The ECG Course

Adam  Thompson,  EMT-­‐P,  BAS  

Chapter  8  Atrial  Rhythms  

Atrial Rhythms

Atrial Rhythms

Ectopic Atrial Tachycardia

•  Rate:  100  -­‐  180  bpm  •  Rhythm:  Regular  •  P  wave:  Present,  may  be  different  w/  ectopy  •  P:QRS  raHo:  1  to  1  •  PR-­‐interval:  Normal,  different  w/  ectopy  •  QRS  Width:  <  120  ms  (0.12  sec)  

WAP/MAT

WAP/MAT

Wandering Atrial Pacemaker

•  Rate:  <  100  bpm  •  Rhythm:    Irregularly-­‐Irregular  •  P  wave:  At  least  3  different  morphologies  •  P:QRS  raHo:  1  to  1  •  PR-­‐interval:  Variable  •  QRS  Width:  <  120  ms  (0.12  sec)  

Multifocal Atrial Tachycardia

•  Rate:  >  100  bpm  •  Rhythm:    Irregularly-­‐Irregular  •  P  wave:  At  least  3  different  morphologies  •  P:QRS  raHo:  1  to  1  •  PR-­‐interval:  Variable  •  QRS  Width:  <  120  ms  (0.12  sec)  

WAP/MAT

WAP/MAT

Atrial Flutter

Atrial Flutter

•  Rate:  Atria  (250-­‐350),  Ventricles  (125-­‐175)  •  Rhythm:    Usually  Regular  •  P  wave:  Saw  toothed  “F  waves”  •  P:QRS  raHo:  Variable,  2:1  is  common  •  PR-­‐interval:  Variable  •  QRS  Width:  <  120  ms  (0.12  sec)  

Atrial Flutter

Atrial Flutter

Atrial Flutter

Atrial Flutter

Atrial Fibrillation

Atrial Fibrillation

•  Rate:  Variable,  depending  on  ventricles  •  Rhythm:    Irregularly-­‐Irregular  •  P  wave:  None,  chaoHc  atrial  acHvity  •  P:QRS  raHo:  None  •  PR-­‐interval:  None  •  QRS  Width:  <  120  ms  (0.12  sec)  

Atrial Fibrillation

Atrial Fibrillation

Atrial Fibrillation

Atrial Fibrillation

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