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ECG P-waves
p-waves for ecg rules
| Question | Answer |
|---|---|
| Sinus Rhythm p-wave | 1 Positive; one proceeds each QRS |
| Sinus Bradycardia p-wave | 2 Positive; one proceeds each QRS |
| Sinus Tachycardia p-wave | 3 Positive; one proceeds each QRS |
| Sinus Arrhythmia p-wave | 4 Positive; one proceeds each QRS |
| SA Block p-wave | When present; Positive; one proceeds each QRS |
| Sinus Arrest p-wave | Positive; one proceeds each QRS; When Present. |
| PAC's p-wave | premature; positive in lead 2, one precedes each QRS, differ from sinus p-waves, may be lost in preceding t-wave |
| Wandering Atrial Pacemaker p-wave | Size, shape and direction may change from beat to beat |
| Atrial Flutter p-wave | No identifiable p-waves, "Saw toothed" or flutter waves present |
| Atrial Fibrillation p-wave | no identifiable p-waves fibrilatory waves present, erratic wavy baseline. |
| WPW Wolf-Parkinson-White p-wave | Normal and positive in Lead 2 unless WPW is associated with A-Fib. |
| PJC'S P-Waves | 1 May occur before during or after QRS, If visible the P-Wave is inverted in leads II III aVF |
| Junctional Escape Beat P-Waves | 2 May occur before during or after QRS, If visible the P-Wave is inverted in leads II III aVF |
| Junctional Escape Rhythm P-Waves | 3 May occur before during or after QRS, If visible the P-Wave is inverted in leads II III aVF |
| Accelerated Junctional Rhythm p-waves | 4 May occur before during or after QRS, If visible the P-Wave is inverted in leads II III aVF |
| Junctional Tachycardia p-waves | 5 May occur before during or after QRS, If visible the P-Wave is inverted in leads II III aVF |
| PVC's P-waves | 1 usually absent or, with retrograde conduction to the atria, may appear after the QRS (usually upright in the ST-segment or T-Wave. |
| Ventricular Escape Beat P-Waves | 2) usually absent or, with retrograde conduction to the atria, may appear after the QRS (usually upright in the ST-segment or T-Wave. |
| Idioventricular Rhythm P-waves | 3) usually absent or, with retrograde conduction to the atria, may appear after the QRS (usually upright in the ST-segment or T-Wave. |
| Accelerated idioventricular Rhythm p-waves | 4) usually absent or, with retrograde conduction to the atria, may appear after the QRS (usually upright in the ST-segment or T-Wave. |
| Monomorphic Ventricular Tachycardia p-waves | May be present or absent, if present the have no set relationship to the QRS complexes appearing between the a rate different than that of the VT |
| Polyporphic Ventricular Tachycardia p-waves | independent or None |
| Ventricular Vibrilation p-waves | Absent |
| Asystole p-waves | None,(some p-waves may be observed in p-wave asystole. |
| First Degree Block p-waves | normal, one p-wave precedes each QRS. |
| Second Degree Type I p-waves | 1 Normal in size and shape; some p-waves not followed by a QRS complex (more p-waves than QRS's |
| Second Degree Type II P-waves | 2 Normal in size and shape; some p-waves not followed by a QRS complex (more p-waves than QRS's |
| Second Degree 2:1 conduction P-Waves | 3 Normal in size and shape; some p-waves not followed by a QRS complex (more p-waves than QRS's |
| Third Degree Block P-Waves Complete Block) | 4 Normal in size and shape; some p-waves not followed by a QRS complex (more p-waves than QRS's |
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