EKG RHYTHMS
| SINUS RHYTHMS | ||||||
| NORMAL | BRADY | TACHY | DYSRHYTHMIA | ARREST | ||
| RATE | 60-100 | <60 | >100 | 60-100 | <60 OR 60-100 | |
| RHYTHM | Regular | Regular | Regular | Irregular | Irregular | |
| P WAVE | Present | Present | Present | Present | Present | |
| QRS = PWV | Yes | Yes | Yes | Yes | Yes | |
| PWV = QRS | Yes | Yes | Yes | Yes | Yes | |
| ECTOPY/VARIENCE | No | No | No | No | Periods of cardiac standstill | |
| PRI | 0.12 - 0.20 | 0.12 - 0.20 | 0.12 - 0.20 | 0.12 - 0.20 | 0.12 - 0.20 | |
| QRS | < 0.12 | < 0.12 | < 0.12 | < 0.12 | < 0.12 | |
| ATRIAL RHYTHMS | ||||||
| "Wandering Pacemaker" Multiformed Atrial Rhythm | Multifocal Atrial Tachycardia | Atrial Flutter | Atrial Fibrillation | Supra Ventricular Tachycardia | WPW | |
| RATE | Usually <100 | >100 | Variable (often 150-160) | Variable (often 150-160) | >100 | Usually 60-100 |
| RHYTHM | Slightly Irregular | Slightly Irregular | A=Regular, V=Regular or Irregular | V=Irregularly Irregular | Regular | Regular unless associated with AFIB |
| P WAVE | Change from Complex to Complex 3 or less P Wave Morphologies | Change from Complex to Complex 3 or more P Wave Morphologies | "flutter" waves shaped like picket fence/sawtooth | No P Waves, Fribillatory Waves | Not Discernable | Present |
| QRS = PWV | Yes | Yes | Yes | No | N/A | Yes |
| PWV = QRS | Yes | Yes | No | No | N/A | Yes |
| ECTOPY/VARIENCE | 3 or less P wave Morphologies as pacemaker site changes | 3 or more P wave Morphologies as pacemaker site changes | Flutter Waves | Fribillatory Waves | None | Delta Wave may be seen in one or more leads |
| PRI | Variable | Variable | Not measurable | Not Measureable | If P Waves 0.12-0.20 | If P Waves <0.12 |
| QRS | <0.12 | <0.12 | <0.12 | <0.12 | <0.12 | >0.12 Slurred Upstroke of QRS |
| JUNCTIONAL RHYTHMS | ||||||
| Junctional Escape Rhythm | Accelerated Junctional Rhythm | Juctional Tachycardia | ||||
| RATE | 40-60 | 60-100 | 101-180 | |||
| RHYTHM | Regular | Regular | Regular | |||
| P WAVE | Inverted, Occurs before, after, or during QRS | Inverted, Occurs before, after, or during QRS | Inverted, Occurs before, after, or during QRS | |||
| QRS = PWV | Varies | Varies | Varies | |||
| PWV = QRS | Varies | Varies | Varies | |||
| ECTOPY/VARIENCE | Possible retrograde conduction to Atria | Possible retrograde conduction to Atria | Possible retrograde conduction to Atria | |||
| PRI | If P Wave, P Wave ³ 0.12 | If P Wave, P Wave ³ 0.12 | If P Wave, P Wave ³ 0.12 | |||
| QRS | < 0.12 | < 0.12 | < 0.12 | |||
| A/V BLOCKS | ||||||
| First Degree | Second Degree, Type I | Second Degree, Type 2 | Third Degree | |||
| RATE | Usually 60-100 | Variable may be <60 | Variable may be <60 | Atrial > Ventricle | ||
| RHYTHM | Regular | Irregular (dropped QRS) | Irregular (dropped QRS) | Regular but not connected | ||
| P WAVE | Present | Present | Present | Present | ||
| QRS = PWV | Yes | Yes | Yes | No | ||
| PWV = QRS | Yes | No | No | No | ||
| ECTOPY/VARIENCE | None | None | None | None | ||
| PRI | >0.20 | Progressively > until dropped QRS | Constant with Dropped QRS | Disassociated | ||
| QRS | <0.12 | <0.12 | <0.12 | Variable depending on Pacemaker | ||
| VENTRICULAR RHYTHMS | ||||||
| Idioventricular | Accelerated IVR | V•Tach | V•Fib | Torsades | ||
| RATE | 15-40 | 41-110 | 101-250 | Cannot be determined | 150-300 | |
| RHYTHM | Regular | Regular | Regular | Rapid & Chaotic | Regular or Irregular | |
| P WAVE | Absent or After QRS | Absent or After QRS | Present or Absent (with disassociation) | None | None | |
| QRS = PWV | N/A | N/A | N/A | N/A | N/A | |
| PWV = QRS | N/A | N/A | N/A | N/A | N/A | |
| ECTOPY/VARIENCE | ||||||
| PRI | N/A | N/A | N/A | N/A | N/A | |
| QRS | >0.12 T Wave in Opposite Direction of QRS | >0.12 T Wave in Opposite Direction of QRS | >0.12 T Wave in Opposite Direction of QRS | Not Discernable | >0.12 T Wave in Opposite Direction of QRS | |
| PREMATURE RHYTHMS | ||||||
| PAC | PJC | PVC | ||||
| RATE | Depends on Underlying Rhythm | Depends on Underlying Rhythm | Depends on Underlying Rhythm | |||
| RHYTHM | Regular Except for PAC | Regular Except for PJC | Regular Except for PVC | |||
| P WAVE | Differs from Underlying Rhythm | Inverted, Occurs before, after, or during QRS | None | |||
| QRS = PWV | Yes | Variable | No, No Pwave for PVC | |||
| PWV = QRS | Yes | Variable | Yes (Underlying Rhythm) | |||
| ECTOPY/VARIENCE | ||||||
| PRI | .012 - 0.20 | If P Wave <0.12 | N/A | |||
| QRS | <0.12 | <0.12 | >0.12 Early, wide and bizarre |