Flutter P waves

Flutter P waves make the baseline of the ECG resemble a sawtooth pattern. They are caused by Atrial Flutter.

See also: P wave

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We can calculate atrial and ventricular rates separately if needed.

Example: Consider the above rhythm strip where the P waves (the atria) are running at a completely separate rate to the QRS complexes (the ventricles).

  • The P waves are 3 large squares apart, so the atrial rate is 300 / 3 = 100 beats per minute.
  • The QRS complexes are 8.5 large squares apart, so the ventricular rate is 300 / 8.5 = 35 beats per minute.

Related

Irregular baselines
  • Irregular baselines:
  • ECG Library (27)

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    In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Flutter P waves Regular Right Axis Deviation Tachycardia Tall QRS Atrial flutter ECG of the Week CC-BY-NC-SA
    ECG of the Week – 2nd July 2018 – Interpretation

    This ECG is from a woman in her 50s who presented with chest pain on a background of mitral stenosis secondary to rheumatic fever.

    In the ECGquest archives, this ECG has been tagged with: - 12-Lead Flutter P waves Atrial flutter Dr Smith's ECG Blog CC BY-NC
    What is the cause of this patient’s inferior ST depressions?
    In the ECGquest archives, this ECG has been tagged with: - Vomiting 12-Lead Flutter P waves Narrow QRS Regular Tachycardia Atrial flutter Dr Smith's ECG Blog CC BY-NC
    Inferolateral ST elevation, vomiting, and elevated troponin
    In the ECGquest archives, this ECG has been tagged with: - Vomiting 12-Lead Serial 12-lead Flutter P waves Narrow QRS Regular Tachycardia Atrial flutter Dr Smith's ECG Blog CC BY-NC
    Inferolateral ST elevation, vomiting, and elevated troponin – repeat ECG
    In the ECGquest archives, this ECG has been tagged with: - Vomiting 12-Lead Serial 12-lead Flutter P waves Narrow QRS Regular Tachycardia Atrial flutter Change in rhythm Dr Smith's ECG Blog CC BY-NC
    Inferolateral ST elevation, vomiting, and elevated troponin – repeat ECG 2, with vomit
    In the ECGquest archives, this ECG has been tagged with: - Vomiting 12-Lead Serial 12-lead Flutter P waves Irregular Narrow QRS Tachycardia Atrial flutter Change in rhythm Dr Smith's ECG Blog CC BY-NC
    Inferolateral ST elevation, vomiting, and elevated troponin – repeat on diltiazem drip
    In the ECGquest archives, this ECG has been tagged with: - Palpitations 12-Lead Flutter P waves Atrial flutter Dr Smith's ECG Blog CC BY-NC
    What happens when you give adenosine to a patient with this rhythm?
    In the ECGquest archives, this ECG has been tagged with: - Palpitations Rhythm Strip Flutter P waves Atrial flutter Dr Smith's ECG Blog CC BY-NC
    What happens when you give adenosine to a patient with this rhythm? – after adenosine