tachycardia Rhythm - Regular Rate - More than 100 beats per minute QRS Duration - Normal P Wave - Visible before each QRS complex P-R Interval - Normal The impulse generating the heart beats are normal, but they are occurring at a faster pace than normal. Seen during exercise
|
|
|
Term
|
Definition
Supraventricular Tachycardia (SVT) Abnormal Rhythm - Regular Rate - 140-220 beats per minute QRS Duration - Usually normal P Wave - Often buried in preceding T wave P-R Interval - Depends on site of supraventricular pacemaker Impulses stimulating the heart are not being generated by the sinus node, but instead are coming from a collection of tissue around and involving the atrioventricular (AV) node
|
|
|
Term
|
Definition
Atrial Fibrillation Rhythm - Irregularly irregular Rate - usually 100-160 beats per minute but slower if on medication QRS Duration - Usually normal P Wave - Not distinguishable as the atria are firing off all over P-R Interval - Not measurable The atria fire electrical impulses in an irregular fashion causing irregular heart rhythm
|
|
|
Term
|
Definition
Atrial Flutter Rhythm - Regular Rate - Around 110 beats per minute QRS Duration - Usually normal P Wave - Replaced with multiple F (flutter) waves, usually at a ratio of 2:1 (2F - 1QRS) but sometimes 3:1 P Wave rate - 300 beats per minute P-R Interval - Not measurable As with SVT the abnormal tissue generating the rapid heart rate is also in the atria, however, the atrioventricular node is not involved in this case.
|
|
|
Term
|
Definition
1st Degree Atrioventricular Block Rhythm - Regular Rate - Normal QRS Duration - Normal P Wave - Ratio 1:1 P Wave rate - Normal P-R Interval - Prolonged (>5 small squares) |
|
|
Term
|
Definition
Ventricular Tachycardia - Rhythm - Regular
- Rate - 180-190 Beats per minute
- QRS Duration - Prolonged
- P Wave - Not seen
- Results from abnormal tissues in the ventricles generating a rapid and irregular heart rhythm. Poor cardiac output is usually associated with this rhythm thus causing the pt to go into cardiac arrest. Shock this rhythm if the patient is unconscious and without a pulse
|
|
|
Term
|
Definition
Ventricular Fibrillation - Rhythm - Irregular
- Rate - 300+, disorganised
- QRS Duration - Not recognisable
- P Wave - Not seen
- This patient needs to be defibrillated!! QUICKLY
|
|
|
Term
|
Definition
Asystole Rhythm - Flat Rate - 0 Beats per minute QRS Duration - None P Wave - None Carry out CPR!! |
|
|
Term
|
Definition
Myocardial Infarction - Rhythm - Regular
- Rate - 80 Beats per minute
- QRS Duration - Normal
- P Wave - Normal
- S-T Element does not go isoelectric which indicates infarction
|
|
|
Term
|
Definition
2nd Degree Block Type 1 (Wenckebach) - Rhythm - Regularly irregular
- Rate - Normal or Slow
- QRS Duration - Normal
- P Wave - Ratio 1:1 for 2,3 or 4 cycles then 1:0.
- P Wave rate - Normal but faster than QRS rate
- P-R Interval - Progressive lengthening of P-R interval until a QRS complex is dropped
|
|
|
Term
|
Definition
2nd Degree Block Type 2 - Rhythm - Regular
- Rate - Normal or Slow
- QRS Duration - Prolonged
- P Wave - Ratio 2:1, 3:1
- P Wave rate - Normal but faster than QRS rate
- P-R Interval - Normal or prolonged but constant
|
|
|
Term
|
Definition
3rd Degree Block - Rhythm - Regular
- Rate - Slow
- QRS Duration - Prolonged
- P Wave - Unrelated
- P Wave rate - Normal but faster than QRS rate
- P-R Interval - Variation
- Complete AV block. No atrial impulses pass through the atrioventricular node and the ventricles generate their own rhythm
|
|
|
